(Multiple Choice, 15 pts)

A student thinks that because the sun is made of gas, it transfers heat to Earth by convection. Which explains why this is an incorrect description of how the sun transfers heat to Earth?

A. The space between the sun and Earth contains no matter.
B. Convection cannot occur in gases.
C. Earth can absorb heat only in the form of radiation.
D. Electromagnetic waves do not carry energy.

A or D?

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Which levels of government establish and implement educational requirements for minors