11.0 cm far from a concave mirror (radius 22.0 cm ) must an object be placed if its image is to be at infinity.
What is concave mirror?A concave mirror's reflected surface curves inward and outward from the light source. Concave mirrors are used to reflect light inward to the single focus point. Concave mirrors, in contrast to convex mirrors, produce a range of pictures depending on the object's proximity to the mirror.
Briefing:The picture will be produced at infinity if the item is retained at the focus point. Assuming that the radius of curvature is R=22.0 cm, the focal length is equal to
F = r /2
F = 22.0 / 2
F = 11.0 cm
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a body has got its mass 100 kg .calculate it's weight
Answer:
220.46 lbs
Multiply the mass by 2.205 for an approxinate result.
The answer is 220.462.
For a fixed amount of an ideal gas, an increase in the average speed of the gas molecules could cause which of the following quantities to increase?
a. Temperature only
b. Volume only
c. Pressure only
d. Volume and Pressure only
e. Temperature, Volume and Pressure
An increase in the average speed of gas molecules in an ideal gas would cause an increase in temperature, volume, and pressure (Option e).
In an ideal gas, the average speed of gas molecules is directly related to their kinetic energy. According to the kinetic theory of gases, the temperature of a gas is a measure of the average kinetic energy of its molecules. As the average speed of gas molecules increases, their kinetic energy and therefore temperature also increase. Thus, an increase in the average speed of gas molecules would lead to an increase in temperature (Option a).
When the temperature of an ideal gas increases, the gas molecules move with greater kinetic energy, leading to an increase in their speed and collisions with the walls of the container. This increased collision frequency exerts a greater force on the walls, resulting in an increase in pressure. Therefore, an increase in the average speed of gas molecules would cause an increase in pressure (Option c).
The volume of an ideal gas is not directly affected by the average speed of gas molecules. However, based on the ideal gas law (PV = nRT), if the temperature and pressure of the gas increase while the amount of gas remains constant, the volume of the gas would also increase. Hence, an increase in the average speed of gas molecules would cause an increase in volume as well (Option d).
In conclusion, an increase in the average speed of gas molecules in an ideal gas would cause an increase in temperature, volume, and pressure (Option e).
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which of the following is not an example of mechanical action? group of answer choices electrically charged beaters of the bells on the clavecin electrique digital sampling machines levers and hammers inside an acoustic piano rotors (tonewheels) of a telharmonium
Digital sampling machines are not an example of mechanical action.
What is mechanical action?
Mechanical action refers to the physical movement of mechanical components to produce a sound or perform a specific function. This can include a wide range of actions, such as the striking of hammers on strings in a piano, the rotation of tonewheels in a Hammond organ, or the movement of valves in a trumpet.
Mechanical action can also be found in other types of machinery and equipment, and tools such as engines, gears, and levers, where physical movement is used to perform a specific task or function.
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Morgan has an equal amount of Sand and Salt. They take the two piles of material and combine them together. Morgan says that this combination of Sand and Salt is a Compound. Do you agree with Morgan?
Answer: I DISAGREE with Morgan
Explanation:
A compound is made up of two or more elements which are usually chemically bonded together. Such elements can only be separated by a chemical process and not by physical processes like filtration and decantation.
Examples of compounds includes:
--> Table salt(NaCl) this is a chemical compound which contains elements such as sodium and chlorine which are chemically bonded together.
--> water(H2O): this contains elements such as hydrogen and oxygen chemically bonded together
But substances such as sand is not a compound but a mixture which contains natural deposits of silicon dioxide, small rocks and other organic substances which are not chemically bond together.
Therefore, the combination of equal parts of salt and sand will lead to the formation of a HETEROGENEOUS MIXTURE not a compound.
This is a type of mixture in that made up of different compositions.
A home that is built with windows facing south that maximizes the capture of sunlight during the fall and winter months, but also has an overhang that blocks out sunlight during the spring an summer months uses:
A home that is built with windows facing south to maximize the capture of sunlight during the fall and winter months, but also has an overhang that blocks out sunlight during the spring and summer months, utilizes a design strategy known as passive solar design or passive solar heating.
Passive solar design takes advantage of the sun's energy for heating and lighting purposes, while also incorporating elements to prevent overheating during warmer seasons. In the case of the described home, the specific features include:
South-facing Windows: By placing windows on the south side of the home, they can capture a significant amount of sunlight during the fall and winter months when the sun is lower in the sky. This allows for natural heating of the interior spaces, reducing the reliance on artificial heating systems.
