The escape speed from an object is v2 = 2gm/r, where m is the mass of the object, r is the object's starting radius, and g is the gravitational constant 6.67 × 10-11 m3 kg-1 s-2. what is the approximate escape speed, in km/s, from the solar system starting from an orbit at 1.0 au? in this case, the mass of the sun, 2.3e+30 kg, can be used as the mass of the solar system

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Which statements did both aristotle and ptolemy assume? check all that apply.

Two cans on a sunny window one black and the other white construct and explanation of the effect of sun will have on both cans over a two hour period?