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A ferryboat sails between two towns directly opposite each other on a river. if the boat sails at 15 km/h relative to the water, and if the current flows at 6.3 km/h, at what angle should the boad head?
A parallel beam of light from a He-Ne laser, by a wavelength of 656 nm falls on 2 slits and produces an interference pattern in which the third order fringe is 32 mm from the central fringe on a screen 1.6 m away. What is the separation of the two sl..
an apparatus that liquefies helium is in a room maintained at 306 k. if the helium in the apparatus is at 4.0 k what is
q1. clarify how einsteins contribution to understanding the force between the earth and the moon differed from newtons.
A ball rolls off a table and falls 0.70 m to the floor, landing with a speed of 4.3 m/s. What is the magnitude of the acceleration of the ball just before it strikes the ground
Four 1.2 kg masses are located at thec orners of a square 0.80 m on eachside. Find the magnitude and direction of the gravitational forceon a fifth 1.2 kg mass placed at the midpoint of the bottom side of the square.
Next you eliminate the 11 kg mass, place the rod horizontally, and strike one end with a hammer. How much time t would elapse before a microphone at the other end of the bar will detect a disturbance.
If 45 g is suspended at 25 degree, 105 g is suspended at 85 degree, and 65 g is suspended at 330 degree, what mass must be suspended at what angle to balance these three forces?
A thin sheet of transparent material is surrounded by air. The sheet has an index of refraction of 1.47, Calculate the wavelength of the light in the material
You are examining a flea with a converging lens that has a focal length of 4.00 cm. how far is the flea from the lens
A 5-kg rock is thrown upward with a force of 150 N at a location where the local gravitational acceleration is 9.79 m/s2. Determine the acceleration of the rock, in m/s2.
An RLC circuit has a sinusoidal voltage supplied to it at 632 kHz with a peak voltage of 748 V; a 25 k? resistance; a 16 µF capacitance; and a 30 H inductance
a copper rod 0.150 m long and with a mass of 0.0500 kg is suspended from two thin flexible wires. at right angles to
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