A cross country runner runs 20 km in 4 hours. what is his average speed

Suppose that another moon is discovered orbiting Jupiter once 300 days. which of the following values would best estimation of its average distance from Jupiter? A 1.30*10^7 km B 1.30*10^4 km C 1.30*10^6 km D 1.30*10^5 km

This is the process of organisms adapting to he environment overtime

A container can be made from steel [β = 36 * 10-6 (C°) - 1] or lead [β = 87 * 10-6 (C°) - 1]. A liquid is poured into the container, filling it to the brim.

A particle moving along the x-axis has its position described by the function x = (3.00t3-1.00t 2.00) m where t is in s. at t = 4.00 s what is the particle's velocity?

A spherical conductor with a 0.103 m radius is initially uncharged. How many electrons should be removed from the sphere in order for it to have an electrical potential of 4.50 kV at the surface

Is momentum conserved in the collision?

Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?

In a laboratory, you determine that the density of a certain solid is 5.23*10-6kg/mm3. Convert this density into kilograms per cubic meters.

List the solar objects in correct order from the Sun. Venus Earth Mercury Saturn Neptune Mars Jupiter Asteroid Belt The Sun Uranus

The power exerted by a muscle is the product of the force exerted and the velocity of contraction. The area of which of these shaded regions represents the power exerted while a weight is lifted at maximum speed?