In the bohr model of the hydrogen atom the electron circulates around the nucleus in a path of radius 5.1❌10^-11 meter at a frequency of 6.8❌10^15 rev/sec. what value of magnetic field is set up at the center of the orbit?

An object's buoyant force and weight mean the same thing. a. trueb. false

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass