A water bed weighs 1025 N, and is 1.5 m wide by 2.5 m long. How much pressure does the water bed exert if the entire lower surface of the bed makes contact with the floor?

a.

3.6 x 102 Pa

c.

1.2 x 103 Pa

b.

2.7 x 104 Pa

d.

2.7 x 102 Pa

A skier starts from rest at the top of a 40.8 m hill, skis down a 30 degree incline into a valley, and continues up a 32.5 m high hill. The heights of both hills are measured from the valley floor.

A boat displaces a volume V of water as it floats on a fresh-water lake. When the boat moves into the ocean, what volume of salt water will it displace? (The density of fresh water is 1.0 kg/L, and the density of salt water is 1.02 kg/L) a) 1.

A ball is thrown upward from the ground with an initial speed speed of 25 meters/second; at the same instant, a ball is dropped from rest from a building 15 meters high. After how long will the balls be at the same height?

In terms of substances explain why evaporation of water is a physical change and not a chemical change

A box mass of 24kg is being pulled horizontally on a rough surface by an applied force of 585N. The coefficient of kinetic friction is 0.23 between the box and the surface. a) Find the normal force on the box b) Find the acceleration on the box

An object moves from the position + 16m to the position + 43m in 12s. What us the total displacement

Momentum can be defined as "mass inmotion." All objects have mass; so if anobject is moving, then it has momentum - ithas its mass in motion.

What would happen if we didnt use units when measuring?

Differentiate between fundamental quantity and derived quantity

Which one of the following will not generate electromagnetic waves or pulses? (A) an alternating current (B) an accelerating electron (C) a proton in simple harmonic motion (D) a direct current (E) charged particles traveling in a circular path in a