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

What do you do to test a hypothesis? Question 1 options: Ask a question. Conduct an experiment. Enter data into a spreadsheet. my gees d

A person began running due east and covered 15 km in 2.0 hr. What is the average velocity of the person?

Room air at 23oC is heated by a 2000 W space heater with a surface filament temperature of 800 K. The room, at steady state, looses the power to the outside, which is at 7oC. Find the rate (s) of entropy generation and specify where it is made.

Objects falling through air experience a type of friction called a. terminal velocity. b. air resistance. c. inertia. d. rolling frictio

If a system absorbs heat and also does work on its surroundings its energy

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?

A car is driving towards a brick wall at a constant velocity (don't try this at home!) and the driver honks the horn of the car. the sound of the horn reflects from the wall and the echo is heard by the driver.

Mass number of an atom with 11 protons