Please help me please

Answer:

The second law of motion states that the force of an object is equal to its mass times its

acceleration.

o A change in motion occurs only if a net force is exerted on an object.

o A net force changes the velocity of the object, and causes it to accelerate.

o If an object is acted upon by a net force, the change in velocity will be in the

direction of the net force.

o The acceleration of an object depends on its mass.

o The more mass an object has or the more inertia it has, the harder it is to

accelerate.

o More mass means less acceleration if the force acting on the objects is the same.

Explanation:

Explanation:

The force exerted by the earth on a falling baseball is smaller than the force exerted by the earth on a falling bowling ball.  However, since the baseball has less mass than the bowling ball, the two accelerate at the same rate.  This is known as Galileo's gravity experiment, but it also demonstrates Newton's second law.

When a bowling ball hits a pin, the pin pushes back with equal and opposite force.  Because the bowling ball has a large mass, the acceleration caused by the force is small.  Since the pin has a small mass, the acceleration caused by the force is large.

Answer:

7 seconds

Explanation:

please see paper!

vf² = vo²+2ad

vf=vo+at

vf²=3.5²+2.2.75

vf²=312.25

vf=17.67 m/s

vf=vo+at

17.67 = 3.5 +2t

t=7.085 s

Answer:

.12 kg

Explanation:

Area under car = pi 3^2 = 9 pi  m^2

Area of piston = pi (.03)^2 = .0009 pi m^2

As a ratio:

.0009 / 9 =  x / 1200

x = 1200 ( .0009/9) = .12 kg  

Answer:

Let one side = Let the other side= Let area = Let perimeter= Now substitute into area formula

Explanation:

Answer:

Let one side Let the other side Let area  Let perimeter

Explanation:

ANSWER:

STEP-BY-STEP EXPLANATION:

Answer:

2 cm/s

Explanation:

As, 640cm/320s = 2cm/1s

Therefore, 2cm/ s

The carousel that rotates at 0.10 rev/s, takes 125.66 s to go around twice

To solve this uniform circular motion (UCM) problem the formula and the procedure we will use is:

w= (2*π *n)/t

Where:

Information about the problem:

Applying the angular velocity formula and isolating the time, we get:

w= (2*π *n)/t

t = (2*π *n)/w

t = (2 * 3.1416 * 2)rev / 0.10 rev/s

t = 125.66 s

When an object is in uniform circular motion, the angle described by the radius in each unit of time is known as angular velocity. It is measured in units of (rad/s) (revolutions/s).

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The equal and opposite force for the force of the elevator floor pushing up on the person as described by Newton's third law is the weight and the reaction force from its effect.

This is referred to as a device which is used in the vertical transportation of goods and people among the floors in a buildings.

When an individual steps into the elevator, the weight acts on it and it is known as a downward force while the reaction acts upward in an opposite reaction as described by Newton's third law in this scenario.

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The magnitude of the average acceleration of the tennis ball during the 12.0 millisecond contact time is \(\mathrm{ 737.5 \ m/s^2}\).

To calculate the magnitude of the average acceleration of the tennis ball during the 12.0 millisecond contact time, we can use the following formula:

a = (\(\mathrm {v_f - v_i}\)) / t

a is average acceleration, \(\mathrm{v_f }\)  is final velocity, \(\mathrm{v_i }\) is initial velocity, and t is  time interval.

\(\mathrm{mgh = 1/2 mv_f^2}\)

where m is mass of the ball, g is acceleration due to gravity (9.81 \(m/s^2\)), h is height of the drop (4.00 m), and \(\mathrm{v_f }\)  is the final velocity.

\(\mathrm{v_f }\) = \(\sqrt{(2gh)\)

\(\mathrm{v_f }\) = \(\sqrt{(2 \times 9.81 m/s^2 \times 4.00 m)}\) = 8.85 m/s

As we know, a = (\(\mathrm {v_f - v_i}\)) / t

a = (8.85 m/s - 0 m/s) / (12.0 ms / 1000 ms/s)

a =  \(\mathrm{ 737.5 \ m/s^2}\)

Therefore, the magnitude of the average acceleration of the tennis ball during the 12.0 millisecond contact time is \(\mathrm{ 737.5 \ m/s^2}\).

