Physics

A 14.0 gauge copper wire of diameter 1.628 mmmm carries a current of 12.0 mAmA . Part A What is the potential difference across a 2.25 mm length of the wire? VV = nothing VV SubmitRequest Answer Part B What would the potential difference in part A be if the wire were silver instead of copper, but all else was the same?
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A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 0.0127 m and a frequency of 2.55 Hz. What is the maximum speed of the needle?
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A 2-ft3 tank contains a gas at 2 atm(g) and 60 oF. This tank is connected to a second tank containing the same gas at atmospheric pressure and 60 oF. The two tanks are connected and allowed to reach equilibrium. The final conditions are measured to be 1 atm(g) and 60oF. What is the volume of the second tank
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An airplane pilot wishes to fly due west. A wind of 80.0 km/h (about 50 mi/h) is blowing toward the south. (a) If the airspeed of the plane (its speed in still air) is 320.0 km/h (about 200 mi/h), in which direction should the pilot head? (b) What is the speed of the plane over the ground? Draw a vector diagram.
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what would the velocity of a bullet that strikes a tin can 350 meters away in 0.25 seconds
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If the separation between the first and the second minima of a single-slit diffraction pattern is 6.0 mm, what is the distance between the screen and the slit?
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Calculate the force of gravity between two planets with masses 5 x 1023 kg and 1 x 1022 kg when the distancebetween them is 7 x 1016 m. Do not use scientific notation. Round to one decimal.
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During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive force of 115 N to the tire's rim. The mass of the wheel is 1.70 kg and, for the purpose of this problem, assume that all of this mass is concentrated on the outside radius of the wheel. The diameter of the wheel is 50.0 cm. A chain passes over a sprocket that has a diameter of 9.50 cm. In order for the wheel to have an angular acceleration of 4.90 rad/s2, what force, in Newtons, must be applied to the chain? (Enter the magnitude only.) N
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A point charge gives rise to an electric field with magnitude 2 N/C at a distance of 4 m. If the distance is increased to 20 m, then what will be the new magnitude of the electric field?
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a. How many excess electrons must be distributed uniformly within the volume of an isolated plastic sphere 25.0 cm in diameter to produce an electric field of 1350 N/C just outside the surface of the sphere.b. What is the electric field at a point 10.0 cm outside the surface of the sphere?
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answers If visible light and radio waves are both examples of electromagnetic waves, why cant we see radio waves?
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A flea jumps straight up to a maximum height of 0.490 m . How long is the flea in the air from the time it jumps to the time it hits the ground?
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A 1.75 F capacitor and a 6.00 F capacitor are connected in series across a 3.00 V battery. How much charge (in C) is stored on each capacitor?
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In the SI system of units, dynamic viscosity of water at temperature T (K) can be computed from =A10B/(T-C), where A=2.410-5, B=250 K and C=140 K. (6 points) (a) Determine the dimensions of A. (b) Determine the kinematic viscosity of water at 20C. Express your results in both SI and BG units.
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Which of the following is most closely related to the unit of time that humans call the month? A. the rotation of the Earth once on its axis B. the cycle of the Moon through all its phases C. the rotation of the Sun once on its axis D. the revolution of the Earth once around the Sun Never mind found the answer
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E14. A ball rolls off a table with a horizontal velocity of 5 m/s. Ifit takes 0.6 seconds for it to reach the floor,a. What is the vertical component of the ball's velocity justbefore it hits the floor? (Use g = 10 m/s2.)b. What is the horizontal component of the ball's velocityjust before it hits the floor?
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A hydrogen atom has a single proton at its center and a single electron at a distance of approximately 0.0539 nm from the proton. a. What is the electric potential energy in joules?b. What is the significance of the sign of the answer?
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When a tractor moves with uniform velocity its heavier wheel rotates slowly than its lighter wheel why?
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If you push a block of wood under the water if a force on your hand. explain.
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Suppose that the voltage of the battery in the circuit is 3.3 V, the magnitude of the magnetic field (directed perpendicularly into the plane of the screen) is 0.66 T, and the length of the rod between the rails is 0.19 m. Assuming that the rails are very long and have negligible resistance, find the maximum speed attained by the rod after the switch is closed.
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A net force of 200 N acts on a 100-kg boulder, and a force of the same magnitude acts on a 130-g pebble during the same amount of time. Which object has the greatest value for each of these quantities?
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What is the cost of using an electric iron rated 340v,1000w for 24hrs. If electric energy costs 3000tsh per unit?(1unit=1kwh)
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A stainless-steel-bottomed kettle, its bottom 22cm cm in diameter and 2.2 mmmm thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 800 WW .What is the temperature of the bottom surface of the kettle? Thermal conductivity of stainless steel is 14 W/(m?K).
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A train travels due south at 25 m/s (relative to the ground) in a rain that is blown toward the south by the wind. The path of each raindrop makes an angle of 66 with the vertical, as measured by an observer stationary on the ground. An observer on the train, however, sees the drops fall perfectly vertically. Determine the speed of the raindrops relative to the ground.
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