Two frictionless carts are on a horizontal track. The first cart is initially at rest, and has a mass of 0.500 kg. It has a massless spring for a bumper (with spring constant 400 N/m). The second cart (mass of 0.800 kg), heads towards it from the left with a velocity of 2.00 m/s. a) What speed do the two carts have when they are travelling at the same speed

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

What is a good example of instantaneous speed