How long ago did homo sapiens first appeared in the fossil record? Identify the era in which this occurred.

The cheetah starts at a position of 0.2 m and ends at a position of 45.6 m. What is the displacement of the cheetah during this time?

Give an everyday example of an action and reaction pair that does produce motion and one that does not.

How many miles can you get on one tank of gas if yout tank holds 18 gallons and you get 22miles per gallon

Expresa en terminos de la unidad fundamental

Do objects with more mass have more friction

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.