A substance through which a wave can travel

A 4 kg and 6 kg bowling ball are dropped from the same height at the same time. The two balls strike the ground at the same time. Which statement is true about the force due to gravity on the balls?

A person is pushing against a couch with a force of 50 n. what is the force of the couch against the man if the couch does not move?

Which particle is not part of an atom? a. proton b. electron c. neutron d. magnetic domain

For the first nutcracker, two applied forces of magnitude f were required to crack the nut, whereas for the second, only one applied force of magnitude f was required. how would you explain this difference?

Find the half-life of a radioactive material if after 1 year 99.67% of the initial amount remains. (Round your answer to one decimal place.)

A major obstacle to developing good human relations is that

4.) An apartment building is on fire and a guy is trapped on the fire escape ladder. There is a dumpster that is 6.3m away and is filled full of trash, and he is 7m above it.

Calculate the temperature of and power-per-area radiated from a blackbody if the spectral intensity density peaks at (a) gamma rays, λ = 1.50*10-14 m; (b) x rays, 1.50 nm; (c) red light, 640 nm; (d) broadcast television waves, 1.

How has increased energy use associated with scientific advancements affected society? a. It has led to an increase of the concentration of atmospheric carbon dioxide. b. It has led to an increase in hazardous wastes from mining operations. c.

Water is moving with a speed of 5.7 m/s through a pipe with a cross-sectional area of 4.8 cm2. The water gradually descends 9.2 m as the pipe increases to 8.8 cm2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.