Earth travels around the sun in a nearly circular orbit at a mean distance of 1.5 x 10 ^11 m the sun’s mass is 1.99 x10^30 Kg. Calculate the Earth ‘s orbital period and orbital speed.

Achild throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. the ball leaves her hand 1.00 m above the ground. how long is the ball in flight before it hits the ground?

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

Positrons are spontaneously emitted from the nuclei of