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A 17,000-kg airplane lands with a speed of 82 m/s on a stationary aircraft carrier deck that is 115 m long. Find the work done by no conservative forces in stopping the plane.
A bicycle rim has a diameter of 0.65 {\rm m} and a moment of inertia, gauged about its center, of 0.25 {\rm kg}\cdot{\rm m^2}.What is the mass of the rim? Express your answer to two important figures and include the appropriate units.
An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. Determine how much time elapses between an instant when the object's speed is at a maximum and the next instant when its acceleration is at a maxi..
A painter wishes to know whether or not he can safely stand on a ladder. Determine the maximum mass of the painter for which the ladder will remain stable when he climbs a distance d =4.9 meter up the ladder
What is the probability that a test comes back positive-indicating oil and what is the probability that there is oil in teh ground, if the test comes back positive?
he lifting force exerted on an airplane wing varies jointly as the area of the surface and the square of the planes velocity. Determine the lift if the speed is decreased to 80 mph
A basketball player makes a jump shot. The 0.550 kilogram ball is released at a height of 2.10 meter above the floor with a speed of 7.00 m/s. Determine the work done on the ball by air resistance
A block with a coefficient of kinetic friction μk =0.4 slides down a 30 degree inclined plane. Estimate what acceleration does it experience
There is a clever kitchen gadget for drying lettuce leaves after you wash them. Obtain the magnitude of centripetal acceleration at the outer wall
A block is hung by a string from the inside roof of a car. Then the string makes an angle with the vertical. Find what the angle
Two telephone poles are separated by 40 m and connected by a wire. A bird of mass 0.50 kg lands on the wire midway among the poles, causing the wire to sag 2.0 m below horizontal. Assuming the wire has negligible mass, what is the tension in the wire..
A 3690-line/cm grating produces a third-order fringe at 21.4deg angle. What wavelength of light is being used
A system does 136 J of work on its environment and gains 66 J of heat in the process. compute the change in the internal energy of the system
A 5.9-kg rock and a 6.6 × 10-4-kg pebble are held near the surface of the earth. Determine the magnitude of the gravitational force exerted on each by the earth
An airplane flies in a loop (a circular path in a vertical plane) of radius 150m . The pilot's head always points toward the center of the loop, What is the apparent weight of the pilot at this point
Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnit..
two light bulbs one rated 50 w and a second rated 100 w are both supposed to be connected to a 110 v source of emf.
A 15m long rope of m=1.8kg is stretched such that the tension in the rope is 25N. calculate the displacement of a particle in the rope at t=10s, when the wave is at x=0.5m
Two metal rods, one silver and the other gold, are attached to each other. The free end of the silver rod is connected to a steam chamber, with a temperature of 100°C, and the free end of the gold rod to an ice water bath, with a temperature of 0°..
an astronomer is using a telescope to observe two distant stars. the stars are marginally resolved when she looks at
A simple harmonic oscillator takes 12 s to undergo 5 complete vibrations. Find (a) the period of its motion, (b) the frequency in hertz and (c) the angular frequency in radians per second.
Two students on roller skates stand face-to-face, then push each other away. One student has a mass of 99 kg and the second student 68 kg. Find the ratio of the magnitude of the first student's velocity to the magnitude of the second student's veloci..
a coal-fired electric power plant has an overall efficiency of 28 and an output of 1845 megawatts. how many tera joules
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