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Answer:

Asteroid 1 has more mass than asteroid 2

Explanation:

User avatar

thenoobygamerpro

01/25/2020

Physics

Middle School

answered

Asteroid 1 moving 8km/s right asteroid 2 moving 16 km/s left before the crash. After the crash asteroid 1 is moving 4 km/s left and changed speed bu 12km/s. Asteroid 2 moving 2km/s left and changed speed by 14km/s

Two asteroids crashed. The crashed caused both asteroids to change speed. Scientist want to use the change in speed and motion to figure out which asteroid has more mass. Based on the information in the diagram. which statement is correct? In your answer explain what the forces were like and why the asteroids changed motions

Asteroid 1 has more mass than asteroid 2

Asteroid 1 and asteroid 2 are the same mass

Or asteroid 1 has lees mass than asteroid 2

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Answer: Asteroid 1 has more mass than asteroid 2

Explanation:

We can use the conservation of momentum law to find the answer. So, according to this law:

"If two objects or bodies are in a closed system and both collide, the total momentum of these two objects before the collision will be the same as the total momentum of these same two objects after the collision".

This means the momentum before the collision or crash () is equal to the momentum after the collision ():

(1)

Before the crash:

(2)

Where:

is the mass of the first asteroid

is the velocity of the first asteroid

is the mass of the second asteroid

is the velocity of the second asteroid

(3)

After the crash:

(4)

Where:

is the final velocity of the first asteroid

is the final velocity of the second asteroid

(5)

Substituting (3) and (5) in (1):

(6)

Grouping similar terms:

(7)

Then:

(8) This means  must be multiplied by 1.16 km/s in order to make this side of the equation equal to .

This one is leisure for people with common sense. Yellow is an assortment of two of the rudimentary colors, red and green. Yellow appears yellow because red light is being imaged in our eyes, so that's one thing. Green reflections are capable of being enthralled by the shirt; hopefully, this should be meticulous adequate for you to have a basic understanding of this "phenomenon". Cheers!

A yellow T-shirt appear yellow to human eye because it reflects both red and green lights and our eye detects it as a combination of two fundamental colors (red and green), which is yellow.

Color is a perception. Our eyes sense something (the sky, for instance), and information is transferred from our eyes to our brains informing us that it is a particular color (blue). Different combinations of wavelengths of light are reflected by objects. When our brains detect certain wavelength combinations, they transform them into the phenomena known as color.

There has three fundamental color: red, blue and green. Red and green lights are combined to create yellow light. If a shirt reflects both red and green light, it appears yellow to human eyes. These two fundamental colors of light must be present in the incident light for red and green light to reflect yellow light to human mind.

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The disk will come to a stop after about 5.5 seconds.

The disk's initial kinetic energy is a combination of rotational and translational energy. As it begins to move up the slope, it experiences an opposing force of friction that acts in the opposite direction of the motion. This force causes the disk to decelerate and ultimately come to a stop.

The amount of frictional force acting on the disk depends on the normal force, which is equal to the gravitational force acting on the disk. By using conservation of energy principles, we can calculate the work done by friction to bring the disk to a stop.

This work is equal to the change in kinetic energy of the disk. Using the work-energy theorem, we can then find the time it takes for the disk to stop. In this case, the disk will come to a stop after about 5.5 seconds.

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The 2 meters refers to the wavelength of the radio signals.

In ham radio, the 2-meter wavelength band refers to the portion of the radio spectrum that has a wavelength of approximately 2 meters (roughly 144-148 MHz). This is a popular frequency range for amateur radio operators, as it allows for both local and long-distance communication, depending on the specific mode and equipment used.

The 2-meter band is part of the VHF (Very High Frequency) spectrum, which has various applications such as FM radio, television broadcasts, and amateur radio. Ham radio operators use the 2-meter band for different modes of communication, including voice, digital, and Morse code. The 2-meter wavelength enables them to establish a connection with other radio operators locally, regionally, or even internationally via satellite or other propagation methods, such as tropospheric ducting or sporadic E propagation.

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Answer:

650N

Explanation:

f = ma

130kg x 5 m/s^2 = 650N

Answer:

the voltage is the same in all parallel components because by definition you have connected them together with wires that are assumed to have negligible resistance. the voltage at each end of the wire is the same ( ideally ) . so all the components have to have the same voltage.

Answer:

Approximately \(2.69\; {\rm A}\).

