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A box with a mass of 1.0 kg is moving to the right. Its initialspeed is 2 m/s. After traveling 3 m, its speed is 4 m/s. Inadditional to the usual forces (gravity, normal, friction) thereare two other forces acting on the box. One is a 5 N force that hasan upward vertical component of 4 N and a component to the left of3 N. The other force is 8 N to the right.(a) What is the normal force?(b) What is the coefficient of kinetic friction?
In the figure, suppose that the separation between speakers A and B is 5.90 m and the speakers are vibrating in phase. They are playing identical 110-Hz tones, and the speed of sound is 343 m/s.
A stick is resting on a concrete step with 2/9 of its length hanging over the edge. find the magnitude of the angular acceleration of the stick
Starting from rest, a 12 cm diameter compact disk takes 2.4 s to reach its operating angular velocity of 2030 rpm. How much torque is applied to the disk
question1two identical clocks a and b are at first synchronized at the bottom inside a vacuum chamber xed on the
Calculate the theoretical resolution (assuming no lens aberrations) for green light
a simple reaction-time test a meter stick is held vertically above your hand with the lower end between your thumb and
1. a static magnetic field does no work on a charge moving parallel to the field.2. the direction of the magnetic field
It is 150 cm from your eyes to your toes. You are standing 196 cm in front of a tall mirror. How far is it from your eyes to the image of your toes.
A rocket of total mass 3160 kg is traveling in outer space with a velocity of 120 m/s. To alter its course by 38.5 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. how much mass must be expelled
A nuclear power plant has a maximum steam temperature (T_H) of 310 MW. It produces 410 T_C of electric power in the winter, what's its summertime electric power output
You have a parallel plate capacitor with plates of 1.3 m2, and the magnitude of charge on each plate is 6.7 C. What is the force on an electron between the plates?
An electron has an initial, vertical velocity v0, y=.0001 c when it enters a uniform, horizontal electric field, E=0.5 x (x hat). how far will the electron be deflected
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