PHYSICS HIGH SCHOOL

shelly starts from rest on her bicycle at the top of a hill. After 6.0s she has reached a final velocity of 14m/s. what is shellys acceleration.

Answers

Answer 1

Answer:

Answer:

Acceleration, $a=2.33\ m/s^2$

Explanation:

It is given that,

Initial speed of Shelly, u = 0

After 6 seconds, she has reached a final velocity of 14 m/s, v = 14 m/s

We need to find the acceleration of Shelly. The formula to find the acceleration is given by :

$a=(v-u)/(t)$

$a=(14\ m/s-0)/(6\ s)$

$a=2.33\ m/s^2$

So, the acceleration of Shelly's is $2.33\ m/s^2$ . Hence, this is the required solution.

Answer 2

Answer: divide 14 by 6 and there is your answer with the unit of m

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What two factors determine the streghth of the force of gravity between tow object?

Answers

1). the product of the masses of the two bodies

2). the distance between their centers of mass

I a liter jar contains 0.5 moles of gas at a pressure of 2 ATM what is the temperature of the gas

Answers

Answer:

The temperature of the gas is 48.75 Kelvin.

Explanation:

Using the ideal gas equation as shown

PV = nRT where;

P is the pressure of the gas in ATM

V is the volume of the gas

n is the number of moles

R is the ideal gas constant

T is the temperature in Kelvin

From the formula, $T = (PV)/(nR)$

Given the following parameters V = 1litre, n = 0.5moles. pressure = 2ATM

R = 0.08206 atm L/molK

On substituting to get the temperature we have:

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Water behind a dam has a certain amount of stored energy that can be released as the water falls over the top of the dam. It may be enough energy to turn a mill wheel or an electricity-generating turbine. Choose the term that best describes the type of energy stored in the water at the top of the dam. potential energy
kinetic energy
mechanical energy

Answers

Answer:

The answer is potential energy

Explanation:

The potential energy is the energy possessed by a body by virtue of it position

For example the water at the top of the dam is being held at a height h above the bottom of the dam

Then the potential energy

PE= weight of the water* the height

PE= m*g*h

Which type of thermal energy transfer does a wrapping of cotton or plastic reduce the most? O A. Radiation O B. Conduction O C. Convection O D. Translation

Answers

Answer:

RADIATION

Explanation:

JUST TOOK IT ON APEX

Answer: Translation

Explanation:

Apex

Thanks

What happens to the energy that is lost when water freezes

Answers

Water from a liquid state hasinternal energy in them that defines the translational and rotational energy ofthe molecules of water. However, when water freezes, it slowly turns into solidphase and therefore lesser temperature is applied to freeze the watermolecules. The energy that is lost in the liquid is transferred to the solidstate of the water. Even though there is little or no movement of watermolecules in the solid state, there is still internal energy of the water.

A box containing a piece of wood and enough air to burn the wood is measured and found to have a mass of 1.5 kg. If the wood is burned and none of the smoke, ashes, or hot gases are allowed to leave the box, then how will the mass of the box compare to the mass before burning? Will it be more, less, or the same? A. More B. Less C. The same

Answers

Answer: C, the same

Explanation:

This is a practical use of the concept of conservation of mass. Mass cannot be created or destroyed, so if you start with 1.5 kg, as long as you dont lose any (which it says you don't) you will end with 1.5kg.

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