Explanation:

Ensure that all values are measured in standard units. Charge should be measured in coulombs, while time should be measured in seconds:

\(\begin{aligned}t &= 3.0\; {\rm hr} \times \frac{3600\; {\rm s}}{1\; {\rm hr}} = 10800\; {\rm s}\end{aligned}\).

Electric current \(I\) is the rate of flow of electric charge.

In order to find the electric current, divide electric charge \(q\) by the time \(t\) required to transfer these charge. If charge \(q\!\) is measured in coulombs and time \(t\!\) is measured in seconds, the unit of current \(I\)would be amperes:

\(\begin{aligned}I & = \frac{q}{t} \\ &= \frac{29000\; {\rm C}}{10800\; {\rm s}} \approx 2.69\; {\rm A}\end{aligned}\).

Answer: 0

Explanation:

hope this helps!

Simply multiplying the appliance's wattage by the number of hours it is used each day will accomplish this.

You must divide this figure by 1,000 since you require kilowatt- hours and this gives you watt-hours (a kilowatt equals 1,000 watts). The Energy Information Agency (EIA) estimates that the typical American home uses 10,715 kilowatt-hours (kWh) of energy annually. It takes 29,360 watts (W) per day to power a home for a day, which can be divided by 24 to get an average of 1,223 W. According to data from industry watchdog Ofgem from January 2022, the typical dual fuel variable tariff cost £1,277 per year, or £106.41 per month.

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Explanation:

Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. ... Radio is a form of electromagnetic radiation just like light and can therefore travel through the vacuum of space just fine

Answer:

Fprce is an extranal agency which changes or tends to change the state of rest or uniform motion in a straight line ......

The force with which earth pulls every objects towards its centre is called gravity ..

Answer:

Force is an external agency which changes or tends to change the state of rest or uniform motion in a straight line, the force with which earth pulls every objects towards its center is called gravity

Explanation:

The quantization of energy levels and the restrictions on electron transitions in quantum mechanics ensure the stability of atoms. Electrons occupy specific energy levels and are confined to certain orbits around the nucleus, maintaining a balance between the attractive force of the nucleus and the centrifugal force of their motion.

In classical mechanics, atoms are described as miniature solar systems with electrons orbiting around the nucleus.

According to classical electromagnetic theory, an accelerated charged particle emits electromagnetic radiation.

Therefore, in the classical view, orbiting electrons would continuously lose energy and eventually spiral into the nucleus, causing atoms to collapse.

Quantum mechanics, on the other hand, provides a different perspective on the stability of atoms.

It introduces the concept of wave-particle duality, where particles like electrons can exhibit both particle-like and wave-like behavior.

In quantum mechanics, electrons are described by wave functions, which represent the probability distribution of finding the electron in different regions around the nucleus.

The key idea in quantum mechanics is that electrons can only occupy specific energy levels, or quantized states, within the atom. These energy levels are distinct and separated by energy gaps.

Electrons can transition between these energy levels by absorbing or emitting discrete amounts of energy, corresponding to the emission or absorption of photons.

The stability of atoms in quantum mechanics arises from the concept of the ground state.

The ground state is the lowest energy level that an electron can occupy, and it represents the most stable configuration for the atom. In this state, the electron does not emit any radiation and does not spiral into the nucleus.

The quantization of energy levels and the restrictions on electron transitions in quantum mechanics ensure the stability of atoms.

Electrons occupy specific energy levels and are confined to certain orbits around the nucleus, maintaining a balance between the attractive force of the nucleus and the centrifugal force of their motion.

Overall, quantum mechanics resolves the classical problem of instability in atoms by introducing the concept of quantized energy levels, which govern the behavior of electrons and prevent their collapse into the nucleus.

This understanding of atomic stability forms the basis for our modern understanding of the structure of matter and the functioning of atoms in chemical reactions.

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Answer: Movement in which all positions of both the waves rotate around the directions at right angles to the axis of the wave's movement.

Explanation: Hope this help

The error in the estimate of acceleration due to gravity (g) is approximately -0.02π(T√(Lg)).

