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Q. A 2.1 x 10^3 kg car starts from rest at the top of a driveway that's sloped at an angle of 20.0 degrees with the horizontal. An avg. friction force of 4.0 x 10^3 impedes the cars motion so that the cars speed at the bottom of the driveway is 3.8m/s. What is the length of the driveway?
Q. An astronaut in a satellite says she can just barely resolve two point sources on the Earth, 110.0 km below. Assume λ=540.0 nm, and the pupil diameter of the astronaut's eye to be 5.20 mm.
Calculate their angular separation.
What is the magnitude of the runner's total displacement . What is the phase difference between the two waves next they reach the observer.
Calculate the energy associated with the magnetic field of a 191 turn solenoid in which a current of 2.44. A produces a magnetic flux of 3.74 x 10-4 T • m2 in each turn.
A proton travels with the speed of 8.34×105 m/s at an angle of 32.3° with the direction of a magnetic field. The field exerts a force of 3.00×10-17 N on the proton. What is the strength of the field.
A small car is pushing a larger truck that has a dead battery. The mass of the truck is twice as large as the mass of car. At one instant of time the car and truck both have an acceleration of 3.5 m/s2. Which of the following statements is true? D..
A car travelling at 37 {rm m/s} runs out of gas while travelling up a 7.0{rm ^ {circ}} slope. How far would it coast before starting to roll back down.
while the surface temperature can reach 320K. These data imply that Venus has a "thicker" atmosphere at its surface than does the earth that means that the number of molecules per unit volume (N/V) is greater on the surface of Venus than on the ea..
A helicopter is ascending vertically with a speed of 9 m/s. At a height of 200 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach ground.
An indestructible bullet 1.85 cm long is fired straight through a board that is 11.10 cm thick. The bullet strikes board with a speed of 455m/s and emerges with a speed of 279m/s. (To simplify, suppose that the bullet accelerates only while the fr..
When the Sun is straight overhead, a hawk dives toward the ground with the constant velocity of 4.50 m/s at 52° below the horizontal. Compute the speed of her shadow on the level ground.
A typical Major League fastball is thrown at about 99 mph and with a spin rate of 103 rpm. If the distance between the pitcher's point of release and the catcher's glove is exactly 65.5 ft, how many full turns does the ball make between release and c..
How numerous atoms does each hand contain
What is value of Earths magnetic field
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