Physics

Calculate the annual potential energy contained in the water that is held back by the dam. Assume an average height of the water, h of 100.0 m. Express the answer in GJ (at least three significant figures).
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In what fundamental way did the work of Galileo differ from his predecessors who had thought about the sky?
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If you are at the equator and driving north at a speed of 90 m/s, what is direction of the magnetic force on your head? 1. north 2. south 3. downward 4. east 5. upward 6. west 7. There is no force.
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A bobsledder pushes her sled across horizontal snow to get it going, then jumps in. After she jumps in, the sled gradually slows to a halt. What forces act on the sled just after she's jumped in?a) Gravity and kinetic frictionb) Gravity and normal forcec) Gravity and the force of the pushd) Gravity, a normal force, and kinetic frictione) Gravity, a normal force, kinetic friction, and the force of the push
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Background noise affects hearing tests. In the ticking watch test, what type of result, in terms of auditory sensitivity, would you have recorded if moderate background noise were present?
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Your cell phone works as both a radio transmitter and receiver. Say you receive a call at a frequency of 880.65 MHz. What is the wavelength in meters?
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Help please!What is the fundamental (smallest) unit of charge possible and where does it come from?
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Calculate the linear momentum of photons of wavelength 740 nm. What speed does anelectron need to travel to have the same linear momentum?
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A particle of mass 73 g and charge 67 C is released from rest when it is 47 cm from a second particle of charge 25 C. Determine the magnitude of the initial acceleration of the 73 g particle. Answer in units of m/s 2 .
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The moving continents affect all subsystems on Earth. Which sentence identifies a potentially negative consequence of shifting continents?
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A battery with an emf of 24.0 V is connected to a resistive load. If the terminal voltage of the battery is 16.1 V and the current through the load is 3.90 A, what is the internal resistance of the battery?
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HELP FASTWhat is the potential energy of the 2 kg ball that is sitting on top of the 40 meterbuilding?0803784O80 N784 N
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A manometer containing oil (rho = 850 kg/m3) is attached to a tank filled with air. If the oil-level difference between the two columns is 110 cm and the atmospheric pressure is 98 kPa, determine the absolute pressure of the air in the tank.
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Several processes form metal ore. Match each process to its description. volcanic activity weathering hydrothermal energy Rocks break down as they interact with air and water. arrowRight Density differences and other factors cause metals to concentrate in igneous rocks. arrowRight Seawater heats up from contact with hot rock, and metals dissolve in it. The water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowRight
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Which statement best describes the weather shown by the blue triangles on a line on a weather map?A cold front can cause heavy rain, thunder, and lightning.A warm front brings drizzly weather.A stationary front may produce rainy or snowy weather for several days.An occluded front can cause light to heavy precipitation that may last several days.
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Two trains are traveling side-by-side along parallel, straight tracks at the same speed. In a time t, train A doubles its speed. In the same time train B increases its speed by a factor of 5.42. By what factor is the distance traveled by train B in time t greater than the distance traveled by train A in the same time t?
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What is the kinetic energy of a 3 kg object moving at 4 m/s?
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A vinyl record makes 90 rotations in a minute. The diameter of the disk is 34 cm. Find the linear velocity of a point on the circumference of the disk in m/s.
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A solid conducting sphere with radius RR that carries positive charge QQ is concentric with a very thin insulating shell of radius 2RR that also carries charge QQ. The charge QQ is distributed uniformly over the insulating shell. A. Find the magnitude of the electric field in the region 02R. Express your answer in terms of the variables R, r, Q, and constants and 0.
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A satellite in outer space is moving at a constant velocity of 20.5 m/s in the +y direction when one of its on board thruster turns on, causing an acceleration of 0.310 m/s^2 in the +x direction. The acceleration lasts for 49.0 s, at which point the thruster turns off.(a) What is the magnitude of the satellite's velocity when the thruster turns off?(b) What is the direction of the satellite's velocity when the thruster turns off? Give your answer as an angle measured counterclockwise from the +x-axis.
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A 0.50 kg body oscillates in SHM on a spring that, when extended 2.0 mm from its equilibrium position, has ,an 8.0 N restoring force. What are (a) the angular frequency of oscillation, (b) the period of oscillation, and (c) the capacitance of an LC circuit with the same period if L is 5.0 H?
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How many revolutions per minute would a 26 m -diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point?
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A 200 kg weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 30 m/s2 for 35 s , then runs out of fuel. Ignore any air resistance effects. a. What is the rocket's maximum altitude? b. How long is the rocket in the air? c. Draw a velocity-versus-time graph for the rocket from liftoff until it hits the ground.
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What is spectroscopy?
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