Which of the following is a scalar quantity?

A.

90 km/hr north

B.

20 m/s at an angle of 25

C.

30 pounds

D.

15 N down

How could you show the effect that gravity has on you? Name 2 ways and explain how they would show that gravity affects you.

A large rectangular raft has a density of 725.5 kg/m3) and floating on a lake. The surface area of the top of the raft is 39.6 m 2 and its volume is 5.2 m3. Assume acceleration of gravity is 9.8 m/s2 and the density of the water is 1000 kg/m3.

A 5.5 kg ball initially at rest is dropped from the top of a 12 m building. It hits the ground 1.75s later. Find the net external force on the falling ball

Can Volcanoes create new landforms such as mountains

The drawings show three situations in which a positively charged particle is moving through a uniform magnetic field B with a velocity v. For each situation, what is the direction of the magnetic force F exerted on the particle?

Define the term volt.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

If a 1.50 kg mass revolves at the end of a string 0.50 m long, and its tangential speed is 6.0 m/s, calculate the centripetal force.