Overhang or Shading Devices: The presence of an overhang or shading devices above the south-facing windows helps block direct sunlight from entering the home during the spring and summer months when the sun is higher in the sky. This prevents excessive solar heat gain, reducing the need for cooling and maintaining a comfortable indoor temperature.
The combination of these design features allows for passive solar heating in colder months and passive cooling in warmer months. It optimizes energy efficiency and enhances the comfort of the home by utilizing natural resources and reducing reliance on mechanical heating and cooling systems.
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what is the relation between liquid pressure and density of liquid
plzz fast
Explanation:
Pressure due to the weight of a liquid of constant density is given by p=ρgh p = ρ g h , where p is the pressure, h is the depth of the liquid, ρ is the density of the liquid, and g is the acceleration due to gravity
Answer:Pressure due to the weight of a liquid of constant density is given by p=ρgh p = ρ g h , where p is the pressure, h is the depth of the liquid, ρ is the density of the liquid, and g is the acceleration due to gravity.
Explanation:
A 1. 0 newton metal disk rests on an index card that is balanced on top of a glass. What is the net force acting on the disk?.
A 1.0 N metal disk rest on an index card that is balanced on the top of the glass, then the net force acting on the disk is 0 N.
What is Force?A force in physics is an effect that has the power to alter an object's motion. A mass-containing object's velocity can alter, or accelerate, as a consequence of a force. Intuitively, a push or even a pull can also be used to describe force. Being a vector quantity, a force also has magnitude and direction. The SI unit of newton is often used to measure it (N). The letter F stands for force.
As per Newton's second law's initial conception, an entity's net force is equal to the speed at which its momentum is changing over time.
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T4. Lisa uses some glue to fix a broken plate. She puts the glue under a desk lamp but the glue
doesn't dry. Then she puts the glue out in the sun and it dries. Why does light from the sun dry the
glue when light from the desk lamp does not?
a. Because the glue can take in energy from the light from the sun but not from the light from
the lamp.
b. Because light from the sun pulls energy out of the glue and light from the desk lamp does
not.
C.
Because the sun gives off a type of light that carries energy, and light from the desk lamp
does not.
d. Because light from the sun carries heat molecules, and light from the desk lamp does not.
The light from the sun dry the glue when light from the desk lamp does not because the sun gives off a type of light that carries energy, and light from the desk lamp does not.
Option c is correct.
Describe the sun?The sun emits a broad spectrum of light, including ultraviolet (UV) light, which carries more energy than visible light from a desk lamp.
When the UV light from the sun hits the glue it causes chemical reactions that result in the drying of the glue.
So we know that the light from the desk lamp may not have the right type of energy to initiate the necessary chemical reactions for the glue to dry.
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If a girl is running along a straight road with uniform velocity 1.5 m/s, what is her acceleration?
Answer:
0 m/s²
Explanation:
Acceleration is change in velocity over time. The velocity is constant, so the acceleration is 0.
The function f(x)=−0.0025x2+0.243x+3 models the path of a rocket in feet. Explain how you would use the function to determine the height the rocket was launched from, how far it traveled, and the greatest height it reached. Answer in complete sentences.
Answer:
The quadratic function models the path of the rocket. When we substitute an x value, we can determine the height in feet of the rocket.
To determine the height it was launched from, we would look at the y-intercept. This represents the starting value, as time = 0 in this point (cannot have negative time).
To determine how far the rocket traveled, we would look at the positive x-intercept of the expression. At this point, height = 0, so we can see the distance from start to finish of the rocket.
To determine the greatest height achieve, we would look at the vertex of the parabola generated from the given function. Using (-b/a, f(-b/a)), we can determine the greatest height achieved.
what is the total equivalent resistance of the circuit?
R1= 5Ω, R2= 3Ω, R3= 4Ω, R4= 1Ω, R5= 2Ω
Why would you consider Joule’s early experiments with electric motors important even though he did not
achieve his goal?
Answer:
It counts as a learning experience
Explanation:
He can learn from his mistakes and take important steps to achieve his goal In the future.
Setting objectives can lead to better direction, enhanced attention, higher levels of motivation, and increased productivity. You may change your behaviours, mindset, confidence, and daily activities by setting clear, measurable goals.
