### Temperature Heat & Energy – Physics

This Physics quiz is about temperature heat and energy.

When no air resistance acts on a fast moving baseball, its acceleration is

a. Due to a combination of constant horizontal motion and accelerated downward motion

b. Opposite to the force of gravity

** c. Downward, g**

d. At right angles

When no air resistance acts on a projectile, it’s horizontal acceleration is

a. Upward, g

** b. Zero**

c. At right angles to g

d. G

Without air resistance, the time for a vertically tossed ball to return to where it was thrown is

a. 10 m/s for every second in the air

**b. The same as the time going upward**

c. Less than the time going upward

d. More than the time going upward

In order to find the components of a vector, you should (3)

draw the vector with correct magnitude and orientation, measure the sides of the rectangle and draw a rectangle so that the vector is the diagnol

What causes heat to flow?

When two subtsances of different temperatures are in thermal contact, heat flows from the hotter substance to the cooler one

How does a thermometer measure temperature?

When a thermometer is in contact with a substance, heat flows between them until they reach the same temperature

What happens to the internal energy of a substance that takes in or gives off heat?

When a substance takes in or gives off heat, its internal energy changes

How can you determine the amount of heat transferred to a substance?

The amount of heat transferred can be determined by measuring the temperature change of a known mass of a substance that absorbs the heat

How does matter change when heated or cooled?

Most forms of matter, (solids, liquids and gases) expand when they are heated and contract when they are cooled

What is the effect of water’s high specific heat capacity on climate?

The property of water to resist changes in temperature improves the climate in many places

Why does ice float on water?

At 0 degrees celsius, ice is less dense than water, and so it floats on water

When matter gets warmer,

The atoms or molecules in the matter move faster

When a substance’s atoms and molecules move faster,

The substance expands

Fahrenheit scale freezing/boiling point of water

32, 212

Kelvin scale freezing/boiling point of water

0 = absolute zero, 0 k = -273 c

Absolute zero

When a substance has no more kinetic energy to give off, though it can still receive it

Temperature is the measurement of

The average kinetic energy in a substance

Heat

The energy that transfers from one object to another through thermal contact, because of a temperature difference between them

Matter does not contain ______, only ______

(1) heat (2) internal energy

Thermal energy

Energy resulting from heat flow

Thermal contact

When heat flows from one substance to another which it is in contact with

Thermal equilibrium

When objects in thermal contact reach the same temperature

Internal energy

A substance’s total amount of energy

Calorie (unit of heat energy)

The amount of heat required to raise the temperature of 1 gram of water by 1 degree celsius

Kilocalorie

1,000 calories

Air warms up ______ than water

Faster

In Colorado, water boils at a ______ temperature because the atmospheric pressure is ______

Lower

Thermostat

A practical application of a bimetallic strip that is used to control temperature. The strip bends as the temperature of a room changes

Solids, liquids and gases

Expand when heated and contract when cooled

The coldest temperature liquid water can have is 0 degrees celsius. True or false

At 0 degrees, liquid water begins changing phase

While a substance is changing phase,

The substance does not change temperature

How does water freeze?

At 0 degrees, water contracts as the temperature goes up until it hits 4 degrees, then expands

Projectile motion can be described by the

Horizontal and vertical components of motion

If an object is thrown across the room, the ______ it makes is a combination of constant ______, ______ motion and accelerated ______ motion,

Curve, velocity, horizontal, vertical

How does a scalar quantity differ from a vector quantity?

A vector quantity requires both magnitude and direction, but a scalar quantity only requires magnitude

The velocity of something is often the result of

The combination of two or more velocities

Tailwind

The wind that blows from the back of the plane to the front

Headwind

The wind that blows from the front of the plane to the back

What is the resultant of two perpendicular vectors? (The resultant)

The diagonal of the rectangle described by the two vectors

For any Square, the diagonal is the ______ or ______ times either of its sides

Square root of 2, 1.414

Any vector can be resolved into two ______________ at ____________ to each other

Component vectors, right angles

Components

Two vectors at right angles that add up to a given vector which they replace

Resolution

The process of determining the components of a vector

How do the perpendicular components of a vector affect each other?

