An object with a mass of 0.8 kg is undergoing simple harmonic motion at the end of a vertical spring with a spring constant, k = 400 N/m. The object is observed to have a velocity of 0.3 m/s when passing through the equilibrium. a) State the general equation for displacement as a function of time for a simple harmonic
motion

b) Find the amplitude of the motion

c) Find the total energy of the object at any point of its motion​

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.