What important even though achieve his goal?More essential than monetary or material rewards is achievement. Greater personal satisfaction comes from completing the task or reaching the goal than from being praised or recognized.
Additionally, crucial is commitment. It is less probable that you will succeed if you don't give your aim your all. This enables you to change your future expectations and strategy.Feedback enables you to discover your strengths and weaknesses.
Therefore, people who are driven by achievement are always looking for methods to do things better.
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capacitor 2 has half the capacitance and twice the potential difference as capacitor 1.
The solution for the given capacitance is 0.5 .
When capacitance rises, what happens to the potential difference?If the charge is maintained constant, the capacitance will only decrease as the potential increases.The equation states that when the potential difference is smaller, capacitance is larger.
Uc = \(0.5 * C * V^2,C\) = Capacitance,V = Potential,Then\(,C1 = 2C2,V2 = 2V1\),Then \((Uc)1/(Uc)2 = (0.5 * C1 * V1^2) / (0.5 * C2 * V2^2) = 2/4 = 0.5.\)
What distinguishes capacitance from potential?
Capacitance measures the capacity to store charge, whereas electric potential assesses the capability to do work on a charge.Coulomb / Voltage (C/V), which represents the quantity of charge existing per applied voltage, is the measurement unit for capacitance.
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Help needed,
A student applies a force to a cart to pull it across the gym at a constant speed during a
physics lab. A force of 22.4 N is applied to pull a loaded cart 10 meters. Determine the work
done upon the cart.
Answer:
224 J
Explanation:
Step one:
given data
Force applied = 22.4 N
distance = 10 meters
Required:
the work done
Step two:
The expression for the work done is
WD= force*distance
substitute
WD= 22.4*10
WD= 224 J
difference between uniform velocity and variable velocity
Explanation:
when a body covers equal distance in equal interval of timein a specific direction it is said to have uniform velocity . when a body covers unequal distance in equal interval of time in a specified direction , it is said to have variable velocity .The Earth’s radius is 6.4 x 10^6 m and 1kg = 2.2lb. What is the force that the Earth exerts on you?
Using what you found out in question 1, what is the force that you exert on the Earth?
What would the Sun’s force be on the Earth, if our planet were twice as far from the Sun as it is now?
How does that force (from number 3) compare to the force from the Sun at our present location?
The force the earth exerts on a person that is 1 kg is 9.8 N.
The force the person exert on earth is 9.8 N.
If our planet were twice as far from the Sun as it is now, the Sun’s force on the Earth will be quarter the initial value.
Force the Earth exerts on you
The force the earth exerts on you is calculated as follows;
F = mg
where;
g is the acceleration due to gravity of EarthF = 1 kg x 9.8 m/s²
F = 9.8 N
Thus, the force the earth exerts on an object that is 1 kg is 9.8 N.
Also, based on Newton's third law of motion, the force the exerts on you is equal to the force you exert on Earth.
Force between the Earth and SunF = GmM/R²
where;
m is mass of EarthM is mass of the sunG is gravitation constantR is the distance between the sun and the earthF = (6.67 x 10⁻¹¹ x 5.97 x 10²⁴ x 1.98 x 10³⁰) / (150.23 x 10⁹)²
F = 3.5 x 10²² N
When our planet is twice as farF = GmM/(2R)²
F = GmM/(4R²)
F = ¹/₄GmM/R²
Thus, if our planet were twice as far from the Sun as it is now, the Sun’s force on the Earth will be quarter the initial value.
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(a) What magnitude force is required to give a ¬helicopter of mass 2M an acceleration of 0.10 g upward?
(b) What work is done by this force as the helicopter moves a distance h/2 upward?
(a) The magnitude of force required to give a helicopter of mass 2M an acceleration of 0.10 g upward is 1.962M N.
(b) The work done by this force as the helicopter moves a distance h/2 upward is 0.981M h Joules.
(a) To find the force required to give the helicopter an upward acceleration of 0.10 g, we can use the following equation:
Force (F) = Mass (m) × Acceleration (a)
The acceleration due to gravity (g) is approximately 9.81 m/s². Therefore, 0.10 g is equal to 0.10 × 9.81 m/s², which is 0.981 m/s².
The helicopter's mass is given as 2M. So, we can plug the values into the equation:
F = 2M × 0.981 m/s²
F = 1.962M N (Newtons)
So, the magnitude of the force required is 1.962M N.
