Physics

Six spaceships with rest lengths L0 zoom past an intergalactic speed trap. The officer on duty records the speed of each ship, v. (No ship is going in excess of the stated speed limit of c , so she doesnt have to pull anyone over for a ticket. )
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A landscaper uses 15. 00 newtons of force to push a lawn mower. How much work, in joules, does the landscaper use to move the lawn mower?
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A is a sphere that is traveling with velocity of (3,7)m/s and had a mass of 5 kg .it collide with sphere B and both particle move together with velocity of (1,4)m/s after the collision. Sphere B has a mass of 4 kg . Find the velocity of B before the collision
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Q8 (10pts)You are working with cartesian unit vectors and in the plane of the board. Your friend is introducing anew unit vector = 0.52 + q, but isn't sure what value q should have. Solve for q and make arecommendation for what value they could use. If you determine more than one possible value for g,mention this in your recommendation.
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a) Two asteroids collide and stick together. The first asteroid has mass of 18 10^3 kg and is initially moving at 780 m/s. The second asteroid has mass of 23 10^3 kg and is moving at 1050 m/s. Their initial velocities made an angle of 15 with respect to each other. What is their final speed and direction with respect to the velocity of the first asteroid?
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The radium isotope 223Ra, an alpha emitter, has a half-life of 11. 43 days. You happen to have a 1. 0 g cube of 223Ra, so you decide to use it to boil water for tea. You fill a well-insulated container with 460 mL of water at 16 and drop in the cube of radium. How long will it take the water to boil?Express your answer with the appropriate units
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Suzie Skydiver with her parachute has a mass of 46kg. Before opening her chute what force of air pressure will she have when she reaches terminal velocity
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A cyclist moves from point a to point f in forty five minutes. calculate.a. the total distance travelledb. the final displacementc. the speed the cyclist
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Suppose the four energy levels in question 78 were somehow evenly spaced. How many spectral lines would result?one from 4 to ground, one from 3 to ground, and one from 2 to ground. The transition from 4 to 3 would involve the same difference in energy and be indistinguishable from the transition from 3 to 2, or from 2 to ground. Likewise, the transition from 4 to 2 would have the same change in energy as the transition from 3 to ground
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In a physics lab, a group of students are provided with a sphere of unknown mass, a roll of string, a ring stand, and measuring devices that are commonly found in a physics lab. The students must graphically determine the acceleration due to gravity near earths surface by putting the sphere into simple harmonic motion.
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coherent microwaves of wavelength 5.00 cm enter a long, narrow window in a building otherwise essentially opaque to the microwaves. if the window is 45.0 cm wide, what is the distance from the central maximum to the first-order minimum along a wall 6.50 m from the window?
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The arrows in this diagram are meant to show how gravitational equilibrium works in the sun. What do the different colors and different arrow lengths represent?.
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Keshaun and myra went to the amusement park last summer. They noticed that the roller coaster was slower on the way up but went fast as they were on there way down. Keashaun's favorite part was the first drop, but myra liked when they were going a little slower
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1. A small block, with a mass of 0. 05 kg compresses a spring with spring constant 350 N/ma distance of 4 cm. It is released from rest, then slides around the loop and up the inclinebefore momentarily comes to rest at point A. The radius of the loop is 0. 1 m. a. Find the elastic potential energy of the block at point D. b. Find the velocity of the block at point C. Find the velocity of the block at the top of the loop at point B. d. What is the height of point A? e. Is any work done by the block? Why or why not?
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Explain how meteorologists use weather data to predict the probability of a catastrophic wildfire.
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As soil particle size decreases from silt to clay, the field capacity __________ and the available water __________.
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2) A pallet is pulled 125 m across a floor by a cable that makes an angle of 45 with thefloor. If 1150 N is exerted on the cable, how much work is done?
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The oxygen molecule has a total mass of 5. 30 10-26 kg and a rotational inertia of 1. 94 10-46 kg-m2 about an axis through the center perpendicular to the line joining atoms. Suppose that such a molecule in a gas has a mean speed of 500 meters/sec and that its rotational kinetic energy is two-thirds of its translational kinetic energy. Find its average angular velocity
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Why can a lunar eclipse only happen during a full moon?.
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What does it mean to you to be healthy? In your answer, give three attributes that you believe healthy people have.
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What is the S-P difference (sec)?What is the amplitude (mm)?What is the distance (km)?What is the magnitude (M)?
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An engine using 1 mol of an ideal gas initially at 18.7 L and 370 K performs a cycleconsisting of four steps:1) an isothermal expansion at 370 K from18.7 L to 33 L ;2) cooling at constant volume to 209 K ;3) an isothermal compression to its originalvolume of 18.7 L; and4) heating at constant volume to its originaltemperature of 370 K .Find its efficiency. Assume that theheat capacity is 21 J/K and the universal gas constant is 0.08206 L atm/mol/K =8.314 J/mol/K
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suppose you have a car with a 105-hp engine. how large a solar panel would you need to replace the engine with solar power? assume that the solar panels can utilize 20% of the maximum solar energy that reaches the earth's surface (1000 w/m2). 1 hp = 746 w.
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What is the resolution of the stopwatch the team coach uses to time the ball?
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