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Problem:
An electron moves at a speed of v = 3 x 107 m/s parallel to and a distance d = 10 cm from a conducting wire carrying a current of I = 40 A. If the directions of the electron and current are as shown in the figure, what is the magnitude (in N) and direction of the force experienced by the electron?
A person has severe hearing loss that reduces the intensity in his inner ear by 39.1 dB. What amplification factor is needed for this person
A baseball has a velocity of 40.2 m/s (89.9 mi/h), directed horizontally, as it is released by a pitcher. Calculate the ball's instantaneous acceleration just before it is released
A diver runs horizontally with a speed of 0.767 m/s off a platform that is 8.40 m above the water. What is his speed just before striking the water?
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.2 × 10-15 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete hydrogen atom
Jack and Jill exercise in a 25.0-m-long swimming pool. Jack swims nine lengths of the pool in 159.5 seconds, while Jill, the faster swimmer, covers ten lengths in the same time interval. Find the average velocity and average speed of each swimmer.
a uniform rod of mass m 431.0 g and length l 31.1 cm stands vertically on a horizontal table. it is released from
A circular loop of wire of radius r = 0.32 m and resistance R=2.5ohms is placed in a uniform magnetic field that is perpendicular to the plane of the loop and initially directed in to the page. The field varies with time as Bz = -4T - (5.6 T/S )t +(2..
A transistor radio operates by means of a 12 V battery that supplies it with 56 mA current. what is the cost per kWh to operate the radio in this manner
A time-dependent force, Fvecbold = (7.50i hat bold ? 4.05tj hat bold), How far is the object from its initial position when its speed is 15.0 m/s
A uniform plank of length 5.5 m and weight 205 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support .To what distance x can a person who weighs 447-N walk on the overhanging part of the plank before it just ..
a cube of edge length 2.1 cm is positioned as shown in the figure below. there is a uniform magnetic field throughout
A jetliner is moving at a speed of 216 m/s. The vertical component of the plane's velocity is 79.70 m/s. establishes the magnitude of the horizontal component of the plane's velocity.
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