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Question1
At a certain instant of time, a toy car is travelling at a constant speed of v0 to the right, while a distance D ahead is another toy car starting from rest and travelling to the left with constant acceleration a. The cars are moving along the similar line, directly toward each other. At what time do they collide, in terms of D, v0 and a?
Question2
A car in stop-and-go traffic starts at rest moves forward 19 m in 8.0 seconds, then comes to rest again. 1.) What distance does the car cover in first 4.0 seconds of its motion? Express the answer using two significant figures. 2.) What distance does the car cover in last 2.0 seconds of its motion? Express the answer using two significant figures. 3.) What is constant speed V that characterizes a middle portion of its motion? Express the answer using two significant figures.
The drawing shows a rectangular block of glass (n = 1.52) surrounded by a liquid with n = 1.73. At what angle does the ray leave the glass at point B
Explain by how much upward force does each support exert on the beam? (Enter your answer for support 1 first, followed by your answer for support 2.)
A proton accelerates from rest in a uniform electric field of 524 N/C. What is the magnitude of the acceleration of the proton
Calculate the angular momentum of the Earth about its own axis, due to its daily rotation. Assume that the Earth is a uniform sphere
What is the main possible displacement of the shopper
A toroidal solenoid has a mean radius of 11.0 cm and a cross-sectional area of 5.00 cm2 and is wound uniformly with 100 turns. A second coil with 500 turns is wound uniformly on top of the first. What is the mutual inductance of these coils.
A block of mass 1.60 kg is connected to a spring of spring constant 149 N/m which is then set into oscillation on a surface with a small coefficient of kinetic friction. find the total energy was lost in the first full oscillation
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of -0.40 rad/s^2 has an angular velocity of 1.5 rad/s, What is the angular position of the wheel at t = 2.0 s
An office window has dimensions 3.4 m by 1.7 m. As a result of the passage of a storm, the outside air pressure drops to 0.95 atm, but inside the pressure is held at 1.0 atm.
Two equally charged, 1.00 {\rm g} spheres are placed with 2.00 {\rm cm} between their centers. What is the magnitude of the charge on each sphere
A heat engine runs in the cycle A to B to C and back to A. The pressure at C is 200 kPa. The volume at C is 20 liters.
2.30×106 atoms are excited to an upper energy level at t=0s. At the end of 10.0ns, How many photons have been emitted
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