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You're an optometrist, mounting a projector at the back of your 3.8m -long exam room, 2.6m above the floor. It shines an eye-test pattern on the opposite wall. Patients will sit with their eyes 2.8m from the wall and 1.5m above the floor to view the pattern.
At what height should you center the pattern on the wall?
Two particles of masses m and 3m are moving toward each other along the x-axis with the same speed v. Determine the final speed of the heavier object
A 5.00-g bullet, traveling horizontally with a velocity of magnitude 360 m/s, is fired into a wooden block with mass 0.800 kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg and the same charge. The two particles are initially held in place and then released.
Calculate the resulting wave of a superposition of 600 MHz and 600.006 MHz (10 ppm of from 600 MHz carrier frequency
A scaffold of mass 44 kg and length 6.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
This time, william tell is shooting at an apple that hangs on a tree. the apple is a horizontal distance of 20.0m away and at a height of 4.00m above the ground. what is the arrow's inital velocity
A large plastic block has a net charge of -1.0mC. How many more electrons than protons are in the block
A 0.24-kg ball on a stick is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, Find the tension in the stick
A beam of electrons is first accelerated (from rest) through a region of electric potential difference V=10 keV and then made to go through a slit of width a. What is the value of the momentum (px) of each electron
An airplane flying directly eastward at a constant rate travels 305 km in 2.0 h. What is the average velocity of the plane
Two waves with identical frequency but different amplitudes A1= 5.0cm and A2 = 3.0 cm, what is the amplitude of the resulting wave if they interfere constructively
A uniform plank of length 2m and mass 29kg is supported by three ropes, as indicated by the blue vectors. Find the tension in each rope when a 690N person is 0.500m from the left end.
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