Alisa, a skateboarder, is riding down a hill. If Alisa and the skateboard are considered a single object, what forces are acting on her? check all that apply

push

gravity

normal force

friction

tension

7. How does friction affect the kinetic energy of an object?

During a breath, the average human lung expands by about 0.50 l. part a if this expansion occurs against an external pressure of 1.0 atm, how much work (in j) is done during the expansion?

A projectile is launched at ground level with an initial speed of 53.0 m/s at an angle of 35.0° above the horizontal. It strikes a target above the ground 2.50 seconds later.

In electromagnetic waves, frequency is inversely proportional to A: Amplitude B: Wave Speed C: Wavelength D: Reflection

An insulated piston-cylinder device contains 5 l of saturated liquid water at a constant pressure of 150 kpa. an electric resistance heater inside the cylinder is now turned on, and 2200 kj of energy is transferred to the steam.

8. A car moving at 35 m/s has 675 joules of KE. What is the mass of the car?

What force works against gravity as water infiltrates the soil and moves underground?

When is it safe for you to place a construction load on a concrete structure

You have two pendulums with cords that are exactly the same length. one is on earth (with an acceleration due to gravity of 9.81 meters/second2) and the other one is on the moon (with an acceleration due to gravity of 1.63 meters/second2).

The magnetic field is 0.0 2M from the wire is 0.1 T what is the magnitude of the magnetic field 0.0 1M from the same wire