1. a ball is dropped from a height of 10 meters onto a hard surface so that the collision at the surface may be assumed elastic. under such conditions the motion of the ball is
Answers
When a ball is dropped from a height of 10 meters onto a hard surface with an assumed elastic collision, the motion of the ball will exhibit specific characteristics.
When the ball is dropped, it undergoes free fall acceleration due to gravity. As it approaches the hard surface, it gains speed due to the acceleration. Upon collision, assuming an elastic collision, the ball rebounds back up from the surface with the same speed and energy it had before the collision.
The direction of motion is reversed, causing the ball to move upwards. The ball will then undergo a deceleration due to gravity, gradually losing speed until it reaches its maximum height. The process continues, with the ball oscillating up and down, gradually losing energy due to friction and air resistance until it eventually comes to rest.
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Related Questions
What type of material are magnets usually made of
Answers
Answer:
They come from metal elements or alloys.
Explanation:
Different materials produce magnets of varying strengths. Ceramic magnets, also known as ferric magnets, are made of iron oxide in a ceramic composite. Samarium cobalt magnets are created from the combination of cobalt and samarium, which is a rare-earth element. Neodymium magnets contain boron, iron and neodymium, also a rare-earth element. The strongest naturally occurring magnet is lodestone, a form of magnetite. It attracts even small objects, such as staples and paper clips.
In an experiment, two objects, object X and object Y, travel toward each other and collide. Data are collected about
each object before, during, and after the collision, as shown in the table. Which ofthe following pairs of data, when
used together to create two graphs, could verify the conservation of momentum? Select two answers.
A) Average force exerted on object X by object Y and time of collision, because these measurements can be used to determine the change in momentum of object X.
B) Average force excreted on object Y by object X and time it collision, because these measurements can be used to determine the change in momentum of object Y.
C) Mass of object X and velocity of object X before collision, because these measurements can be used to determine the initial momentum of object X.
D) Mass of object Y and velocity of object Y before collision, because these measurements can be used to determine the initial momentum of object X.
Answers
(a) Average force exerted on object X by object Y and time of collision, because these measurements can be used to determine the change in momentum of object X.
(b) Average force excreted on object Y by object X and time it collision, because these measurements can be used to determine the change in momentum of object Y.
What is conservation of linear momentum?The principle of conservation of linear momentum, states that in the absence of external force, the sum of initial momentum must be equal to sum of final momentum.
P = mv
where;
m is massv is velocityp is momentumF = mv/t
Ft = mv
J = Δmv
where;
J is impulse = FtΔmv is change in momentummass of object X and object Y are constant, and cannot be used create graphs.
Impulse (product of force and time) received by an object is equal to change in the momentum of the object.
Thus, the pairs of data that can be used together to create two graphs, to verify the conservation of momentum are;
(a) Average force exerted on object X by object Y and time of collision, because these measurements can be used to determine the change in momentum of object X.
(b) Average force excreted on object Y by object X and time it collision, because these measurements can be used to determine the change in momentum of object Y.
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A bus leaves Houston at 6am headed toward Austin at a constant speed of 54.3 miles/hr. If Austin is located 190 miles west of Houston, approximately when will the bus arrive in Austin?
Answers
resolved for the constant speed as the ratio of distance and time. We have B as the speed, the, as the distance at the at the time it is given that the bus leaves easter and other exactly six o'clock in the morning In Travis at a constant speed of 54.3 mph to Austin, which is located at a distance of 190 miles away. We want to find the arrival time. So first is that satisfying the time of travel to suffer the time from the given equation. And we have B equals distance divided by the speed. The distance is 190 miles and the speed is 54.3 mph. We get time here in terms of R. S. S 3.5, So it takes three hours and three hours and 30 minutes to travel, he said distance. So if it's if the bus departs at the at the time of six of clubs, So three hours and 30 minutes after that, it will arrive to Austin. So that means the arrival time will be nine 30 in the morning, So that's three hours and 20 minutes. Oh, after six o'clock. So I hope everything is clear.
From 10 to 20 seconds, the object is traveling at a constant 5 meters per second. How far did it travel in that 10 second time frame?
