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What is the net work done on the canister by the three forces during the first 4.00 m of displacement?
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What is the average horizontal component of force exerted on his feet by the ground during acceleration?
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Two charges, one of 2.50μc and the other of -3.50μc, are placed on the x-axis, one at the origin and the other at x = 0.600 m. find the position on the x-axis where the net force on a small charge +
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The first artificial satellite to orbit the earth was sputnik i, launched october 4, 1957. the mass of sputnik i was 83.5 kg, and its distances from the center of the earth at apogee and perigee were
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The compressor of an air conditioner draws an electric current of 15.7 a when it starts up. if the start-up time is 1.55 s long, then how much electric charge passes through the circuit during this pe
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Sam, whose mass is 71 kg , takes off across level snow on his jet-powered skis. the skis have a thrust of 190 n and a coefficient of kinetic friction on snow of 0.1. unfortunately, the skis run out of
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Over a certain region of space, the electric potential is v = 6x − 2x2y + 7yz2. (a) find the expressions for the x, y, z components of the electric field over this region. (use any variable or symbo
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Light from a helium-neon laser (λ=633nm) passes through a circular aperture and is observed on a screen 4.90 m behind the aperture. the width of the central maximum is 2.40 cm . part a what is the di
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The length of each of the bonds between the atoms of a molecule of nitrogen (N2) is 0.142 nm. The mass of a nitrogen atom is 2.32 × 10−11 pg.Determine the moment of inertia of the molecule about an
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A closed, rigid tank fitted with a paddle wheel contains 0.1 kg of air, initially at 300K, 0.1 MPa. The paddle wheel stirs the air for 20 minutes, with the power input varying with time according to W
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The public is not yet able to purchase hydrogen fuel cell powered cars because engineers have to determine how the cars perform
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ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. A person walks along a road 2 miles and rests. Then taking another road, he travels 3.000 mil
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When two charge producers with different surface materials are rubbed together to create a charge imbalance, how will the electric charge on one of the producers compare to the electric charge on the
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Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positiv
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A child traveling 5m/s on a sled passes her younger brother. If her average acceleration on the sledding hill is 2m/s square, how fast is she traveling when she passes her older brother 4s later?
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A policeman starts giving chase 60 seconds after a stolen carzooms by at 108 km>hr. At what minimum speed should hedrive if he has to catch up with the driver before he managesto get onto an expresswa
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If a ball is given an initial speed of 15 m/s on a horizontal, frictionless surface, how fast will the ball be rolling in 5 seconds?
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A rock dropped on the moon will increase its speed from 0 m/s to 4.9 m/s in about 3 seconds. what value do you calculate for the magnitude of the acceleration of gravity on the moon
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1) Which situation is an example of transferring heat by means of convection? A) the sun warming the earth B) the weather patterns outside C) you toasty-warm in some footy pajamas D) you accidenta
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A particle is located at the vector position r = (3i+2j) m and the force acting on it is F = (2i+3j) N . The torque of the force about the origin is
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A skier with a potential energy of 137,200 j waits on top of a ski jump that is 200 m high what is the mad as of the skier
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The main difference between the internal combustion engine and the diesel engine is that the diesel engine A. does not utilize pistons. B. does not have a crankshaft. C. has no ignition system. D.
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The density of atmosphere (measured in kilograms/meter3) on a certain planet is found to decrease as altitude increases (as measured from the planet's surface). What is the type of relationship betwee
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Suppose you are building a series circuit with a battery and a small light bulb and you run out of wire what common objects could you use to connect the battery to the light bulb explain please. Thank
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a basket player releases the ball 7 ft above the floor when he is 30 ft from the basket. The ball goes through the rim of the basket (which is 10 ft above the floor) 1.5 seconds after release. Find th
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If the pitch of the sound coming out of a speaker increases, which statement is true about the sound wave?
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Charge q2 is 2.5 *10^-9 and charge q1 has mass .20 g. the separation r is 5 cm, and the angle is 15 degree. find q1 ( magnitude and sign)
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In their work on collision, Trautz and Lewis explained how chemical reactions occur and why they have different reaction rates. This work is an example of a theory because it is a well-tested, widely
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A student weighing 664 N climbs at constant speed to the top of an 12 m vertical rope in 17 s. what is the average power expanded by the student to overcome gravity?
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This morning a 1 - kw electric heater was switched on for one hour. Trace back as far as you can the various forms the energy had before it was used for heat. Assume a coal-fired power plant. Now trac
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In what type of climate do trees produce wider rings? cool and dry warm and wet cool and wet warm and dry
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lab report
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A ball is dropped from the top of a building. The gravitational force is 10 N down, and the force of air resistance is 1 N up. What is the net force?
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I need the lab report about the force table.
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A race car travels on a circular track at an average rate of 125 mi/h. The radius of the track is 0.320 miles. What is the centripetal acceleration of the car? 391 mi/h2 40.0 mi/h2 5,000 mi/h2 48,800
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A sample of 20.0 moles of a monatomic ideal gas (γ = 1.67) undergoes an adiabatic process. The initial pressure is and the initial temperature is The final temperature of the gas is What is the final
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In a summer storm the wind is blowing with a velocity of 8m/s north. Suddenly in 3 seconds, the winds velocity is 23m/s north. What is the winds acceleration?
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A 6 cm object is 8 cm from a convex lens that has a focal length of 5 cm. The image is 4 cm from the lens. The height of the image is cm.
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Calculate the potential, kinetic energy, mechanical energy, velocity, and height of the ball at the various locations.
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If the pitch of a sound decreases and the sound source is moving, is the sound source moving toward or away from the observer
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Standing at the edge of a building of height 9.2m, a woman reaches out over the edge and throws a penny vertically upward. It rises, then falls past her, hitting the ground below 2.5s after release. W
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A person is moving for 2 minutes with a constant speed of 4 m/s how far of a distance would the person cover
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An electric flux of 145 Nm2/C passes through a flat horizontal surface that has an area of 0.635 m2. The flux is due to a uniform electric field. What is the magnitude of the electric field if the fie
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What happens to the velocity of a sound wave in air if the temperature of the air increases? A.The frequency of the sound wave increases. B.The velocity of the sound wave decreases. C.The energy of th
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Vector A makes an angle of 31.7° above the positive x-axis, and vector B makes an angle of 45.0° below the negative x-axis. A = 2.97 units, and B = 1.80 units. Find A + B and A - B.
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If the frequency of a sound wave is 250 hertz and its wavelength is 1.36 meters, what is the wave's velocity? 250 meters/second
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What is the potential energy of the system composed of the three charges q1, q3, and q4, when q1 is at point R? Define the potential energy to be zero at infinity.
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Once cells with nuclei developed, organisms were able to become more complex, which allowed them to adapt to the conditions in more habitats. By which process do organisms adapt and evolve? A) mitosis
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A man out walking his dog makes one complete pass around a perfectly square city block. He starts at point A and walks clockwise around the block
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Use the momentum equation for photons found in this week's notes, the wavelength you found in #3, and Plank’s constant (6.63E-34) to calculate the momentum of this photon: .0E-27 kgm/s 1.8E-27 kgm/s
