IB Physics Revision

An airtight container holds a fixed quantity of gas. Its pressure and volume are measured on four occasions when the temperature is 20 °C. The results are shown in the table. Which set of readings is incorrect? 

• A
• B
• C
• D

Some air is trapped inside a small balloon. The average kinetic energy of the air molecules in the balloon is increased. What remains the same? 

• the density of the air in the balloon 
• the mass of the air in the balloon 
• the temperature of the air in the balloon 
• the volume of the air in the balloon 

Tags

NGSS.HS-PS3-4

An ice-cube has a mass of 7.50 g. The ice-cube is at 0 °C. Heat from the surroundings reaches the ice-cube at an average rate of 1.25 J / s. How long does it take for all of the ice to melt? (specific latent heat of fusion of ice = 333 J / g) 

• 35.5s 
• 55.5s 
• 2000s 
• 3120s 

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-4

The units for momentum are

• kg
• m/s
• kg-m/s
• kg/m/s

Tags

NGSS.HS-PS2-2

The difference between a car hitting a wall vs. a car hitting a hay stack is

• the Impulse on the car hitting the wall is greater
• the change in momentum of the car hitting the wall is greater
• the force on the car hitting the hay stack is greater
• the collision time of the car hitting the hay stack is greater

Tags

NGSS.HS-PS2-2

Energy is lost during this type of collision

• elastic
• inelastic
• energy is lost in both types of collisions

Tags

NGSS.HS-PS3-1

An open cart on a level surface is rolling without frictional loss through a vertical downpour of rain. As the cart rolls, an appreciable amount of rainwater accumulates in the cart. The speed of the cart will

• increase because of conservation of mechanical energy
• decrease because of conservation of momentum
• decrease because of conservation of mechanical energy
• remain the same because the raindrops are falling perpendicular to the direction of the cart's motion

Tags

NGSS.HS-PS2-2

A bug flies into the windshield of a car going the opposite way. Which of the following are true.

• the force of impact is the same for both
• the impulse is the same for both
• the acceleration of the bug is larger than the truck
• A, B, and C are all true

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A pendulum oscillates as shown. At which of the following positions is the kinetic energy equal to the total energy?

• A

• B

• C

• Not enough information given.

A pendulum oscillating near the surface of the Earth swings with a time period T. What is the time period of the same pendulum near the surface of the planet Mercury where the gravitational field strength is 0.4g?

• 0.2 T

• 0.6 T

• 1.2 T

• 1.6 T

Tags

NGSS.HS-PS2-4