Answers
Answer:50m
Explanation:
What color should the sun be, based upon wiens law?
Answers
According to Wien's law, the color of the sun should be a bright white or slightly bluish-white. This is because Wien's law states that the peak wavelength of the sun's radiation is in the ultraviolet region, which corresponds to a color on the blue end of the visible spectrum.
However, since the sun emits radiation across a broad range of wavelengths, it appears as a bright white ball in the sky to the human eye.
Based on Wien's Law, the Sun's color is primarily white. Wien's Law helps determine the peak wavelength of radiation emitted by a black body, such as the Sun, based on its temperature. The Sun's surface temperature is around 5,500°C (9,932°F), which corresponds to a peak wavelength in the visible light spectrum, causing it to appear white to the human eye.
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Alice is running due West at 6m/s. Later she is running due East at 4m/s. How could we write a velocities to show that they are in opposite directions
Answers
Velocity is a vector quantity that has both magnitude and direction. When Alice is running due West at 6m/s, her velocity can be represented as a vector of magnitude 6m/s in the direction of the West. Similarly, when she is running due East at 4m/s, her velocity can be represented as a vector of magnitude 4m/s in the direction of the East.
Since the directions are opposite, we can show the velocities as vectors in opposite directions by assigning negative signs to one of the velocities. For example, we can write:
Velocity of Alice = 6 m/s West - 4 m/s EastHere, the negative sign indicates that the velocity of 4 m/s is in the opposite direction to the velocity of 6 m/s. The resulting velocity of Alice is the difference between the two velocities, which is:
Velocity of Alice = 6 m/s - 4 m/sVelocity of Alice = 2 m/s WestTherefore, the velocity of Alice in opposite directions can be represented as a vector of magnitude 2 m/s in the direction of the West.
~ Zeph
for two objects in space with very different masses, the gravitational force causes:
A.
the two objects to remain stationary.
B.
the less-massive object to orbit the more-massive object.
C.
the more-massive object to orbit the less-massive object.
D.
the two objects to both orbit a central point together.
Answers
Explanation: The more massive the object, the larger its gravitational pull.
Example: the moon orbits the earth because the moon’s mass is smaller than earth, earth orbits the sun because the earth’s mass is smaller than the sun..
he cars mass was only 111 kg. Suppose two of these cars are used in a stunt crash for an action film. If one car's initial velocity is 9.00 m/s to the right and the other car's velocity is 5.00 m/s to the left, how much kinetic energy is discinated in the crash
Answers
In the crash 5883 Joule kinetic energy is discinated when two of these cars are used in a stunt crash for an action film.
How do you use start kinetic energy to calculate end kinetic energy?Final kinetic energy (KE) is equal to 1/2 m1v'12 + 1/2 m2v'22 , or joules. The end kinetic energy for common things will be lower than the starting point. The only way you can increase kinetic energy is if the impact causes an energy release of some type.
How can total kinetic energy be calculated?As a result, the kinetic energy equation states that it is equal to 1/2 the object's mass times the magnitude of its velocity squared, or speed squared.
Initial kinetic energy KE,
\(KE=1/2 m_1v_1^2 + 1/2 m_2v_2^2\)
\(KE=1/2 (111)(9.00)^2 + 1/2 (111)(5.00)^2\)
\(KE= 4495.5+1387.5\)
\(KE= 5883J\)
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Help: The diagram below illustrates a light ray bouncing off a surface. Fill in the boxes with the correct terms.
Answers
The correct terms that fills the box are;
(i) The incident ray
(ii) The normal
(iii) The reflected ray
(iv) The angle of incident
(v) The reflected angle
What is the terms of the ray diagram?The terms of the ray diagram is illustrated as follows;
(i) This arrow indicates the incident ray, which is known as the incoming ray.
(ii) This arrow indicates the normal, a perpendicular line to the plane of incidence.
(iii) This arrow indicates the reflected ray; the out going arrow.
(iv) This the angle of incident or incident angle.
(v) This is the reflected angle or angle of reflection.
