A square coil (length of side = 24 cm) of wire consisting of two turns is placed in a uniform magnetic field that makes an angle of 60° with the plane of the coil. If the magnitude of this field increases by 6.0 mT every 10 ms, what is the magnitude of the emf induced in the coil?
a. 55 mV
b. 46 mV
c. 50 mV
d. 60 mV
e. 35 mV
d
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A 1000-kg car is moving at 15 km/h. If a 2000-kg truck has 23 times the kinetic energy of the car, how fast is the truck moving?
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Collisions in Two Dimensions: A 900-kg car traveling east at 15.0 m/s suddenly collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together after the collision. What is the speed of the wreckage just after the collision?
A. 6.10 m/s B. 12.2 m/s C. 25.0 m/s D. 35.0 m/s E. 17.3 m/s
Lonnie pitches a baseball of mass 0.500 kg. The ball arrives at home plate with a speed of 35.0 m/s and is batted straight back to Lonnie with a return speed of 50.0 m/s. If the bat is in contact with the ball for 0.055 s, what is the impulse experienced by the ball?
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An alpha particle (m = 6.7 × 10^?27 kg, q = +3.2 × 10^?19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference VA ? VB
a. +4.2 V b. ?4.2 V c. ?9.4 V d. +9.4 V e. ?8.4 V