Is mechanical energy conserved as a playground swing moves? Why or why not?

Melissa uses bags of mulch that way 40 pounds each. She needs to carry 10 bags to her truck. She usually carries one bag at a time. Would she do less work if she carried two bags at a time?

a motor boat heads east at 16 m/s across a river that flows north at 9 m/s. what is the resultant velocity speed and directions of the boat?

Which of the following answers describes Kepler's laws? a. Planets orbit in elliptical patterns; the bigger the planet, the more gravitational pull; a planet's gravitational pull is stronger or weaker depending on its distance from the Sun. b.

pangram, or holoalphabetic sentence, is a sentence that contains every letter of the alphabet at least once. The most famous pangram is probably the thirty-five-letter-long

A 70 kg boy is sitting 3 m from the ground in a tree. What is his potential energy?

Which air mass provides the moisture that produces the clouds and precipitation?

What is a relatively small rocky body that travels through out space

Which is true about the pressure of a fluid at a specific depth? It varies with the total volume of the fluid. It depends only on the type of fluid. It is exerted only in the downward direction. It depends on the surface area of the fluid.

The sum of potential and kinetic energies in the particles of a substance is called energy. True or False

Element X has a mass number of 40 and an atomic number of 20, and element Y has a mass number of 56 and an atomic number of 26. Element X has more neutrons and fewer electrons than element Y. more neutrons and electrons than element Y.