Mary is trying to determine the charge of an object in the lab. She observes that it is repelled by a positively charged rod. What can you say about the charge of the object?

Standing on top of a building, Bob tosses a baseball straight up with an initial speed of 15 m/s. It takes 4.0 s for the ball to hit the ground. What is the vertical distance of the building? (g = - 9.8 m/s²)

An elevator is rising at constant speed. Consider the following statements: 1. the upward cable force is constant 2. the kinetic energy of the elevator is constant 3. the gravitational potential energy of the Earth-elevatorsystem is constant 4.

The blades in a blender rotate at a rate of 6800 rpm. When the motor is turned off during operation, the blades slow to rest in 2.8 s.

This is a naval tactic where submarines sink merchant ships without warning.

You drop a 30 g pebble down a well. You hear a splash 2.7 s later. What was the pebble's speed just as it reaches the water? Assume g = 9.8 m/s2

I to fall in love with someone or to at least get a boyfriend

Is rain falling a contact or noncontact force

How does a concave lens differ from a convex lens?

Which object has the greatest gravitational attraction?

Masa samochodu wynosi 2000 kg. Siła parcia wywierana przez cztery koła na powierzchnię szosy wynosi: A. 2000 N B. 20000 N C. 500 N D. 5000 N szybko plis