A car travels up a hill at a constant speed of 22 km/h and returns down the hill at a constant speed of 55 km/h. calculate the average speed for the round trip.

In what part of a volcano would you expect to find rocks with the coarsest grains

a bird flying horizontally accidently at 4.25m/s accidentally drops a rock it was carrying. A short time later, the rocks velocity is 13.0m/s at - 70.9. How much time has passed? (unit s)

How many grams are in 882 μg? & The density of gold is 19.3 g/cm3.? Answer the following: a. What is the volume, in cubic centimeters, of a sample of gold with mass 0.715 kg? b.

The rocket-driven sled Sonic Wind No. 2, used for investigating the physiological effects of large accelerations, runs on a straight, level track that is 1080 m long. Starting from rest, it can reach a speed of 1560 km/h in 1.70 s.

Which collects light in a reflecting telescope? a. concave lens b. concave mirrors c. convex lens d. convex mirror

A constant force is exerted for a short distance on a block of mass that is initially at rest on a horizontal frictionless plane. This force gives the block a certain final speed v.

A football quarterback is moving straight backward at a speed of 3.00 m/s when he throws a pass to a player 20.0 m straight downfield. (a) if the ball is thrown at an angle of 25.

Simone is walking her dog on a leash. The dog is pulling with force of 34 N to the right and simone is pulling backward with a force of 16 N

An object moves with velocity v (t) = t^2-8t+7 a) write a polynomial expression for the position of the particle at any time t greater or equal to zero.

Is a lack of thorns a mutation? (on a plant)