The formula for the period of a simple pendulum is given by:

T = 2π√(L/g)

Where:

T is the time period of the pendulum

L is the length of the pendulum

g is the acceleration due to gravity

Taking the derivative of the equation with respect to g:

d(T)/d(g) = -πL/(T√(L/g))

Using the concept of error propagation, the relative error in g (Δg/g) can be calculated as:

(Δg/g) = (ΔT/T) / (d(T)/d(g))

Substituting the given values into the equation:

(Δg/g) = (0.02) / (-πL/(T√(L/g)))

(Δg/g) = -0.02π(T/g)(√(L/g))

To obtain the absolute error in g, we can multiply the relative error by the estimated value of g:

Error in g (Δg) = (Δg/g) * g

Error in g (Δg) = (-0.02π(T/g)(√(L/g))) * g

Error in g (Δg) = -0.02π(T√(Lg))

Note that the negative sign indicates a decrease in the estimate of g due to the errors in length and time period.

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The effective sensing range of a proximity sensor is determined by two factors: the size and dielectric properties of the object. The size of the object determines how close it needs to be to the sensor in order to be detected, while the dielectric properties determine how well it interacts with the electromagnetic field produced by the sensor.

Generally, larger objects or those with higher dielectric constants will have a longer sensing range, while smaller objects or those with lower dielectric constants will have a shorter range. However, other factors such as sensor sensitivity and environmental conditions may also affect the effective sensing range of a proximity sensor.

A typical sensing range for capacitive proximity sensors is from a few millimeters up to about 1 in. (or 25 mm), and some sensors have an extended range up to 2 in. Where capacitive sensors really excel, however, is in applications where they must detect objects through some kind of material such as a bag, bin, or box.

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Answer:

40%

Explanation:

The efficiency of a system is calculated as the ratio of the useful power output to that of the input power.

Efficiency = useful output/input x 100%

In this case, input power = 5j, useful output = 2j

Efficiency = 2/5 x 100%

                   = 40%

The efficiency of the buzzer is, therefore, 40%.

Answer:

I believe it is actually C

Explanation:

Matter and energy cannot be created or destroyed so A is incorrect

Since energy cannot be created, B is incorrect

while C and D both sound correct, D does not mention entering while C does so I believe C is correct. When i submit this answer into my quiz, i will add if i am right.

In the universe, all energy and matter are contained; no energy or matter enters or exits - the statement best describes why the universe could be considered an isolated system.

A thermodynamic system is said to be isolated if it cannot exchange either mass or energy with the outside world. In contrast to a closed system, energy can't move across isolated systems. Energy can move freely within and outside of closed systems; they are only closed to matter.

As both energy and matter can not exit from a universe, we can consider universe as a isolated system.

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If there is 15 g of hydrogen, only 1.3375 gram of it will react with oxygen to form  12.0375 gram of water. If there is 25 g of oxygen, it needs 3.125 gram of hydrogen to produce 28.125 gram of water. 25 gram oxygen cannot produce 110 gram of water.

The molecular masses of hydrogen, oxygen and water :

hydrogen:  2 g/mole

oxygen: 32 g/mole

water: 18 g/mole

The reaction of forming water from hydrogen and oxygen is:

2H₂ + O₂ ---> 2H₂O

Or in words:

2 moles of hydrogen + 1 mole of oxygen forms 2 moles of water.

The ratio of molecular masses:

H₂ : O₂ : H₂O = 2 x2 : 1 x 32 : 2 x 18

H₂ : O₂ : H₂O = 1 : 8 : 9

Hence, 10.7 gram Oxygen will react with:

10.7/8 x 1 = 1.3375 gram hydrogen, to produce:

10.7/8 x 9 = 12.0375 gram of water

(Note, if there is 15 g of hydrogen, only 1.3375 gram of it will react with oxygen to form  12.0375 gram of water)

25 gram of Oxygen will react with:

25/8 x 1 = 3.125 gram of hydrogen, to produce:

25/8 x 9 = 28.125 gram of water

The above stoichiometry procedures is based on law of conservation of mass, which states that the mass of each element at the product side should be equal to the mass of each element at the reactant side.

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Answer:

ya daddy is my zaddy

Explanation:

The magnitude of reaction at the beam due to the distributed load of 25 kN/m is 625 N.

The magnitude of reaction at the beam can be determined by calculating the total force exerted by the distributed load. In this case, the distributed load is given as 25 kN/m. To find the magnitude of reaction, we multiply the distributed load by the length of the beam.

Therefore, the magnitude of reaction is 25 kN/m multiplied by the length of the beam in meters. By performing the calculation, we obtain the value of 625 N as the magnitude of reaction at the beam due to the distributed load. This represents the total force exerted by the distributed load on the beam.

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