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A tap supplies water at 26°c while another supplies at 82°c. If a man wishes to bath with water at 40°c, what is the ratio of the mass of hot water to that of cold water
Answers
Where a tap supplies water at 26°c while another supply at 82°c. If a man wishes to bath with water at 40°c, then the ratio of the mass of hot water to that of cold water is: 1/3.
What is the rationale for the above response?The ratio of the mass of hot water to that of Cold water is determined as follows:
M₁C (82 40) = M₂C (40-26)
Where M₁C is the Mass of Tap 1; and
M₂C is the Mass of Tap 2.
Thus,
M₁C (82 40) = M₂C (40-26)
M₁/M₂ = 14/42
= 1/3
Thus, it is right to state that the ratio of the mass of hot water to that of cold water is: 1/3.
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27. Julie and Ashwin were doing an experiment in the classroom. They
each had to move a 15 kg box. Julie was able to move her box, but
Ashwin was only able to move his after removing half the items in the
box. Which is true regarding the force he applies after removing the
items from the box?
a
He has to apply more force to lift the box
because the mass is greater.
b
He has to apply less force to lift the box
because the mass has decreased.
С
He has to apply a different type of force after
changing the mass.
d
He has to apply the same amount of force to
the box to overcome gravity.
Answers
Answer:
b. He has to apply less force to lift the box because the mass has decreased.
Explanation: i just took a ck12 test and it was right lol
When one substance is converted into another, there is always an associated conversion T/F?
Answers
True, One form of energy is constantly turned into another when one substance is transformed into another.
Define energy.
Energy is the ability to do work. It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred from one body to another.
The process of converting energy from one form to another is called energy transformation or energy conversion. Electrical energy can be produced from chemical energy. Heat energy can be produced from thermal energy. Electrical energy, potential energy, etc. can be created from mechanical energy.
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The fact that a thermometer "takes its own temperature" illustrates
A. thermal equilibrium. B. energy conservation C. the difference between heat and internal energy D. the fact that molecules are constantly moving.
Answers
The correct answer is option (A). The fact that a thermometer "takes its own temperature" illustrates the concept of thermal equilibrium.
Thermal equilibrium refers to a state where two objects or systems are at the same temperature and there is no net transfer of heat between them. In this case, the thermometer, being in thermal contact with its surroundings, eventually reaches a state of equilibrium where it shares the same temperature as its environment. Once thermal equilibrium is reached, the thermometer accurately reflects the temperature of its surroundings, effectively "taking its own temperature."
The concept of thermal equilibrium highlights the idea that heat transfer occurs until a balanced state is achieved. It is a manifestation of energy conservation because, in the process, energy is conserved. Heat refers to the transfer of thermal energy between objects, while internal energy represents the total energy stored within a substance, including both its kinetic and potential energies.
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Describe the difference between potential and kinetic energy
Answers
Answer:
Explanation:
Kinetic energy involves motion so something that is not moving has zero kinetic energy.
Potential energy does not involve motion and is based on position in a field like gravity and magnetic.
The half life of phosphorus-33 is 25 days. After 50
days, What is the original sample size if 10 g
remain?
Answers
The half-life of a first-order reaction is a constant that is related to the rate constant for the reaction: t1/2 = 0.693/k.
What is phosphorus-33?It is used in life-science laboratories in applications in which lower energy beta emissions are advantageous such as DNA sequencing. P can be used to label nucleotides. It is less energetic than 32P, giving a better resolution.
Phosphorus 33 is an artificial radioactive element. It is produced with a low yield by the neutron bombardment of phosphorus 31 (stable). The phosphorus 33 has a radioactive period of 25.3 days.
Phosphorus-33 atom is the radioactive isotope of phosphorus with relative atomic mass 32.971725, half-life of 25.34 days and nuclear spin (1)/2.
Phosphorus was discovered by the German merchant Hennig Brand in 1669.
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4. Which of the three approaches to sociological investigation best fit the study: scientific
sociology, interpretive sociology, or critical sociology? Why? (4 points)
Answers
Scientific sociology is one of the three methods of sociological investigation that fits the topic the best.
The definition of scientific sociologyIt is possible to define sociology as the scientific study of society, which includes a complete analysis of both internal and external elements that can have an impact on social structures and interaction patterns.
