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A car travels with a velocity of 20m/s for 6 second. It then uniformly brought to rest in 4 seconds. Draw a velocity against The sun radiates energy at a rate of 4 x 10^26 joules/second. Calculate the lifetime of the sun if it began shining with 8 x 10^36 joules of rotational energy. On the basis of your calculations, does this explanation for the sun's energy production seem reasonable? Explain. time graph
A 210 g piece of ice at 0°C is placed in 410 g of water at 22°C. The system is in a container of negligible heat capacity and is insulated from its surroundings. (a) What is the final equilibrium temperature of the system? (b) How much of the ice ..
How long will it before the friend hear the speed of a sound
What is the angular separation of two spectral lines of wavelengths 439 nm and 395 nm formed in order m=2 with a 367 line/mm grating
The dielectric strength of air, E = 3.0×106 V/m, is the maximum field that air can withstand before it breaks down and becomes conducting. How much charge can be placed on a spherical conductor
A 0.450-kg ice puck, moving east with a speed of 5.26m/s , has a head-on collision with a 0.950-kg puck initially at rest. What is the speed of the 0.950-kg puck after the collision
In a women's 100-m race, accelerating uniformly, Laura takes 1.81 s and Healan 3.06 s to attain their maximum speeds, which they each maintain for the rest of the race.
An ambulance with a siren emitting a whine at 1550 Hz overtakes and passes a cyclist pedaling a bike at 2.39 m/s How fast is the ambulance moving
A Child with a mass of 35.0 kg climbs onto a water slide that is 2.00 m above the water. What is the work done by the normal force on the child
A person pulls a 30kg crate to the right along a rough horizontal surface. He pulls with a force of 200N at an angle of 25 degrees from the horizontal. Find the total force on the crate
A generator delivers an AC voltage of the form ?v = (90 V) sin (95?t) to a capacitor. The maximum current in the circuit is 1.50 A. Find the following. (a) rms voltage of the generator V (b) frequency of the generator Hz (c) rms current A (d) reactan..
two point charges are placed on the axis as follows charge 3.80 is located at 0.185 and charge 4.75 is at -0.285 .
Assume that a 7.0 cm diameter, 120 W light bulb radiates all its energy as a single wavelength of visible light. Estimate the electric field strength at the surface of the bulb
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