The gravitational force between the Sun (mass = 1. 99 Ă— 1030 kg) and Mercury (mass = 3. 30 Ă— 1023 kg) is 8. 99 Ă— 1021 N. How far is Mercury from the Sun? 6. 98 Ă— 1010 km 6. 98 Ă— 107 km 4. 87 Ă— 1013 km 4. 87 Ă— 1024 km.

What is the frequency of a light wave with a wavelength of 620nm

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.