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3 years ago

Which car has the most kinetic energy ??

Physics

2 answers:

zaharov [31]3 years ago

8 0

it's C

because the faster an object moves the more kinetic energy it has.

gregori [183]3 years ago

6 0

Kinetic Energy is defined by 1/2 times the mass times the velocity squared.

KE = (1/2)mv2

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A 2 kilogram object is moving horizontally with a speed of 4m/s. How much net force is required to keep the object moving at thi

zhenek [66]

IF there is no friction against the moving object (impossible in real life),
then it takes NO force to keep the object moving at a constant speed
in a straight line.

It takes force only to CHANGE the object's motion ... speed it up, slow
it down, or change its direction.

4 0

4 years ago

During a power outage, people use generators. What does a geneszitor dia?

stepladder [879]

Kinetic to Electric
Hope this helped good luck!

7 0

3 years ago

Light of wavelength 656 nm and 410 nm emitted from a hot gas of hydrogen atoms strikes a grating with 5300 lines per centimeter.

padilas [110]

Answer:

$20.32^{\circ}$ and $44.08^{\circ}$

$12.56^{\circ}$ and $25.77^{\circ}$

Explanation:

$\lambda$ = Wavelength

$\theta$ = Angle

m = Order

Distance between grating is given by

$d=\dfrac{1}{5300}\\\Rightarrow d=0.0001886\ \text{cm}$

$\lambda=656\ \text{nm}$

We have the relation

$d\sin\theta=m\lambda\\\Rightarrow \theta=\sin^{-1}\dfrac{m\lambda}{d}$

m = 1

$\theta=\sin^{-1}\dfrac{1\times 656\times 10^{-9}}{0.0001886\times 10^{-2}}\\\Rightarrow \theta=20.35^{\circ}$

m = 2

$\theta=\sin^{-1}\dfrac{2\times 656\times 10^{-9}}{0.0001886\times 10^{-2}}\\\Rightarrow \theta=44.08^{\circ}$

The first and second order angular deflection is $20.32^{\circ}$ and $44.08^{\circ}$

$\lambda=410\ \text{nm}$

m = 1

$\theta=\sin^{-1}\dfrac{1\times 410\times 10^{-9}}{0.0001886\times 10^{-2}}\\\Rightarrow \theta=12.56^{\circ}$

m = 2

$\theta=\sin^{-1}\dfrac{2\times 410\times 10^{-9}}{0.0001886\times 10^{-2}}\\\Rightarrow \theta=25.77^{\circ}$

The first and second order angular deflection is $12.56^{\circ}$ and $25.77^{\circ}$ .

4 0

3 years ago

It takes 56.5 kilojoules of energy to raise the temperature of 150 milliliters of water from 5°C to 95°C. If you

natka813 [3]

If 56.5kJ are needed to raise the temp by 90°C and if the heater is 60% efficient that means that:
60% X y = 56.5kJ
where y is the electrical energy in kJ that the heater will use.
y = 94.2kJ

6 0

3 years ago

If I exert a 203 N force on a 58 kg box, what will the acceleration of the box be?

Anit [1.1K]

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

$a = \frac{f}{m} \\$

m is the mass

f is the force

From the question we have

$a = \frac{203}{58} = \frac{7}{2} \\$

We have the final answer as

Hope this helps you

7 0

3 years ago