A worker pushes a box with a horizontal force of 40.0 N over a level distance of 4.0 m. If a frictional force of 27 N acts on the box in a direction opposite to that of the worker, what net work is done on the box

Reacting molecules must hit each other with sufficient energy in order to form products, what theory is it

Shelly rolls ball A in the positive x direction with a velocity of 7.5 meters/second. It hits stationary ball B and they undergo elastic collision. The two balls have different masses. Which of the following statements is true?

What is nuclear pasta?

Suppose you had a feather, an orange, and a watermelon. Which of the following describes how quickly each of the objects will fall without air resistance, relative to the other two? a. All three objects will fall at the same rate. b.

Some fuels are classified as nonrenewable because they -

When using science to investigate physical phenomena, which characteristic of the event must exist? a. predictable b. observable c. provable d. readable

How many atoms are present in 3 moles of chromium? A. 1.80 x 1023 atoms B. 6.02 x 1023 atoms C. 52.0 atoms D. 1.80 x 1024 atoms

The gravitational force a. is a natural force like the strong and weak nuclear forces. b. weakens as 1/d, where d is the distance between objects. c. is the fundamental force repelling two masses from each other. d.

The balloon contain no gas initially. When it is connected to the cylinder gas enters the balloon the pressure in the cylinder decreases. Explain why the molecules inside the cylinder exerts a large pressure initially

What is the sidereal period used in Kepler's third law?