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A ladder of length b and weight W rests on a smooth floor and leans against a smooth vertical wall, the lower end of the ladder being attached by a string to a point on the wall a height h above the floor. If the ladder makes an angle theta with the wall, find the tension in the string.
A diffraction grating with 2.507 X 10^3 lines/cm is used to examine the sodium spectrum. a) calculate the angular separation of the two closely spaced yellow lines of sodium (588.485 nm and 589.067 nm) in the first order. Answer in units of degree..
A large tank opens to the air full of water has a small hole in it 2.0 m from the top. How fast is the water shooting horizontally of the hole
A bobsled slides down an ice track starting (at zero initial speed)from the top of a (n) 199 m high hill. The acceleration ofgravity is 9.8 m/s2. Neglect friction and air resistance and determine the bobsled's speed at the bottom of the hill.
Air that initially occupies 0.47 m3 at a gauge pressure of 100 kPa is expanded isothermally to a pressure of 101.3 kPa, Compute the work done by the air
In a typical lightning flash, the potential difference between the cloud and the ground is 10^9V and the charge transferred is 30 C. Calculate the final speed of the car
Sunlight, with an intensity of 657 W/m2, strikes a flat collecting surface perpendicularly and is totally absorbed. find the force in micronewtons that acts on the surface
Calculate the capacitance of a capacitor whose plates a 20.0 cm by 3.0 cm and are separated by a 1.0mm air gap. What is the charge on each plate if the capacitor is connected to a 12.0 V battery
A hydrogen atom makes a transition from the n = 2 level to the ground state (corresponding to n = 1). Find the wavelength and the frequency of the emitted radiation
A rope and two masses are suspended from the ceiling of an elevator which is accelerating downward at 2.8 m/s^2. find the tension in the rope connecting the two masses
A car accelerates from rest at a constant rate of 2.0 m/s^2 for 5.0 s. What is the speed of the car at the end of that time
A fully loaded, slow-moving freight elevator has a cab with a total mass of 1100 kg, which is required to travel upward 49 m in 3.9 min, starting and ending at rest. The elevator's counterweight has a mass of only 830 kg, so the elevator motor must h..
A highway curve with radius 950{\rm ft} is to be banked so that a car traveling 48.0{\rm mph} will not skid sideways even in the absence of friction. At what angle should the curve be banked?
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