### 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**