In a hydrogen atom, the electron in orbit around the proton feels an attractive force of about 7.45 * 10-8 N. If the radius of the orbit is 5.89 * 10-11 m, what is the frequency? Answer in units of rev/s

Mass divided by volume equals

Which of the following is true about the gibbous moon? A. All of its lit surface can be seen. B. More than half of its lit surface can be seen. C. Less than half of its lit surface can be seen. D. None of its lit surface can be seen.

What is the acceleration of 2kg acted on by a force of 2n

If the velocity of a long jumper during take-offat an angle of 30 degrees is 42 f/s, how fast is he moving forward (Vx) and how fast is he moving upward (Vy) ? The answers should be in international units (m/s). 1 foot = 0.3048 m

The mass of the container holding this table salt is 3G. What is the mass of the table salt

How many hops does a kangoroo do in 1 day

What are the average velocity and average acceleration of the tip of a 2.4 cm long hour hand of a clock?

What is the number one and most important rule to remember in soccer?

Why are convection currents; why are they hotter and colder parts of earth

A swimmer is swimming to the left with a speed of 1.0 m/s when she starts to speed up with constant acceleration. The swimmer reaches a final speed of 2.5 m/s over a distance of 5.0 m. How long did the swimmer take to speed up to 2.