They are independent of each other

Equation for the resultant

R = square root of Vc squared + Hc squared

A vector of 45° is the _______ of two vectors that are at right angles to each other

Diagonal

In terms of the labs we did, as force increased, acceleration

Increased

In terms of the labs we did, as mass increased, acceleration

Decreased

Second definition of projectile motion – anything that moves through a ______. Once in the air, they won’t produce any further ______.

Fluid, forces

Projectiles move in a ______ path

Parabolic

We always name a win from where it ____________

Comes from

If two vectors are facing the same direction, you ______ them

Add

If two vectors are facing the opposite direction, you ______ them

Subtract

Perpendicular

If two lines make a T or an L; it’s a right angled configuration

Projectile

Any object that moves through the air or space, acted on only by gravity (and air resistance, if any)

The horizontal component of motion for a projectile is just like the horizontal motion of a ____ rolling ____ along a level surface without ____.

Ball, freely, friction

The vertical component of a projectile’s velocity is like the motion for a ____ ____ object

Free falling

If you roll a ball along a horizontal surface, its velocity is ______ because no component of gravitational force acts ______

Constant, horizontally

If you drop a ball from mid air, it accelerates ______ and covers greater ____ distance each second

Downward, vertical

The combination of the ______ and the ______ components result in the variety of ______ paths that projectiles follow

Horizontal, vertical, curved

In terms of a ball launched horizontally, it moves the same ____ ____ in equal time intervals between each flash, because no ______ component of force is acting on it

Horizontal distance, horizontal

A parabola is the path traced by ______ _______ acting only in the _____ direction while moving at constant ______ velocity

projectile acceleration, vertical, horizontal

Because horizontal and vertical components are independent of each other, they will ____/____ at the ____ rate

Move, fall, same

No matter the angle at which a projectile is launched, the ______ ______ of fall beneath the idealized straight line path is the ______ for equal times

Vertical distance, same

Describe how far below an imaginary straight line path a projectile falls: The vertical distance of projectile falls below imaginary straight line path _____ continually with time it is equal to ____________

Increases, 5 m/s squared x T squared

The greater the vertical component, ____________. But, the less the horizontal component is, ____________.

The higher the path of motion, the less range

An object thrown in the air at an angle of 60° will have ____________ as an object thrown in the air at an angle of 30°. This is because they will both add up to 90°.

The same range

Ignoring air resistance, the angle of _____ will give you the greatest range

45°

With the factor of ________, the range of a projectile gets ______ and is not actually a parabola.

Air resistance, smaller

If you throw baseball in your hand, the speed you catch it with is the same as ___________

The speed you threw it with

Crosswind means

Perpendicular

Which of these expresses a vector quantity?

a. 10 kg

b. 10 kg to the north

c. 10 m/s

**d. 10 m/s to the north**

A ball launched into the air at 45° to the horizontal initially has

**a. Equal horizontal and vertical components**

b. Components that do not change in flight

c. Components that affect each other throughout flight

d. A greater component of velocity in the vertical component

An airplane flying into a head wind loses ground speed, and an airplane flying with a tail wind gains ground speed. If an airplane flies at right angles to the wind, then the ground speed is

more

The capacity (ability) of a substance to store heat depends on

Its chemical composition

The continuous movement in the atoms/molecules causes

The matter to have kinetic energy

The warmer an object,

The greater the kinetic energy

Temperature

The quantity that tells how hot or cold something is compared with a standard

The hotter something’s temperature, the ______ it gets. The colder it is, the ______ it gets

(1) bigger (2) smaller

Celsius scale freezing/boiling point of water

0, 100