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An electron in a TV camera tube is moving at 6.20 × 106 m/s in a magnetic field of strength 73 mT. Without knowing the direction of the field, what can you say about the greatest and least magnitude of the force acting on the electron due to the field? (a) Maximum force? (b) Minimum force? (c) At one point the acceleration of the electron is 4.445 × 1016 m/s2. What is the angle between the electron velocity and the magnetic field? (deg)
The amount of internal enrgy needed to raise temperature of .25kg of water by .2 degreesCis 209.3J. How fast must a .25kg baseball travel in order for its kinetic energy to equal this internal energy.
The motion of a very massive object is hardly affected by what would seem to be a substantial force. Consider a supertanker, with a mass of 2.7×10^8 kg. find what will be the magnitude of its acceleration
Three resistors {R1 = 12.0 ?, R2 = 18.0 ?, and R3 = 36.0 ?} are connected in parallel, and in turn connected to a 70.0 V source with an internal resistance of 1.00 ?. calculate the terminal potential of the source
A 3.00 kg mass resting on a level table top is pulled along by a horizontal force of 16 N and accelerates at 4.00 meters per second per second. What is the force of friction between block and table.
A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. What is the velocity of the cart at that time
To determine the specific heat of an object, a student heats it to 100 degrees C in boiling water. If the final temperature is 23.8 degrees, what is the specific heat of the object
The situation just described occurs when the plane is above a point on the ground that is two-thirds of the way from the antenna to your house. determine the wavelength of the radio waves?
When cruising at 75 MPH on a highway, a car's engine develops 45 hp. The car's engine has a thermodynamic efficiency of 25% and 1 gallon of gasoline has an energy content of 1.3 × 108 J. How many gallons of gasoline are consumed each second
The angular momentum of a flywheel having arotational inertia of 0.240 kg m2 aboutits axis decreases from 3.70 to 1.30 kg m2/s in2.10 s. What is the average power of the flywheel
A child's toy consists of a piece of plastic attached to a spring in the figure below. The spring is compressed against the floor a distance of 2.00 cm, estimate the force constant of the spring
A meterstick (L = 1 m) has a mass of m = 0.133 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark. What is the tension in the left string right after the right string is cut
A beaker is filled to the brim with water. A solid object of mass 3.00 kg is lowered into the beaker so the object is fully submerged in the water, find the buoyant force that acts on the submerged object
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