Which object has the most thermal energy?

What is the acceleration experiance by a car that takes 10s to reach 27m/s from rest

lina2011 [118]

Magnitude of acceleration = (change in speed) / (time for the change).

Change in speed = (27 - 0) = 27 m/s
Time for the change = 10 s

Magnitude of acceleration = (27 m/s) / (10 s) = 2.7 m/s² .

4 0

3 years ago

Match the following:

joja [24]

Explanation:

1. study of conversion of heat to mechanics → thermodynamics

A branch of physical science which deals with heat and other forms of energy.

2. The Law of Conservation of Energy → first Law of Thermodynamics

Energy cannot be created nor be destroyed. According to first law of thermodynamics total energy of the system is always constant.

3. Result of applied energy → work

Work is the way of system to release its energy.

4. Principle that states that in any energy transformation some energy is dissipated as heat → Second Law of Thermodynamics

5. energy of motion → kinetic energy

Kinetic energy is defined as energy possessed by the body due to its motion.

6. work/displacement → force

Work is product of force and displacement.

$Work=Force \times displacement$

$Force=\frac{Work}{displacement}$

7. power · time → energy

Power is defined energy per unit time.

$Power=\frac{Energy}{Time}$

$Energy=Power\times Time$

8. Device that transforms heat energy into mechanical energy → heat engine

heat engine is a device which converts the heat energy which is released due to combustion of fuel into a useful work that is mechanical energy.

9 . Energy due to position → potential energy

Potential energy is defined as energy possessed by the body due to its position.

10. efficiency of a heat engine unit of heat → calorie

11. Measure of molecular motion → Temperature

Kinetic energy is directly proportional to temperature.

Greater the motion more will be the kinetic energy and with more will be the temperature.

12. Heat given off by a liquid with no change in temperature → latent heat of fusion

Latent heat of fusion is defined as heat released by 1 mole of substance when it under goes phase change that is from solid to liquid.

13. Motion within solids → vibrational motion

Vibrational motion is the motion in which particle oscillates from its mean position.

14. Phase of matter on the sun → plasma

Plasma is hot ionized gas with equal number of positive and negative ions. Due to high temperature of sun most the gas are in the plasma state.

8 0

3 years ago

How fast and in what direction must galaxy A be moving 17 an absorption Line found at 500 nm for a stationary galaxy 1s shifted

emmainna [20.7K]

Answer:

v = 0.22 c and wavelength is decrease so galaxy A is move away from stationary galaxy

v = 0.095 c and wavelength is increase so galaxy B come toward stationary galaxy

Explanation:

Given data

found = 500 nm

shifted A = 400 nm

shifted B = 550 nm

to find out

How fast and in what direction is galaxy

solution

we use here formula that is

(λ) shifted = √(1-β / 1+β) (λ)found

1-β / 1+β = (4/5)² ..................1

1-β / 1+β = 16 / 25

β = 0.22

v/c = 0.22

v = 0.22 c

here wavelength is decrease so galaxy A is move away from stationary galaxy

and

here according to equation 1

and we use shifted 550 nm

so

1-β / 1+β = (5.5/5)²

1-β / 1+β = 30.25 / 25

β = 0.095

so v/c = 0.095

v = 0.095 c

here wavelength is increase so galaxy B come toward stationary galaxy

3 0

2 years ago

Microwave ovens emit microwave energy with a wavelength of 13.0 cm. what is the energy of exactly one photon of this microwave r

zysi [14]

First, let's calculate the frequency of this radiation, which is given by:
$f= \frac{c}{\lambda}$
where c is the speed of light and $\lambda$ is the photon wavelength. For this radiation, photons have wavelength of
$\lambda=13.0 cm=0.13 m$
Therefore their frequency is
$f= \frac{c}{\lambda}= \frac{3 \cdot 10^8 m/s}{0.13 m}=2.3\cdot 10^9 Hz$

The energy of a photon with frequency f is given by
$E=hf$
where h is the Planck constant. By using the frequency we found before, we find the energy of a single photon of this radiation:
$E=hf=(6.6 \cdot 10^{-34} Js)(2.3 \cdot 10^9 Hz)=1.52 \cdot 10^{-24} J$

4 0

3 years ago

Read 2 more answers

A bus is moving with the velocity of 30m/s. Calculate the distance covered by the bus in 15 seconds.

lesya [120]

450 miles
1- 30x15=450

3 0

2 years ago