It should be noted that while the sociology field is very broad and full of opportunities that are required to complete the study that is being discussed in the work, this study focuses on social interaction and culture, which help to determine the things that can be used to learn more about the society.
In conclusion, of the three methods of sociological inquiry, scientific sociology is the most effective for the study of society.
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we start with one bulb, a, connected to 12-v battery. if we then added another identical bulb, b, connected to bulb a in parallel, what would happen to the brightness of bulb a?
Answers
Adding an identical bulb B in parallel to bulb A will not change the brightness of bulb A. The total resistance of the circuit decreases, but the current flowing through each bulb remains the same, keeping the brightness of bulb A constant.
In this scenario, you have a bulb A connected to a 12-volt battery, and you are adding another identical bulb B in parallel to bulb A. We will analyze the effect on the brightness of bulb A.
When two identical bulbs are connected in parallel, the total resistance of the circuit decreases, as the inverse of the total resistance is equal to the sum of the inverses of the individual resistances.
In other words,
\(1/R_{total} = 1/R_A + 1/R_B\)
Since the bulbs are identical, we can denote their resistance as R,
so
\(1/R_{total} = 2/R\)
This gives \(1/R_{total} = R/2\), meaning the total resistance is half of the resistance of a single bulb.
According to Ohm's Law (V = IR), the current flowing through the circuit is
I = V/\(1/R_{total} \)
Substituting the values, we get I = 12 / (R/2) = 24/R.
Since the total current has doubled compared to the initial scenario with only bulb A, the current flowing through each bulb in the parallel configuration is equal and remains the same as before, i.e., 12/R.
Brightness is related to power (P), which can be calculated as
P = I²R.
Since the current flowing through each bulb remains the same in the parallel configuration, the power, and thus the brightness, of each bulb also stays the same.
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A force of 16 N to the west is applied to each object below. Which object will
undergo the greatest change in momentum?
A. A 41 kg object that is moving east at 5 m/s
B. A 41 kg object that is moving east at 10 m/s
C. A 44 kg object that is moving east at 10 m/s
D. A 44 kg object that is moving east at 5 m/s
Answers
41kg object that is moving east at 5 m s
Answer:
41kg object that is moving east at 5 m s
Explanation:
The 17th century astronomer who kept a roughly 20 year continuous record of the positions of the Sun, Moon, and planets was: Group of answer choices
Answers
The 17th-century astronomer who kept a roughly 20-year continuous record of the positions of the Sun, Moon, and planets was Johannes Hevelius.
Hevelius was a Polish astronomer, mathematician, and brewer who made significant contributions to the field of astronomy during the 17th century. He meticulously observed and recorded the positions of celestial objects, publishing his observations in his monumental work titled "Prodromus Astronomiae" in 1690. This work contained a detailed star catalog, lunar maps, and records of planetary positions, including those of the Sun and Moon.
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ethe earth takes 1 day to rotate once about its axis. what is the angular v elocity of a point on the surface of the earth studentroom physics ocr a
Answers
The angular velocity of a point on the surface of the earth is \(7.3 * 10^{-5} rad/s\)
What is angular velocity?
Angular velocity is a vector quantity and is described as the rate of change of angular displacement which specifies the angular speed or rotational speed of an object and the axis about which the object is rotating.
What is angular velocity and write its formula?
Angular velocity is the rate of change of the position angle of an object with respect to time, so w = theta / t, where w = angular velocity, theta = position angle, and t = time.
Every point on the earth's surface completes one circular orbit (centered at a point on the axis) in 1 day
1 day = 24x60x60
1 day=86400s
Angular velocity is given by :
\(w =2\pi /86400\\ w =7.3*10^{-5} rad/s\)
Thus, \(7.3 * 10^{-5} rad/s\) is the correct answer.
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The physical quantity represented as rate of change of change in position in a
particular direction.
a) Speed
b) Velocity
c) Average speed
d) acceleration
Answers
Answer:
B
rate of change of its position with respect to a frame of reference, and is a function of time.
Redox reactions include which types of reactions?
