The maximum wavelength of light required to eject an electron from zinc is 270nm. Calculate the threshold frequency of zinc.

Which type of mine involves digging tunnels and shafts deep underground? Question 19 options: 1) strip mine 2) openpit mine 3) subsurface mine 4) smelting

How much kinetic energy is in a punch thrown at 30 m/s? The fist and arm weighs 6 lbs. (1 lb = 2.2 kg)

If a cart of 10 kg mass has a force of 5 newtons exerted on it, what is its acceleration? m/s2

Charges a and b in the figure are equal. each charge exerts a force on the other of magnitude f. suppose the charge of b is increased by a factor of 4, but everything else is unchanged.

Which of the following is a benefit of globalization?

Ina shoots a large marble (Marble A, mass: 0.08 kg) at a smaller marble (Marble B, mass: 0.05 kg) that is sitting still. Marble A was initially moving at a velocity of 0.5 m/s, but after the collision it has a velocity of - 0.1 m/s.

The elements that touch the zigzag line ar classified as

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed? A. 25 g B. 100 g C. 75 g D. 50 g

During a transit, a passes in front of its parent star, temporarily decreasing the star's brightness by a small amount.

How much of each food dollar goes to the producer