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Q1. Dennis, driving his 600 kg car, makes a 90 degree turn. His speed before the turn is 15.0 m/s and after the turn are 20 m/s. What is the magnitude of the change in car's momentum?
Q2. An object weighing 333 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 301 N. Immersed in oil; object weighs 313 N. compute the density of the object.
Two bicycle tires are set rolling with the same initial speed of 3.30m/s along a long, straight road, What is the coefficient of rolling friction for the tire under low pressure
What is the total energy of a 15-kg mass attached to a spring oscillating horizontally with an amplitude of 20 cm and an angular frequency of 32 rad/s
an electric toaster operating on 104.6 volts draw a current of 9.1 amps. what is the resistance of the toaster
What is the magnitude of apparent weight of a 83-kg astronaut 3200km from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 3.8 m/s^2.
How much friction must be exerted between the skates and ice.
An electric eel develops a 440V potential difference between its head and tail. What is the energy delivered by this pulse
A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.25 kg to a friend standing in front of him. Calculate for the magnitude of the velocity of the student
the space shuttle is in a 230 mile high orbit. what are the shuttles orbital period in minutes and its speed.
Two point charges -90.0 mC and +40.0 mC, fixed on the x-axis, At what point along x-axis is the electric field zero
Graphically determine the resultant of the following three vector displacements: (a) 34m, 25 degrees north of east ;(b) 48m, 33 degrees east of north; and (c) 22m, 56 degrees west of south.
Children sled down a 45m -long hill inclined at 26?. At the bottom, the slope levels out. how far do the children slide on the level ground?
A clarinetist, setting out for a performance, grabs his 3.37-kg clarinet case (including the clarinet) from the top of the piano, Find the case's vertical acceleration
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