(b) To find the work done by this force as the helicopter moves a distance of h/2 upward, we use the equation:
Work (W) = Force (F) × Distance (d) × cos(θ)
Since the force is acting vertically upward and the helicopter is moving in the same direction, the angle (θ) between the force and the distance is 0°, and the cosine of 0° is 1.
The force (F) is 1.962M N and the distance (d) is h/2. Therefore:
W = 1.962M N × (h/2) × 1
W = 0.981Mh J (Joules)
The work done by this force as the helicopter moves a distance h/2 upward is 0.981Mh Joules.
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A van moves with a constant speed of 20 miles per hour. How far can it travel in 3 1/2 hours
PLS HELP DUE IN 1 HOUR
Answer: A
Explanation:
Which of the following is an example of Newton's Third Law of Motion?
a. a person sliding to the right as a car turns left
b. a boy pulling a sled
c. gasses pushing a rocket forward
d. a hockey puck sliding across the ice
Answer:
C. gasses pushing a rocket forward
Explanation:
a tradeoff faced when deciding how to generate electricity and whether to use wind power is ______.
A tradeoff faced when deciding how to generate electricity and whether to use wind power is the variability and intermittency of wind as a renewable energy source.
A renewable energy source known as wind power uses wind turbines to produce electricity. However, there is a major trade-off due to wind fluctuation. The presence and strength of the wind can change at different times of the day, during the seasons, and in various geographical areas.
Due to this variability, power generation may fluctuate, making it difficult to maintain a steady and dependable electrical supply. Additional factors must be considered to handle this trade-off.
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True or False
1. Scientists have complete knowledge of atoms and this knowledge can never change?
For each beaker, determine how much the temperature changed in the first 100 seconds and how much it changed between 500 and 600 seconds. Compare this to the temperature difference between the beakers at the start of each interval. Value0–100 s interval500–600 s intervalBeaker A temperature changeBeaker B temperature changeTemperature difference between Beaker A and Beaker B at 0 seconds. Temperature difference between Beaker A and Beaker B at 500 seconds
Calculate the temperature change in each beaker during the course of the first 1 min and the next 500 to 600 seconds. Comparing this to
What does temperature in physics actually mean?
Many people have an obsession with checking a forecast to find out the day's temperature. The average kinetic energy of each molecule in a substance is measured by its temperature. Despite the fact that the two variables are closely related, it differs from heat.
What distinguishes an object's energy from its temperature?
As was mentioned, an object's energy is extensive while its temperature is intense. The block may still be hotter even if the liquid has more energy. (2) "Two things with equal heat in thermal equilibrium" improper use of heat. Energy is transferred by heat. Heat does not 'exist' in an object.
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A man holds a book near a bookcase at the level of bookshelf B. Bookshelf A is above B. Bookshelf C is below B. Joshua is holding a book near shoulder-height. Use the drop-down menus to indicate what happens to the gravitational potential energy of the book if he places it on each shelf. Shelf A shelf B shelf C.
Placing the book on Shelf A increases its gravitational potential energy. Placing the book on Shelf B does not change its gravitational potential energy.
If Joshua places the book on each shelf, the gravitational potential energy of the book will change as follows: Shelf A: The book will be lifted to a higher position, increasing its gravitational potential energy.
Shelf B: The book will be at the same level as the bookshelf, so there will be no change in its gravitational potential energy.
Shelf C: The book will be lowered to a lower position, decreasing its gravitational potential energy.
Placing the book on Shelf C decreases its gravitational potential energy.
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Answer:
Increase
stays the same
decrease
Explanation:
did it in edge
what is the two example of velocity
how do animal use upthrust in their daily life
Animals use upthrust or buoyancy in a variety of ways in their daily lives. Upthrust is the force that is exerted in a fluid such as water or air when a body is inmmersed in it.
Upthrust explained
Animals use upthrust or buoyancy in a variety of ways in their daily lives. Upthrust is the force that is exerted in a fluid such as water or air when a body is inmmersed in it.
Some animals such as fish use upthrust to move and maintain their position in water. Fish have swim bladder which help them to maintain buoyancy.
Some birds such as pelicans use upthrust to dive and swim in water. They have air sacs filled with air which help to reduce buoyancy and also help their buoyancy.
Insects use upthrust to move in the air.
