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3 years ago

I need help on #9 (it's side ways sorry...)

Physics

2 answers:

Gennadij [26K]3 years ago

8 0

<span>All of these are directly proportional to each other, meaning that if one goes up or down, they all do the same.
So if the temperature increases so does the heat. If the heat increases then so does the thermal energy. If the temperature goes up then so does the thermal energy. ETC...</span>

dmitriy555 [2]3 years ago

8 0

Temperature-Amount of heat or coldness an item has measured in degrees. the object.
Heat- Given off from thermal energy.
Thermal energy- what is given off when energy is lost.
Law of Conservation of Energy- Energy can neither be created or destroyed, it can only be transformed from one form to another.

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Which of the following has the greatest amount of kinetic energy a)slice of pizza b)a person at the top of the stairs c)wind d)a

Talja [164]

Answer:

c)wind

Explanation:

Wind from the given choices will have the greatest amount of kinetic energy.

Kinetic energy is the energy due to motion of a body. It is different from the energy at rest in a body.

Wind is air in motion.
Wind energy is a form of kinetic energy in motion.

A book on a table, a slice of pizza and a person at the top of the stairs are all at rest and will possess potential energy.

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3 years ago

During a supernova, the outer layers of a star are blown off and the star's core shrinks down by a factor of 10,000 or more to f

Lana71 [14]

Answer:

a. the core will spin faster.

Explanation:

By law of conservation of angular momentum

(mvR)i= (mvR)f

m= mass of star

v= speed of star

R= radius of star

i= initial

f= final

since, size(R) of the star is reduced by factor of 10,000 and mass remains the same, the velocity must increase by the same factor to keep the angular momentum conserved.

Hence, a. the core will spin faster.

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3 years ago

A red car passes a blue car. Which is true?

Marrrta [24]

D. The red car is moving faster than the blue car

4 0

3 years ago

A 1,000 kg car is driving on a 15 m high bridge at 5 m/s. What is the kinetic energy of the car?

yanalaym [24]

Answer:

$KE=12,500J$

Explanation:

The formula for kinetic energy is:

$KE = \frac{1}{2}mv^2$

We can plug in the given values into the equation:

$KE = \frac{1}{2}*1000kg*(5m/s)^2$

$KE = 500kg*25m^2/s^2$

$KE=12,500J$

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2 years ago

When the forces acting on a particle are resolved into cylindrical components, friction forces always act in the

Aleksandr [31]

Answer:

Tangential

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3 years ago