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Q. Presume that it takes 7 minutes to fill a 30 gallons gasoline tank. a.) work out the rate at which tank is filled in gallons per second. b.) estimate the rate at which tank is filled in cubic meters per second. c.) find out the time interval, in hours, required to fill a 1 cubic meter volume at the same rate.
Q. A pitcher throws a curveball that reaches the catcher in 0.59 s. The ball curves because it is spinning at an average angular velocity of 380 rev/min on its way to the catcher's mitt. What is the angular displacement of the baseball as it travels from the pitcher to the catcher?
Calculate torques about an axis
If a car traveling at 55 km/h will skid 24 m while its brakes lock, how far will it skid if it is traveling at 130 km/h when its brakes lock.
How much work must this force do to stop the wheel. An electron moving along the x axis has a position given by x = 11te-1t m, where t is in seconds. How far is an electron from the origin when it momentarily stops.
Block 1, of mass m_1 = 0.500 kg, is connected over an ideal (massless and frictionless) pulley to block 2, of mass m_2. Suppose that the blocks accelerate with an acceleration of magnitude a = 0.550 m/s^2 and that coefficient of kinetic friction b..
A car is slides down an icy driveway that slopes at an angle of 20 degrees. What is an acceleration of the car? Assume that the friction between tires and the icy pavement is negligible.
A bullet of mass m = 25 g is fired into a wooden block of mass M = 4.5 kg. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing block to then swing.
What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20 ^circC? Suppose that the air bubble is always in thermal equilibrium with the surrounding water.
A step-up transformer has 300 turns on its primary coil and 90000 turns on its secondary coil if the current flowing through the secondary is 5 amps what is the current flowing in the primary.
What current is in the primary circuit. A proton moves at a speed of 8.0 103 m/s as it passes through a magnetic field of 0.55 T. Find the radius of the circular path. Note down that the charge carried by the proton is equal to that of the electron..
how far is this point horizontally from the end of the ramp. A skateboarder shoots off a ramp with a velocity of 6.2 m/s, directed at an angle of 61° above horizontal. The end of the ramp is 1.5 m above the ground.
A sphere of mass 2.8 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes an angle of 40° with vertical when at rest.
A bucket is made from thin sheet metal. The bottom and top of the bucket have radii of 21.0 cm and 39.0 cm, respectively. The bucket is 30.0 cm high and filled with water. Where is the center of gravity.
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