A. Single-replacement, double-replacement, acid-base, synthesis
B. Single-replacement, synthesis, decomposition, combustion
C. Acid-base, decomposition, double-replacement, synthesis
O D. Double-replacement, combustion, synthesis, decomposition
Answers
Answer:Single-Replacement, synthesis, decomposition, combustion.
Explanation:
Had to get it wrong to find out
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions. Hence option B is correct.
What is redox reaction ?Redox reaction is type of reaction in which oxidation number participating molecules changes. Redox reaction involves two types of the reaction oxidation and reduction. these two reaction take place simultaneous. Oxidation is the loss of electrons and reduction is the gain of electrons.
Oxidation is nothing but addition of oxygen and loss of hydrogen and reduction is loss of oxygen and gain of hydrogen.
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions.
The oxidation half-reaction is: H₂ → 2H⁺ + 2e⁻
The reduction half-reaction is: F₂ + 2e⁻ → 2F⁻
Hence option B is correct.
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you throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 6.00 s after it was thrown. what is the speed of the rock just before it reaches the water 23.0 m below the point where the rock left your hand? ignore air resistance. express your answer with the appropriate units.
Answers
The required speed of the rock just before it reaches the water 23.0 m below the point where the rock left your hand is calculated to be 3.82 m/s.
The measurement of distance is the separation between two things or points. Typically, it is expressed in measures like meters, kilometers, miles, and feet. Distance can be used to gauge a journey's duration, a room's size, or the separation between two places. It can also be used to gauge an object's velocity, a mountain's elevation, or a lake's depth. Finding the shortest path between two places in daily life involves using distance, a key idea in both mathematics and science.
The time taken by the rock is given as 6 s.
The distance the rock below the point where the rock left your hand is 23 m.
The equation of speed, distance and time is known as,
⇒ 23/6 = 3.82 m/s
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What is the centripetal acceleration acting on a 19 kg ball if it is being spun around by a tension force of 125 N?
Answers
Answer:
Explanation:
The centripetal acceleration:
aₙ = F /m = 125 /19 ≈ 6.6 m/s²
4. how does the intensity of a linearly polarized electromagnetic wave relate to its electric field?
Answers
The intensity of a linearly polarized electromagnetic wave is directly proportional to the square of its electric field amplitude.
The electric field of a linearly polarized electromagnetic wave can be represented by a sine or cosine function, where the amplitude of the wave represents the maximum value of the electric field.
The intensity of the wave is proportional to the average power per unit area that is carried by the wave.
Mathematically, the intensity (I) of an electromagnetic wave is given by the formula:
I = (1/2)εcE0^2
where ε is the electric constant (approximately equal to 8.85 x 10^-12 F/m), c is the speed of light in a vacuum (approximately equal to 3.00 x 10^8 m/s), and E0 is the amplitude of the electric field.
From this formula, it is clear that the intensity of the wave is proportional to the square of the electric field amplitude.
Therefore, if the electric field amplitude of a linearly polarized electromagnetic wave is increased by a factor of 2, the intensity of the wave will increase by a factor of 4 (i.e., 2 squared).
Similarly, if the electric field amplitude is decreased by a factor of 2, the intensity of the wave will decrease by a factor of 4.
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A bar of mass M and length L = 4 meters is pivoted on a fulcrum that is d = 1.8 meters away from the left end. Attached to the left end, a mass m = 5 kg hangs at rest and keeps the system in equilibrium. What is the mass of the bar?
Answers
The given problem can be exemplified in the following diagram:
The weight of the bar is concentrated in its center of mass which is located in the middle of the longitude of the bar. We can add the total torques at the point where the pivot touches the bar and we get:
\(\Sigma T=(5\operatorname{kg})(g)(1.8m)-(2m-1.8m)(Mg)\)Here we have used momentum counter-clockwise as positive. Since the system is in equilibrium the sum of the torques must be equal to zero:
\((5\operatorname{kg})(g)(1.8m)-(2m-1.8m)(Mg)=0\)Now we solve the operations, we will use for the acceleration of gravity 9.8 meters per second squared:
\(88.2Nm-1.96M=0\)Now we solve for the mass "M" first by subtracting 88.2Nm from both sides:
\(-1.96M=-88.2Nm\)Now we divide both sides by -1.96:
\(M=\frac{-88.2Nm}{1.96m\frac{m}{s^2}}\)Solving the operations we get:
\(M=45\operatorname{kg}\)Therefore, the mass of the bar is 45 kg.
