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1. An electron in a vacuum acelerates from rest through a potential difference of 550V and then enters a magnetic field at right angles to the direction of the field. What must the magnetic field strength be to make the electron travel in a circular path with a radius of 11cm?
A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude P. The instantaneous velocity of this car is proportional to
Capacitors C1 = 5.60 µF and C2 = 2.45 µF are charged as a parallel combination across a 250 V battery, Calculate the resulting charge on each capacitor
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. find the sound intensity level relative to the threshold of hearing
A 0.570 kg ball is dropped from rest at a point 1.50 m above the floor. The ball rebounds straight upward to a height of 0.800 m. Illustrate what are the magnitude and direction of the impulse of the net force applied to the ball during the collis..
a randomized trial is conducted to evaluate the efficacy of a new cholesterol lowering medication. the primary
An automobile travels on a horizontal section of highway at sea level where the temperature is 20-C. Estimate the horsepower needed for a speed of 100 km/h. Make any needed assumptions.
A spring hanging from the ceiling has an unstretched length of 80 cm. What is the amplitude of the resulting oscillation
A small insect viewed through a convex lens is 1.5 cm from the lens and appears three times its actual size. What is the focal length of the lens?
An 1800 kilogram car drives east at 15 meter per second, and a 2350 kilogram truck drives east at 8.6 meter per second. Find the total momentum of this two-vehicle system
A river ?ows at a speed vr = 5.85 km/hr with respect to the shoreline. A boat needs to go perpendicular to the shoreline to reach a pier on the river's other side, determine the width of the river
A sled starts from rest at the top of a hill and slides down with a constant acceleration. What is the speed of the sled when it passes the 14.4-m point
What is the change in length of the rope whilst the skier has the acceleration whose magnitude is 0.65 m/s2.
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