Which of these are not mechanical waves and can be used to send a signal to astronauts on the moon?

A) sound waves

B) radio waves

C) both sound waves and radio waves

D) neither sound waves or radio waves

Which type of star is the sun? red giant black dwarf main-sequence black hole

Why are all tides greatest at the time of a full moon or new moon?

Now solve the differential equation V (t) = -CRdV (t) dt for the initial conditions given in the problem introduction to find the voltage as a function of time for any time t. Express your answer in terms of q0, C, R, and t.

Traveling at an average rateaverage rate of between 50 and 60 miles per hour for 4 to 7 hours select the best estimate for the distance traveled. 150miles 315 miles 340miles 415miles

The maximum value C = 3x + 2y to the following const X>0 Y>0 X+3y<15 4x+y<16

What are the moons of the outer planets made of, and how is their composition different from that of our Moon?

What is the main difference between geocentric and heliocentric models of the solar system

A flywheel in a motor is spinning at 530 rpm when a power failure suddenly occurs. The flywheel has mass 40.0kg and diameter 75.0cm. The power is off for 39.

Witch types of electromagnetic waves have wavelengths that are longer than those of visible light but shorter than those of microwave?

Temperature is the transfer of thermal energy from one object to another.