As Gabriel has gotten older, he has shown a lot of growth in his emotional development. How is this MOST accurately demonstrated? A. He used to cry and scream all the time, but now he can better control his feelings. B. He used to be influenced by his parents, but now he is influenced by his friends. C. He used to only be able to understand a few words, but now he is using complete sentences. D. He used to be barely able to walk a mile, but now he is able to run 20 minutes a day.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is

Why should the wavelength scale of spectroscope be calibrated