Earth orbits the sun with an average radius of 1.496 x 1011 m. The mass of Earth is 5.98 x 1024 kg. The Sun's mass is 1.99 x 1030 kg. The universal gravitational constant has a value of 6.67 x 10-11 Nm2/kg2. What is the value of the gravitational force between the Sun and Earth?

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.

What structural formula represents 4 electrons shared between two atoms?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.