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A person with a near-point distance of 25 cm finds that a magnifying glass gives an angular magnification that is 1.5 times larger when the image of the magnifier is at the near point than when the image is at infinity. (Assume that the magnifying glass is held directly in front of the person's eyes in each case.) What is the focal length of the magnifying glass? (Include the sign.)
A bug of mass 1.0 grams is caught up in the center of an oscillating spider web. show that this motion is generated by hooke's law force, f=-kx
A volleyball is spiked so that its incoming velocity of +4.79 m/s is changed to an outgoing velocity of -12.0 m/s. find the magnitude of the impulse that the player applies to the ball
A converging lens of focal length 7.830 cm is 19.8 cm to the left of a diverging lens of focal length -6.16 cm. Find the location of the coins final image
A bat in a cave emits a sound pulse and receives an echo 0.22 second later. Assuming that the speed of sound is 339 m/s, how far did the sound (the longitudinal wave) travel during this time.
Four mirrors are at right angles to one another. A light ray is incident on the first at an angle of 60. What is th angle of reflection from the third surface
At a height of fifteen meters above the surface of a freshwater lake, a sound pulse is generated. How deep is the lake
A rocket is launched at an angle of 52° above the horizontal with an initial speed of 103 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 32 m/s2. At this time, its engines fail and the rocket proceeds to move..
q1. a 3.10-m-long 310 kg steel beam extends horizontally from the point where it has been bolted to framework of a new
You have been asked to design a "ballistic spring system" to measure the speed of bullets. Find an expression for the bullet's speed
A rocket with an initial mass of 1 000 kg adjusts its thrust by varying the rate at which mass is ejected. at what rate is mass being ejected at that instant
The microwave radiation left over from the Big Bang explosion of the universe has an average energy density of 3.89 × 10-14 J/m3
The average density of the planet Venus is 5219 kg/m3. The acceleration of gravity on its surface is 8.84 m/s2. Calculate the average radius of Venus
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