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A second mass is attached at another mark to keep it horizontal and in rotational and translational equilibrium. If the tension in the string attached to the ceiling is 22.2 N, find the value of the
A gas is compressed at a constant pressure of 0.800 atm from 10.00 L to 3.00 L. In the process, 370 J of energy leaves the gas by heat. What is the work done on the gas?
A 50.0 kg beam of length 17.0 m is being supported by two struts. How far from the base is the left srut located?
A 38-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 185 J from 425 J. How high does she rise during t
An object with mass 1.0 kg is executing simple harmonic motion, attached to a spring with spring constant k =195 N/m. When the object is 0.21 m from its equilibrium position, it is moving with a sp
The ladder makes a 50.0° angle with the ground. How far up the ladder can an 880 N person climb before the ladder begins to slip?
A small 150.g pebble is 9.00km deep in the ocean and is falling with a constant speed of 25m/s. What force does the water exert on the falling pebble?
A 14.0 m long conveyor belt, inclined at 27.0°, is used to transport bundles of newspapers from the mail room up to the cargo bay to be loaded on delivery trucks. Each newspaper has a mass of 1
From the top of a cliff, a person uses a slingshot to fire a pebble straight downward, which is the negative direction. The initial speed of the pebble is 9.4 m/s. (a) What is the acceleration (magn
How would the photographer use the polarizing filter to find out the direction of polarization of the light coming from the blue sky? Her only reference is the polarization axis of the filter.
An 81 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 76 cm. What is the speed of the arrow as it leaves the bow?
Iron has a density of 7.87 g/cm3 and the mass of an iron atom is 2.40 x 10-26 Kg. If the atoms are spherical and tightly packed, what is the volume of an iron atom? (Your answer must have correct si
If his downward motion is stopped 3.00 s after he enters the water, what average upward force did the water exert on him?
A plane water wave with a wavelength of 15.4 cm passes through two openings that are 5.00 cm apart. At what horizontal distance from the central maxima will the 1st maxima be found?
The coefficient of static friction between his hands and the book is 0.40. to keep the book from falling, what is the magnitude of the minimum pressing force that each hand must exert?
A car crashes into a wall at 25 m/s and is brought to rest in 0.1 s. Calculate the average force exerted on a 80 kg test dummy by the seat belt.
A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 532 and has a speed of 25.5 . The motorcycle has a speed of 12.5. What frequency does the
In other words, all readings will be off by exactly that non-zero reading. Will this affect the accuracy of measuring Rx? Explain. Is there a means of still getting an accurate measurement?
The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by
The rope is inclined at 20.4° above the horizontal, and the sledge moves a distance of 19.5 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.50
In an earthquake, it is noted that a footbridge oscillated up and down in a one loop (fundamental standing wave) pattern once every 2.8 s. What other possible resonant periods of motion are there fo
A spring with a spring constant of 1.8 × 102 N/m is attached to a 1.8 kg mass and then set in motion. What is the period of the mass-spring system?
Next, you start a backetball rolling with the same initial speed. it keeps rolling form one end of the gym to the other. why does the basketball roll so far? Does friction significanlty affect its m
An old moped drives by a small motor turning a small rubber wheel which is in contact with the rear tire. If the small wheel has a 3 cm radius and accelerates at 805 rad/s, how long does it take fo
a superhero flies 235 m from the top of a tall building at an angle of 20 degrees below the horizontal. what is the horizontal component of the superhero's displacement.