Air has weight.

a. True

b. False

On Mars, how much would a 1kg object weigh

if a runner's is 400 w as she runs, how much chemical energy does she convert into other forms in 10.0 minutes?

This structure shows how atoms make up sugar. The different colors represent different types of atoms. Is sugar an element, just a molecule, or a molecule and a compound? How do you know?

Strzała o masie 20g tuz po wystrzale ma prędkość 50m/s. Oblicz pracę wykonana przez zawodniczkę. Ile wynosi energia potencjalna sprężystości napiętej cięciwy?

What force caused the movements of the continents from one supercontinent to their present positions

Which of the following statements are true? Check all that apply. O A positive charge and a negative charge attract each other. O Electric charge is conserved. O Two positive charges attract each other. O A neutral object contains no charge.

You push a shopping cart filled with groceries (total mass = 20 kg) by applying a force to the cart 30° from the horizontal. if the force you apply has a magnitude of 86 n, what is the cart's acceleration? assume negligible friction.

Two objects are made of the same material, but they have different masses and temperatures. If the objects are brought into thermal contact, which one will have the greater temperature change

A ball strikes a wall. It exerts a force of 10 N to the left against the wall and bounces off. What force does the wall exert on the ball?

A car slows down from 24 m/s to rest in a distance of 90 m. what was its acceleration, assumed constant? incorrect: your answer is incorrect. m/s2