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1. In the figure below, the horizontal surface on which the objects slide is frictionless. If F = 12 N, what is the tension in string 1?
2. An 8.0-kg object rests on the floor of an elevator which is accelerating downward at a rate of 1.3 m/s2. What is the magnitude of the force (in N) that the object exerts on the floor of the elevator?
Suppose a toy oscillated with a frequency of 500 Hz and hence a period of 0.002s. If the toy moves past an observer at 0.9c, what is the frequency as measured by the observer?
Two ropes are attached to a skater as sketched in the figure below and exert forces on her as shown. Find the magnitude and direction of the total force
Diagram and describe the motion of a charged particle in a uniformmagnetic field when the particle is launched with a velocity perpendicular to thef ield.
Three identical boxcars are coupled together and are moving at a constant speed of 28.0 on a level, frictionless track. What is the speed of the four cars
A 10 meter length of wire consists of 5.3 meter of copper followed by 4.7 meter of aluminum, both of diameters 1 millimeter. Determine the total resistance of the wire
A cable is 50.0 m long and has a diameter of 2.50 cm. A force of 10,000 N is applied to the end of the cable. what is the minimum tensile modulus allowed
The deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 volt potential difference is suddenly applied to the initially uncharged plates through a 950 ohm resistor in series with the deflection plates.
A Tube, of length 30 cm, is closed at one end, and produces a sound at the fundamental frequency of 270 Hz. Calculate the length of the second tube
a ball is thrown upward from the ground with an initial speed of 25 ms at the same instant a ball is dropped from a
A 0.30-kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. What is the total work done on the particle as it moves from A to B
Astronauts on the space shuttle used radar to determine the magnitudes and direction cosines of the position vectors of two satellites A and B. What is the angle between the two vectors rA and rB
consider a heat pump which is used to cool down a home during the summer. its coefficient of performance in cooling
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