Is energy conserved when a ball falls to the ground

A light year is a measurement of

You calculate the density of a block of aluminum to be 2.68 g/cm3. You look up the density of a block of aluminum at room temperature and find it to be 2.70 g/cm3. This results in an error of 0.7%.

The division of earths history into similar units makes up the a. eras b. geologic time scale c. periods d. sequence of events

A boat is 4.0meters long and 2.0meters wide. Its water line is 1.0meter from the bottom of the boat; it is submerged to this water line. What is the mass of the boat? A. 8000kgB. 600kgC. 130kgD. 800kgE. 200kg

Whichh phrase best describes the function of cillia? A. Allow the cell to he motile B. Assist with protein production C. Allow the cell to use energy D. Assist with cellular respiration

The malfunction indicator light in an OBD II system is flashing. Technician A says that this simply indicates a soft failure. Technician B says this means the problem could be damaging the catalytic converter. Who is right? A. Technician A only B.

What are some methods humans have used to control flooding and what has been done to worsen the effects of flooding?

Suppose an electron is moving with a constant velocity until it encounters a positively charged sphere on its right. How does the sphere alter the trajectory of the electron? a. It has no effect on the trajectory of the electron b.

Most of the mass of the Milky Way exists in the form of: a.) starsb.) gasc.) dustd.) dark matter

A 55kg cart is pushed by a force of 225 n. what is the carts acceleration?