Physics

if one object has twice as much mass as another object, it also has twice as much inertia. volume. acceleration due to gravity. velocity. all of these
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if a disk in the lower spine supports half the weight of a 72 kg person, by how many mm does the disk compress?
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An empty beer can has a mass of 50 g, a length of 12 cm, and a radius of 3.3 cm. Assume that the shell of the can is a perfect cylinder of uniform density and thickness.(a) What is the mass of the lid/bottom?(b) What is the mass of the shell?(c) Find the moment of inertia of the can about the cylinder's axis of symmetry.
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A sound wave has a frequency of 687 Hz in air and a wavelength of 0.49 m. What is the temperature of the air? Relate the speed of sound in air to temperature in units of Kelvin, but answer in units of Celsius. Assume the velocity of sound at 0C is 333 m/s.Answer in units of deg C.
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(a) which draws more current, a 100-w light bulb or a 75-w bulb? (b) which has the higher resistance, a 100-w light bulb or a 75-w bulb?
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in which of the following situations do the forces on the body sum to zero? vertical forces of -80 n, 30 n, and 40 n horizontal forces of -50 n, -20 n, 40 n, and 30 n neither a nor b both a and b need more information to calculate
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on a coordinate plane, vector v has a magnitude of 6 miles per hour in a northwesterly direction. what are the magnitude and direction of
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what types of energy changes occur during each section of the cooling curve. when is kinetic energy decreasing? when is potential energy decreasing?
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suppose you stare at a static red square for two minutes. you then move your eyes back and forth across a white wall. what do opponent-process theory and corollary discharge theory predict you will experience?
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an n-type piece of silicon experiences an electric field equal to 0.1v/m. (a) calculate the velocity of electrons and holes in this material
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if the club and ball are in contact for 1.80 ms , what is the magnitude of the average force acting on the ball?
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the intensity of sound in a typical classroom is approxiamtely 10^-7 w/m2. what is the sound level for this noise/
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Student A has a mass of 95 kg and student B has a mass of 82 kg. If their centers of mass are0.6 meters apart, what will be the gravitational force each student exerts on the other?Round your answer to the nearest whole number.
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a 5100 kg open train car is rolling on frictionless rails at 25 m/s when it starts pouring rain. rain falls vertically. a few minutes later, the car's speed is 23 m/s . What mass of water has collected in the car?
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a stone and a block are on an incline as shown in figure. the stone is at rest. how many forces act on the stone?
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if the ball is in contact with the wall for 0.0948 s, what is the magnitude of the average force exerted on the ball by the wall?
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Two parallel wires are near each other as shown in the figure. Wire 1 carries current i, and wire 2 carries current 2i. Which statement about the magnetic forces that the two wires exert on each other is correct?a. Wire 1 exerts a stronger force on wire 2 than wire 2 exerts on wire 1b. The two wires exert no force on each otherc. Wire 2 exerts a stronger force on wire 1 than wire 1 exerts on wire 2d. The two wires exert attractive forces of the same magnitude on each othere. The two wires exert repulsive forces of the same magnitude on each other
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a bowling ball (2.6kg) is going down a lane at 5m/s to the right attempting to stike a lone stationary pin (0.3kg). the ball bounces back at a velocity of 1 ,/s at an angle of 30 below the horizontal. what is teh final velocity and direction of the pin
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what do astronomers mean when they talk about the seeing conditions at a potential observatory site?
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why does the pressure rise as the volume of a cylinder filled with a gas is decreased by a piston? multiple choice question. gas particles move faster in a smaller volume. collisions with the walls are more frequent. collisions of gas particles with each other are more frequent.
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when 171 v is applied across a wire that is 11 m longa nd has a 0.44 mm radius, the magnitude of the current density is 1.3 x 10^4
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the pilot of an airplane notes that the compass indicates a heading due west. the airplane's speed relative to the air is 100 km/h. the air is moving in a wind at 31.0 km/h toward the north. find the velocity of the airplane relative to the ground.
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what does pluto most resemble? what does pluto most resemble? a terrestrial planet a jovian planet a comet
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through what potential difference should electrons be accelerated so that their speed is 1.2 % % of the speed of light when they hit the target?
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