Ahall-effect probe to measure magnetic field strengths needs to be calibrated in a known magnetic field. although it is not easy to do, magnetic fields can be precisely measured by measuring the cyclotron frequency of protons. a testing laboratory adjusts a magnetic field until the proton's cyclotron frequency is 9.60 mhz . at this field strength, the hall voltage on the probe is 0.540 mv when the current through the probe is 0.143 ma . later, when an unknown magnetic field is measured, the hall voltage at the same current is 1.736 mv .a) what is the strength of this magnetic field?

The ballistic pendulum was invented in 1742 by english mathematician benjamin robins. it consists of an initially stationary pendulum that moves after being struck by a bullet, and it is used to measure the original velocity of the bullet. the known variables are the bullet's mass m, the pendulum's mass m, and the height to which the block and bullet swing, determined by the length of the pendulum l and final angle θ. two principles of physics are necessary to solve for the bullet's original velocity. what are these principles? conservation of momentum and newton's third law conservation of energy and conservation of angular momentum grade summary deductions 0% potential 100% conservation of momentum and newton's second law. newton's second law and conservation of angular momentum. conservation of energy and newton's third law conservation of momentum and conservation of angular momentum. conservation of momentum and conservation of energy conservation of energy and newton's second law.

1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same