4. E A charge of−8.3휇C is traveling at a speed of 7.4 × 106 m/s in a region of space where there is amagneticfield. The angle between the velocity of the charge and thefieldis 52°. A force of magnitude5.4 ×10−3N acts on the charge. What is the magnitude of the magneticfield?

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy