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Three masses (m = 1.2, 2.5 and 3.4 kg) are placed on a horizontal frictionless surface at the corners of an equilateral triangle of edge length l = 140 cm. Where is the center of mass?
Esperanza uses a 35-mm camera with a standard lens of focal length 70.0 mm to take a photo of her son Sam, Determine the height of the image of Sam on the film
A slender rod with a length of 0.300m rotates with an angular speed of 8.80rad/s about an axis through one end and perpendicular to the rod. What is the induced emf in the rod
q1. throughout a hard sneeze your eyes may shut for 0.41 s. if you are driving a car at 98 kmh during such a sneeze how
An electron is in the second energy level (n=2) of a Hydrogen atom. What is the maximum wavelength of light that it can absorb and be completely ionized
A ball is thrown from the top of a building upward at an angle of 46 degrees to the horizontal and with an initial speed of 30m/s. the speed of the ball just before it strikes the ground
What is the resistance of a 1.7m -long copper wire that is 0.50mm in diameter? (Answer should be in ohms)
Two electrons in an atom are separated by 1.3 × 10?10 m, the typical size of an atom. What is the force between them
A bat flies toward a wall at a speed of5.0m/s. As it flies, the bat emits an ultrasonic sound wave with frequency29.5kHz. What frequency does the bat hear in the reflected wave
A diver shines a light up to the surface of a flat glass-bottomed boat at an angle of 33? relative to the normal. If the indices of refraction of air, water, and glass are 1.0, 1.33, and 1.6 respectively, at what angle does the light leave the glass ..
a baseball pitcher throws a 145 g baseball parallel to the ground with a speed of 36.29 ms in the x direction. the
An oil drop whose mass is determined to be 2.8x10^-15 kg isheld at rest between two large plates separated by 1.0 cm, How many excess electrons does this drop have
Astronomers have discovered a planetary system orbiting the star Upsilon Andromedae, which is at a distance 4.2 1017 m from the earth. what is the minimum necessary aperture diameter that a telescope must have
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