Why doesn't mercury have an atmosphere?
Answers
Answer:
The main reasons are two. Mercury's atmosphere is hard to hold onto because it is small and does not have much gravity. As Mercury is close to the Sun, any atmosphere is blasted away by material being blown off the Sun.
Hope this helps friend!
Filiberto va a 90m/s en su carri, de repente se distrae por un par de segundos y su velocdad pasa a 40 m/s ¿cual fue su aceleracion de su movimientonto
Answers
Answer:
Filiberto experimenta una deceleración de \(2\,\frac{m}{s^{2}}\).
Explanation:
(The problem was written in Spanish. Hence, explanation will be held in Spanish).
Asúmase que Filiberto se distrae por 2 segundos, puesto que un par equivale a dos, y que el vehículo experimenta un aceleración constante. La deceleración experimentada por el vehículo se deriva de la siguiente fórmula:
\(a = \frac{v-v_{o}}{\Delta t}\)
\(a = \frac{40\,\frac{m}{s}-90\,\frac{m}{s} }{2\,s}\)
\(a = -25\,\frac{m}{s^{2}}\)
Filiberto experimenta una deceleración de \(2\,\frac{m}{s^{2}}\).
in an automobile crash, a vehicle that was stopped at a red light is rear-ended by another vehicle. The vehicles have the same mass. If the tire marks show that the two vehicles moved after the collision at 4 m/s, what was the speed of the vehicle before the collision
Answers
The initial speed of the vehicle before the collision is 8 m/s.
Let the mass of the vehicle = mLet the initial speed of the vehicle stopped = uThe initial speed of the vehicle parked at the red light = 0Principle of conservation of linear momentumThe initial speed of the vehicle before the collision is calculated by applying principle of conservation of linear momentum as follows;
\(m_1 u_1 + m_2 u_2 = v(m_1 + m_2)\\\\mu + m(0) = 4(m+ m)\\\\mu = 4(2m)\\\\mu = 8m\\\\u = 8 \ m/s\)
Thus, the initial speed of the vehicle before the collision is 8 m/s.
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Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 62.0⁰ Part A If dog A exerts a force of 260 N and dog B exerts a force of 330 N, find the magnitude of the resultant force. Express your answer in newtons. 15. ΑΣΦ N Submit Request Answer Part B Find the the angle the resultant force makes with dog A's rope. Express your answer in degrees. 195 ΑΣΦ ? Submit Provide Feedback Request Answer 6 Next >
Answers
the angle the resultant force makes with dog A's rope is 34.4⁰.
Part A
We can calculate the magnitude of the resultant force using the law of cosines. The formula for the law of cosines is:
c^2 = a^2 + b^2 - 2abcos(C),
where a and b are the two forces and C is the angle between them.c^2 = 260^2 + 330^2 - 2(260)(330)cos(62.0)
Solving this equation will give us the value of c, which is the magnitude of the resultant force.
c = 524.9 N (rounded to three significant figures)
Therefore, the magnitude of the resultant force is 524.9 N.
Part B
We can calculate the angle the resultant force makes with dog A's rope using the law of sines. The formula for the law of sines is:
a/sin(A) = b/sin(B) = c/sin(C),
where a, b, and c are the sides of a triangle, and A, B, and C are the angles opposite those sides. We can use this formula to find the angle between the resultant force and dog A's rope.
We know the magnitude of the resultant force (c) and the force that dog A is exerting (a = 260 N), and we can use the law of cosines to find the angle between the two forces (C = 62.0⁰).
a/sin(A) = c/sin(C)sin(A)
= (a sin(C))/csin(A) = (260 sin(62.0))/524.9sin(A) = 0.5717A
= sin^-1(0.5717)A = 34.4⁰ (rounded to one decimal place)
Therefore, the angle the resultant force makes with dog A's rope is 34.4⁰.
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