For a bohr model, how many protons, electrons, and neutron does Sodium has

Lightning bolts can carry currents up to approximately 20 ka. we can model such a current as the equivalent of a very long, straight wire. part a if you were unfortunate enough to be 5.

How does the mass of a bowling ball that has been rolled down the lane affect the kinetic energy?

A small plastic sphere with a charge of - 6.0 nC is near another small plastic sphere with a charge of - 14 nC. If the spheres repel one another with a force of magnitude 8.3*10-4 N, what is the distance between the spheres?

True or false? a car moving at a steady speed of50 miles per hours has no forces acting on it

An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 491 Hz when the train is approaching him and 472 Hz when the train is receding from him.

Which of the following describes a response to external stimuli? a rabbit runs away from a fox that is chasing it a woman drinks water when she is thirsty a boy eats food when he is hungry a person yawns when oxygen levels in the blood are low

Why do moon phases repeat about every 28 days

Which energy transformation takes place when a firecracker explodes

Newton's first law states that an object traveling with a constant velocity will remain traveling at a constant velocity unless an unbalanced force acts.

A karate expert breaks a stack of bricks with his bare hand. If the force applied is 520 newtons and the impact time is 5.0 * 10-4 seconds, what is the value of impulse?