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A bottle containing 2 kg of water at a temperature of 15°C is placed in a refrigerator where the temperature is kept at 4°C. How much heat is transferred from the water to cool it to 4°C?
You place an object with an electrical charge of +0.256 C at a point in space, What is the magnitude and direction of the electric field at that point in space
An artillery shell is fired with a minimal velocity of 470m/s at 50o above the horizontal. To clear an avalanche, it explodes on a mountain side 38 s after firing.
Determine the magnitude of the total initial momentum of the two-block system. Find , the magnitude of the final velocity of the two-block system. What is the change in the system's kinetic energy due to the collision?.
The heating element of a simple heater consists of a 2.0--long, 0.70--diameter nichrome wire. The heating element of a simple heater consists of a 2.0--long, 0.70--diameter nichrome wire.
With two resistors of resistances of 16(ohms) and 24(ohms) are connected in parallel. Find the equivalent resistance of the network, and the current in each resistor
find the angular speed after the grindstone. what must be its minimum mass so that material on its surface remains in place during the rapid rotation.
The occupant of a small vechical hears a frequency of 1.5x10^3 Hz emitted from a stationary space buoy, What is the speed of sound on the planet
A slingshot fires a pebble from the top of a building at a speed of 20.00 m/s. The building is 28-m tall. Ignoring air resistance, find out the speed with which pebble strikes the ground when the pebble is fired (a) horizontally (b) vertically str..
A 4000 kg lunar lander is in orbit 50 km above the surface of the moon. How much work must the thrusters do
Unpolarized light passes through two polarizers in turn with polarization axes at 33° to one another. What is the fraction of the incident light intensity that is transmitted
The centers of a 15kg lead ball and a 50g lead ball are separated by 10cm, What is the ratio of this gravitational force to the weight of the 50g ball
Two sqaures of wire like that of above are placed side by side on a table with a distance of 8 cm between the closest sides of the two sqaures, What is the resulting force between the two squares
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