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Tension is maintained in a string. The observed wave speed is24 m/s. When the suspended mass is 3.0 kg
a) What is the mass per unit length of the spring?
b) What is the wave speed when the suspended mass is 2.0kg?
In a test laboratory, an electric engine is used to accelerate a wheel from rest. what is the average power output of the engine
The three particles shown move along a straight line (1-D). One particle is initially moving to the right, while the other particles are stationary and separated slightly, as shown in the figure. The two stationary particles have the same mass whi..
A hotel elevator ascends170m with a maximum speed of5.4m/s. How long does it take to make the complete trip from bottom to top
An old trick to find out if a train is coming is to put your ear on the rails of the track. Why is this more effective than just listening for the sounds the train makes in air.
A crate of potatoes of mass 12.0 kg is on a ramp with angle of incline 30° to the horizontal, Find the frictional force (magnitude and direction) on the crate if the crate is sliding down the ramp
A pair of slits, separated by 0.180 mm, is illuminated by light having a wavelength of ? = 612 nm. Express this path difference in terms of the wavelength
A jet plane begins a dive with an initial speed of 135 m/s and accelerates along its path at 20 m/s^2, find the acceleration of the plane at the bottom of the circular path
An infinite plane of charge with surface charge density ?1 = 3.7 µC/m2 is parallel to the xz plane at y = -0.8 m. A second infinite plane of charge with surface charge density ?2 = -1.1 µC/m2 is parallel to the yz plane at x = 1 m.
Points A and B have electric potentials of 320 and 160, respectively. When an electron released from rest at point A arrives at point C, its kinetic energy is.
A beam of light strikes the plane surface of borate flint glass at an angle of incidence of 57°. How much smaller is the angle of refraction for violet light of wavelength 400 nm than that for red light of wavelength 700 nm
a 49N brick is placed in 1m^3 of oil. the volume of the oil raises to 1.025m^3. What are the forces acting on the brick when at rest on the scale at the bottom of the pool? Include their direction
A 1.85 book is sliding along a rough horizontal surface. At point A it is moving at 3.35 , and at point B it has slowed to 1.41. How much work was done on the book between A and B
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