Two boxes of masses m and 3m are stacked. (see fig. 4-6.) the surface between the more massive box and the horizontal surface is smooth and the surface between the boxes is rough. if the less massive box does not slide on the more massive box, what is the coefficient of static friction between the boxes?

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

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