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1. A wire has a cross-sectional area of 5.5×10-6 m2. In a time of 3.7 s, 5.8 C of charge flows through it. What is the magnitude of the current density in the wire?
2. The solar wind consists of particles, including protons, that flow outward from the Sun. Near the Earth, the density of protons in the solar wind is 8.72×10-6 protons/cm3, speeding through space at 475 km/s. What is the magnitude of the current density of protons near the Earth?
The center of mass of a proton with mass 1.673·10-27 kg and alpha particle with mass 6.645·10-27 kg is moving with a speed of 6.993×105 m/s
The electric field midway between two equal but opposite point charges is 730 N/C, What is the magnitude of the charge on each
An iron-core solenoid is 43cm long and 1.7cm in diameter, and has 720 turns of wire. What is the permeability %u03BC at this high field strength
What is the height of the power line and the initial speed of the ball?
A child pulls an imaginary friend in a wagon at constant speed for 10m with a force of 16N. how much work does the child do
A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +13.2 m/s in a time of 27.9s. What is the tension in the hitch that connects the trailer to the car
A pot containing 730 g of water is placed on the stove and is slowly heated from 29°C to 86°C. Calculate the change of entropy of the water
Create a graph corresponding to the stone vertical velocity
A proton traveling 3.0 E 6 m/s enters half way in a capacitor and travels 2.00 E -3 meters before crashing into the bottom plate, What is the voltage applied to the capacitor from the battery
What is magnitude of the angular momentum
In Fig. 23-45, a small, nonconducting ball of mass m =1.4 mg and charge q = 2.9 x 10-8 C (distributeduniformly through its volume) hangs from an insulating thread thatmakes an angle θ = 44° with a vertical, uniformly chargednonconducting sheet (sh..
A 0.310-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -17.2 °C. In 4.30 minutes, the ice thickens by a small amount. Calculate the number of millimeters by which the ice thickens
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