A marble is dropped from 2.5 m and hits the ground in 0.71 s. What is the final velocity before it hits the ground? pls right in simple way im in 9th

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv.a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?