Overall, animals use upthrust to move and maintain their position.
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Describe an experiment to show that the force pulling an object increase
with the increase in the mass of the object.
Answer:
"Acceleration due to gravity" whereby Force and Mass are directly proportional
Explanation:
F=ma
Answer:
just use the magnet experience
Explanation:
it shows how force pulling an object increase
with the increase in the mass of the object.
The vibrational frequency of I2 is 208cm−1 At what temperature will the population in the first excited state be half that of the ground state?
The temperature at which the population in the first excited state of I2 is half that of the ground state is 1,400 K.
The population of the first excited state of a molecule at a given temperature is,
N_1/N_0 = exp(-ΔE/kT)
where N_1 and N_0 are the populations of the first excited state and ground state, respectively, ΔE is the energy difference between the two states (in joules), k is the Boltzmann constant (1.38 x 10^-23 J/K), and T is the temperature (in Kelvin).
To find the temperature at which the population in the first excited state is half that of the ground state for I2, we need to solve for T when N_1/N_0 = 1/2. We know that the vibrational frequency of I2 is 208 cm^-1, which corresponds to an energy difference of,
ΔE = hcν = (6.626 x 10^-34 J s)(3.00 x 10^8 m/s)/(208 x 100 cm^-1) = 1.596 x 10^-20 J
1/2 = exp(-ΔE/kT)
ln(1/2) = -ΔE/kT
T = -ΔE/(k ln(1/2)) = (1.596 x 10^-20 J)/(1.38 x 10^-23 J/K ln(1/2)) = 1,400 K
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Are these right? Just need you to confirm or tell we what I got wrong. Thanks
Answer:
yes it is write
Explanation:
what is the correct tight asymptotic bound for T(n) in 1,2,3 where T(1)=c ?
T(n) = 10T(n/10)+100n
T(n) =T(n/10)+100n
T(n) = T(n/10)+100
The correct tight asymptotic bound for T(n) in 1, 2, 3 where T(1)=c is Θ(n log n).
To find the tight asymptotic bound of T(n), we will use the Master Theorem. So, let's take a look at each recurrence relation:
1. T(n) = 10T(n/10)+100nApplying the Master Theorem: a = 10, b = 10, f(n) = 100nlogb a = log10 10 = 1 Since f(n) = Θ(n) = Θ(n1), Case 2 of the Master Theorem applies. The solution, therefore, is Θ(n log n).
2. T(n) = T(n/10)+100n Here, a = 1, b = 10, f(n) = 100nlogb a = log10 1 = 0 Since f(n) = Θ(n0) = Θ(1), Case 1 of the Master Theorem applies. The solution, therefore, is Θ(n).
3. T(n) = T(n/10)+100 Here, a = 1, b = 10, f(n) = 100logb a = log10 1 = 0 Since f(n) = Θ(1) = Θ(n0), Case 2 of the Master Theorem applies. The solution, therefore, is Θ(log n).Therefore, the correct tight asymptotic bound for T(n) in 1, 2, 3 where T(1)=c is Θ(n log n).
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Let's use the Master Theorem to find the asymptotic tight bound for each of the three recurrence relations given in the problem statement.
1. T(n) = 10T(n/10) + 100n Here, a = 10, b = 10, and f(n) = 100n. We can calculate the value of logb a as follows: log10 10 = 1 Since f(n) = Θ(n1), we can apply Case 2 of the Master Theorem and get: T(n) = Θ(n log n)Therefore, the correct tight asymptotic bound for T(n) in the first case is Θ(n log n).
2. T(n) = T(n/10) + 100n Here, a = 1, b = 10, and f(n) = 100n. We can calculate the value of logb a as follows: log10 1 = 0 Since f(n) = Θ(n1), we can apply Case 1 of the Master Theorem and get: T(n) = Θ(n)Therefore, the correct tight asymptotic bound for T(n) in the second case is Θ(n).
3. T(n) = T(n/10) + 100 Here, a = 1, b = 10, and f(n) = 100. We can calculate the value of logb a as follows: log10 1 = 0 Since f(n) = Θ(1), we can apply Case 2 of the Master Theorem and get: T(n) = Θ(log n) Therefore, the correct tight asymptotic bound for T(n) in the third case is Θ(log n). Hence, the three asymptotic tight bounds for T(n) are Θ(n log n), Θ(n), and Θ(log n), respectively.
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