What class lever is a

1. Pencil Sharpener

2. Tennis racket

3. Hole puncher

4. Can opener

An astronaut is wearing a jet pack on a space walk. Including the jet pack, he has a mass of 90 kilograms. Initially, he is not moving with respect to the spaceship nearby. If the astronaut fires 0.

Describe the position of earth moon and sun during a solar eclipse

A 24.0-V battery is connected in series with a resistor and an inductor, with R = 9.40 Ω and L = 6.40 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value.

Two bricks, of mass m1 and m2, are separated by a distance r. The gravitational force of attraction between them is 1.5x10-8 N.

The smallest particle of an element that retains the properties of that element

A box is dragged without acceleration in a straight-line path across a level surface by a force of 13 N. What is the frictional force between the box and the surface?

What is a wormhole, and how is it formed?

Most cells cannot harness heat to perform work because

7 factors that can affect physical fitness

A force of 100 newtons is applied to a box at an angle of 36º with the horizontal. If the mass of the box is 25 kilograms, what is the horizontal acceleration of the box?