Asolar sailplane is going from earth to mars. its sail is oriented to give a solar radiation force of frad = 8.60 × 102 n. the gravitational force due to the sun is 173 n and the gravitational force due to earth is 1.00 × 102 n. all forces are in the plane formed by earth, sun, and sailplane. the mass of the sailplane is 15,000 kg.

What will a positive and a negative charge do if they are separated from each other?

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .