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10_Phys Summative Unit 2 Trim 2

Last updated about 6 years ago

35 questions

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Energies and the thermal physics.

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Question 35

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The measure of energy transfer that occurs when an object is moved over a displacement by an external force in the same direction

Work

Kinetic Work Energy

Lifting an object with Potential Energy

Kinetic Energy

Write the equation of conservation of energy:

Ek  = GPE + Ep

Ek  = GPE

Ek  + GPE =  Ek + Ep

Ek  = GPE + Ek

Find the equation of conservation of energy for this problem:

EK = EP + GPE

EK = EP

GPE = EP

GPE = EK

Before the trolley is moving, Find all the possible initial energies in both bodies:

GPEM + GPEm

GPEM

EKM + GPEm

GPEm

The trolley moved and right before object m hits the ground, What are the final energies?

EK m + EK M

EKM

EK M + ∆Qm

GPEM + EK M

The capacity for doing work.

Heat

Unbalanced force

Kinetic Energy

Energy

GPE is the ________ an object has due to its position above a relative ground.

displacement

work

distance

energy

___ is an energy stored as a result of deformation of an elastic object

Spring Constant

Force of Spring

Elastic Potential Energy

Elastic Spring Constant

____ is the total of the potential energy between molecules and their random kinetic energy.

Internal Heat

Internal Energy

Internal Work

Latent Heat

In Ek = 1/2 m v2 ... the unit for the letter "m" is:

mass

kilograms

Newtons

Joules

The letter "k" represents

Spring Latent

Elastic Constant

Spring Elastic

Spring Constant

The work done can be like:

Change in Spring Constant

Change of Force

Change in Energy

Change in Velocity

The Internal Energy here is

Small Random Kinetic Energy and large Potential Energy

Just Random Kinetic Energy

Just Random Kinetic Energy and small Potential Energy

Large Random Kinetic Energy and small Potential Energy

Temperature is:

Average Internal Energy of Molecules

Average Random Energy of Molecules

Average Potential Energy of Molecules

Average Randome Kinetic Energy of Molecules

The bowl that is on the right hand of the girl will ...

gain energy because the ice will freeze.

lose energy because the ice will melt.

gain energy because the ice will melt.

lose energy because the ice will freeze.

Heat is

Transfer of Random Kinetic Energy

Transfer of potential energy

Transfer of internal energy

Transfer of thermal energy

The heat will only flow from ...

Low Temperature object to Higher temperature object.

High Temperature object to lower temperature object.

The type of transfer of Heat is ...

Convection, because is in contact the metal and the fluid.

Conduction, because is in contact with the metal and the liquid.

Conduction, because is using the fluids

Convection, Because is using the fluids.

What should be the specific heat capacity (c) of the handle?

Low "c", takes a short time to change 1 ºC in 1 kg

High "c", takes a short time to change 1 ºC in 1 kg

High "c", takes a lot of time to change 1 ºC in 1 kg

Low "c", takes a lot of time to change 1 ºC in 1 kg

Melting and Evaporation. The characteristic they have in common is ...

Both need the same Potential Energy of molecules

Both change the Average Random Kinetic Energy

Both change the Potential Energy of molecules

Both need different temperature

is the process where it breaks the chemical bonds

Melting

Evaporation

Freezing

Condensation

is the process where molecules used to be fixed but now are flexible.

Condensation

Freezing

Evaporation

Melting

If there is friction in one of the sections of the path, Where must be the section used to stop the sliding object?

h

A - h

B - C

A - B

What is the energy needed in the melting process?

d

b

c

a

e

What is the energy needed in the condensation process?

e

c

d

a

b

What is the energy needed to change the average random kinetic energy in the gas?

b

a

d

c

e

What is the energy needed to change the average random kinetic energy in the solid?

e

b

d

a

c

What is the energy needed to break the chemical bonds?

c

d

b

a

e

What is the energy needed to melt ice 0ºC to water liquid 0ºC?

a

a + c

c

d

b + d

The heat needed to convert ice -20ºC to liquid water 0ºC

a + e

a + d

d + e

d + b

The heat needed to convert ice 0ºC into gas at 100ºC

d + c + a

d + b + c

d + b + e

d + c + e

The heat needed to convert liquid at 0ºC into a gas at 100ºC.

d + a

b + d

b + e

d + e

The heat needed to convert ice at 0ºC into a gas at 150ºC.

d + a + e + b

d + b + e + a

d + a + e + c

d + b + e + c

The heat needed to convert liquid at 0ºC into gas at 150ºC.

b + e + c

b + e + d

d + b + c

d + b + a

How much is the weight of the box?

60 N

60 x 35º

60 x 9.81

60 kg