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a 25-N block slides down a plane inclined at 21.2 degrees to the horizontal with constant velocity. find the total force resisting the motion of the block.
An electron with kinetic energy of 6.0 x 10-16 J is moving to the right along the axis of a cathode-ray tube. There is an electric field vector = (2.0 x 104 N/C) j in the region between the deflection plates.
Two loudspeakers in a 20°C room emit 629 Hz sound waves along the x-axis, If the speakers are out of phase, what is the smallest distance between the speakers for which the interference of the sound waves is constructive
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.27 × 10-6 T. What is the intensity S of the wave
A 8.00×106 ? resistor and a 0.80 ?F capacitor are connected in series with an ideal battery of 10.00 V. How much energy was provided by the battery?
Deflection of the electron beam in a tube TV set is accomplished by magnetic forces. how far from the center of the screen does the beam strike
A 2 200-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.20 m before coming into contact with the top of the beam, Find the magnitude upwards
An air molecule is moving at a speed of 438m/s. How many meters would molecule move during 7ms (milliseconds) if it didn't collide with any other molecules.
The acceleration as a function of time of a mass-spring system is given by a=(0.70m/s^2)sin[(3rad/s)t]. a)If the spring constant is 20N/m, what is the amplitude? b)What is the initial velocity? c)what is the mass of object?
An air conditioner connected to a 139 V rms ac line is equivalent to a 11 capital omega resistance and a 2 capital omega inductive reactance in series. What is the impedence of the air conditioner
A student sets up a double slit interference experiment using light of wavelength λ. The separation between the slits is 25λ. What are the angles for the first three dark fringes
Direction of the surface winds What is the expected composition
A student has a stretched string on density u and length L under a tesnion F. A standing wave of frequency f = 4/4 squareroot, Calculate the length of the string
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