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A laser beam aimed from the earth is swept across the face of the moon.
a)If the beam is rotated at an angular velocity of 1.30×10?3rad/s, at what speed does the laser light move across the moon's surface?
b) If the diameter of the laser spot on the moon is 6.15km , what is the angle of divergence of the laser beam?
Vector A has components of +3 in the x-direction and -4 in the y-direction. Vector B has components -2 in the x-direction and +3 in the z-direction
An 845-N sled is pulled a distance of 170 m. The task requires 1.10 x10^4 J of work and is done by pulling on a rope with a force of 12N. At what angle is the rope held.
The average speed of the atoms in a 1.6 g sample of helium gas is 651 m/s. Estimate the thermal energy of the sample
A space probe speeding toward the nearest star moves at 0.28c, What frequency is received on earth
you need to determine the density of an unknown liquid. to this end you perform an experiment with a block and notice that the block floats in this unknown liquid with 4.6 cm of its side submerged. determine the density of the unknown liquid
A passenger on a stopped bus notices that rain is falling vertically just outside the window. Find the speed of the raindrops, given that the bus is moving with a speed of 17.2 m/s
After completing the calculations below, sketch the pH curve for the titration of 25.0 mL of 0.200M solution of a weak acid, HA = (Ka = 6.0 x 10^-7), with 0.200M KOH. Indicate the pH at (a) the beginning of the titration
A spring with 58 hangs vertically next to a ruler. The end of the spring is next to the 11- mark on the ruler. If a 2.5- mass is now attached to the end of the spring, illustrate where will the end of the spring line up with the ruler marks?
What is the ratio of the cardinals magnitude. One mole of tungsten (6 1023 atoms) has a mass of 184 grams, and its density is 19.3 grams per cubic centimeter. You have a long thin bar of tungsten, 2.3 m long, with a square cross section, 0.15 cm on..
An external force F, with a magnitude of 16.49 N, acts on a block of mass 1.40 kg parallel to a plane, Calculate the magnitude of the frictional force acting on the body
A 200 gm block of metal is heated to 100 degrees Celcius in boiling water. This block is after placed in an aluminum calorimeter cup (mass - 30gm; c - .22 cal/g degrees C) containing 180 gm of water at 20 degrees C.
You're an optometrist, mounting a projector at the back of your 4.2m -long exam room, 2.6 m above the floor. At what height should you center the pattern on the wall
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