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The potential difference between the terminals of a battery is 12V when measured directly using a voltmeter. When the battery is connected to a load of 240?, the reading of the voltmeter becomes 9.6V. What is the internal resistance of the battery? What load resistance should be used so the battery delivers the most power to it? What is this maximum power?
What is the spring constant (k) of the bungee cord.At what time will the object be moving with a speed of 15 m/s.
what is the volume of an iron atom. What is the ratio of the mass density of girder A to the mass density of girder B.
A robot probe drops a camera off the rim of a 239m high cliff on Mars, where the free fall acceleration is -3.7m/s^2. Find out the velocity with which the camera hits the ground.
A car is driven 155 km west and then 75 km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
If 40 g of hot water at 80°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? Explain how much ice must melt in order to cool the hot water down to this temperature?
If a car traveling at 66 km/h will skid 20 m as its brakes lock, how far will it skid if it is traveling at 120 km/h when its brakes lock.
A wooden raft has a mass of 92kg. When empty it floats in water (density 1000 kg/m3) with 48 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
A 250-g ball collides with a wall. The ball's velocity and the force exerted on the ball by the wall. What is v_{{rm{f}}x}, ball's rebound velocity.
A 30-meter steel tape is correct at a temperature of 20.0(C). The distance between two points, as measured by this tape on a day when the temperature is 5 (C), is 25.970m. What is the true distance between the points?
Presume a spherical planet P has a uniform density of 4.72 x 10^3 kg/m^3 and a radius R = 3604km. For a parcel that weighs 64N on the surface of the spherical Earth.
What is the potential difference measured by voltmeter
The shell, with radius R and negligible thickness, has net charge - 4.00 q. Find out an expression for the electric field strength outside the sphere, r> R.
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