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A long, straight current-carrying wire passes through the center of a metal ring, perpendicular to its plane. If the current in the wire increases, is a current induced in the ring? Explain.
8.2mH inductor connected to an ac generator iwth 10V and 620 Hz, what is the peak value of the current supplied by the generator.
A crate of 45.2- tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 335 . After that yo
How much would a 80.0kg person weigh (a) on Mars, where the acceleration of gravity is 3.93 m/s^2, and (b) on Earth's Moon, where the acceleration of gravity is 1.63 m/s^2?
The partition is now removed, and the water expands to fill the entire tank. Determine the final temperature of the water and the volume of the tank for a final pressure of 10 kPa.
A horse canters away from its trainer in a straight line, moving 130 m away in 10.0 s. It then turns abruptly and gallops halfway back in 5.3 s. Calculate its average velocity for the entire trip, u
Consider a 10kg block resting on a frictionless plane inclined 30 o connected by a rope through a pulley to a 10kg block hanging free, as seen in the figure below. What is the direction and magnitu
What is the charge on the inner surface of the small spherical conducting shell, 1cm from the -5pC point charge? Under static conditions, the charge on a conductor resides on the surface of the con
An insulated Thermos contains 160 cm3 of hot coffee at 77.0°C. You put in a 18.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once
A piece of Nichrome wire has a radius of 5.00 10-4 m. It is used in a laboratory to make a heater that uses 2.00 102 W of power when connected to a voltage source of 120 V. Ignoring the effect of te
The loop is then rotated such that the normal rotates in a cone about the field direction at the rate 99 rev/min; angle θ remains unchanged during the process. What is the emf induced in the l
An object with a net charge of 24 µC is placed in a uniform electric field of 630 N/C, directed vertically. What is the mass of this object if it floats in this electric field?
Bob, who has a mass of 82 {rm kg}, can throw a 300 {rm g} rock with a speed of 31 {rm m/s}. The distance through which his hand moves as he accelerates the rock forward from rest until he releases
A rigid tank contains 1.50 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 25.0 atm to 5.00 atm.
A space station, in the form of a wheel 119 m in diameter, rotates to provide an "artificial gravity" of 3.80 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of th
How far from the front of the car will the CM be when two people sit in the front seat 2.80 m from the front of the car, and three people sit in the back seat 3.90 m from the front?
A proton is moving directly east with a velocity of 2.00*10^5m/s and enters a magnetic field of 8.00*10^-3T directed vertically downwards.
Sam, whose mass is 72.0 kg, takes off down a 55.0 m high, 12.0^circ slope on his jet-powered skis. The skis have a thrust of 220 N. Sam's speed at the bottom is 38.0 {rm m/s}. What is the coefficien
A 175 kg horizontal beam is supported at each end. A 295 kg piano rests a quarter of the way from one end. What is the vertical force on the support closest to the piano?
The maximum potential difference across the capacitor during the oscillations is 2.25 V and the maximum current through the inductor is 44.4 mA. What is the inductance L?
A piece of aluminum (specific heat 0.910 kJ/kg 0C) of mass 116 g at 75 0 C is dropped into a Styrofoam cup filled with 118 ml water at 20 0 C. What are the final temperatures of the water and the a
A closed cylindrical tank has a height of 0.77 m. The tank is initially filled with air at a pressure of 2.0 atm. Water is pumped into the tank until the air pressure reaches 6.1 atm. The temperatur
What is the length of a pendulum whose period on the moon matches the period of a 4.50-m-long pendulum on earth?
A 114 watt motor is used to lift a 142 kg container to a height of 5 m. How much time does it take to lift the container with the motor?
The reflected sound is then mixed with the transmitted sound, and 90 beats per second are detected. The speed of sound in body tissue is 1480.