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The position of a car at t= 20 min is x= 12 km. Its position is 69.6km when t=60min. Find the average velocity ofthe car in m/s.
A microscope with an eyepiece lens of focal length 1.90 cm and an objective lens of focal length 1.15 cm is used to examine a section of the brain of a sacrificed rat. The distance between the lenses of the instrument is 24.0 cm and final image is vi..
A bottle containing 5 kg of water at a temperature of 15C is placed in a refrigerator, How much heat is transfered from the water to cool it to 1C
Two point charges q and 4q are at x=0 and x=L, respectively, and free to move. A third charge is placed so that the entire three-charge system is in static equilibrium. What is the magnitude of the third charge? What is the x-coordinate of the thi..
What would be the final temperature of 100g of 16°C water when 107 g of 40°C iron nails are submerged in it? (The specific heat of iron is 0.12 cal/g °C. Here you must equate the heat gained by the water to the heat lost by the nails.)
Valerie is able to do 1200 joules of work in 10seconds. Brett is able to do 5000 joules of work in 50 seconds. Who is more powerful.
A cardinal (Richmondena cardinalis) of mass 4.30×10-2 and a baseball of mass 0.14 have the equal kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of baseball's momentum.
The coefficient of kinetic friction is 0.350. Illustrate what should be the magnitude of vector P , so that the net work done by it and the kinetic frictional force is zero?
A 43.0-N child is in a swing that is attached to ropes 1.60 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
A mass of 0.006 kg is attached to a spring that requires a force of 0.01 N to extend it 0.05 meters greater than its natural length, Find maximum velocity of spring when released from rest
An airplane is flying with a velocity of 93.0 m/s at an angle of 22.0^circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
Two 10-cm-diameter charged rings face each other, 18.0cm apart. Both rings are charged to + 50.0nC . What is the electric field strength at the center of the left ring
Find the distance from the mirror to the point where the reflected rays meet.
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