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A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.5 m/s2; after 4.1 second he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant velocity of 68.6 meter per second overtakes and passes the entering car. The entering car maintains its acceleration. Find how much time is required for the entering car to catch up with the other car?
An object that is 35 cm in front of a convex mirror has an image located 14 cm behind the mirror. How far behind the mirror is the image located when the object is 28 cm in front of the mirror?
A proposed space station includes living quarters in a circular ring 52.0 m in diameter. At what angular speed should the ring rotate
Two atomic clocks are synchronized while on Earth before one is launched (within a GPS satellite) into a medium-altitude Earth orbit. estimate the time difference between the two atomic clocks
An airoplane takeoff speed is 320km/h. if its average acceleration is 2.9m/s^2, how long is it on runway after starting its takeoff roll.
a child sits on the outer edge of a 18 m radius merry-go-round. if the parent applies a tangential acceleration of 2.5
Two negative point charges are separated by 16 and feel a mutual repulsive force of 1.55. The charge of one is three times that of other.
A compound microscope has a barrel whose length is 16.4 cm and an eyepiece whose focal length is 1.7 cm. What focal length must the objective have so the angular magnification of the microscope is -250
A 120 kg cannon shoots a 0.5 kg ball with a velocity of 80.0 m/s. What is the recoil velocity of the cannon
a person who weighs 705 n is riding a 98-n mountain bike. suppose the entire weight of the rider and bike is supported
A strong electromagnet produces a uniform magneticfield of 1.60 T over a cross-sectional area of 0.200 m2.We place a coil having 210 turns and atotal resistance of 23.0 Ω aroundthe electromagnet.
A point is located at r = 42mmi - 71mmj + 90mmk. It is first rotated about the x-axis by +82o, and then rotated about the z-axis by -35o
What is the magnitude of the free-fall acceleration of a ball (mass m) due to the Earth's gravity at an altitude of 7R, where R is the radius of the Earth
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