What is the current in the circuit
a circuit contains six 240 ohm lamps, 60 w bulbs, and a 10 ohm heater sonnected in parallel. the voltage across the curcuit is 120 v. what is the current in the circuit .
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You measure the mass of a physics textbook to be 3.20±0.07 kg, and use this value to estimate the total mass of 700 identical physics textbooks in the bookstore. What is the absolute uncertainty in your estimate of the total mass?
A crate of mass m = 27 kg rides on the bed of a truck attached by a cord to the back of the cab as in the figure. The cord can withstand a maximum tension of 53 N before breaking. Neglecting friction between the crate and truck bed, find the maxi
What should be the spring constant k of a spring designed to bring a 1500 {rm kg} car to rest from a speed of 90 {rm km/h} so that the occupants undergo a maximum acceleration of 5.0g?
In an ultra-high-vacuum system, the pressure is measured to be 1.00 X 10-10 torr (where 1 torr = 133 Pa). Assuming the molecular diameter is 3.00 % 10-10 m, the average molecular speed is 500 m/s, and the temperature is 300 K, find
A spherical steel ball bearing has a diameter of 2.540 cm at 24°C. (a) What is the diameter when its temperature is raised to 82°C?
A circular surface with a radius of 0.067 m is exposed to a uniform electric field of magnitude 1.92 x 104 N/C. The electric flux through the surface is 56 N·m2/C. What is the angle between the direction of the electric field and the normal
Light is incident upon the the surface of water in a level, flat-bottomed glass dish at an angle of 50 degrees to the normal. At What angle will the light emerge from the bottom of the dish? The refractive indices of water and glass are 1.33 and 1
A planet of mass 7 × 1024 kg is at location ‹ -5 × 1011, 7 × 1011, 0 › m. A star of mass 8 × 1030 kg is at location ‹ 4 × 1011, -5 × 1011, 0 › m. What is the force exerted on the plan
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