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A student sits on a rotating stool holding two 2.0 kg masses. When his arms are extended horizontally, the masses are 1 m from the axis of rotation, and he rotates with an angular speed of 0.75 rad/
A bomber flying horizontally at 120m/s drops a bomb from an elevation of 240m. How far horizontally does the bomb travel before striking the ground?
If the average number of neutrinos detected in apparatus is 2 days, what is the probability of detecting a fluctuation of 8 more a day?
Ignore the specific heat capacity of the chest and determine the final temperature T of the soda and watermelon in degrees Celsius.
What is the distance between the impact points formed on the photographic plate by singly charged ions of 235U and 238U?
Two uniformly charged insulating rods are bent in a semicircular shape with radius r = 11.9 cm. If they are positioned so they form a circle but do not touch and have opposite charges of +8.19 &micr
Find a distance perpendicular to the x-axis and measured from the origin at which the magnitude of the electric field is the same.
What is the capacitance of a pair of circular plates with a radius of 6.0 cm separated by 3.2 mm of mica?
What is the vertical displacement of the drops when they leave the plates? To answer this question, go through the following steps.
A car starts from rest on a curve with a radius of 180 and accelerates at 1.80 . How many revolutions will the car have gone through when the magnitude of its total acceleration is 3.10 ?
The magnitude of the force on q1 due to q2 equals the magnitude of the force on q1 due to the electric field of the parallel plate capacitor. What is the distance r between the two charges?
Assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.1 x 10-6 C/m2. (a) What is the magnitude of the
Standing on a balcony, you throw your keys to a friend standing on the ground below. 1.2 seconds after you release the keys, they have an instantaneous velocity of 16.0 m/s, directed 53° below t
An airplane traveling at v = 180 m/s emits a sound of frequency 5.70 kHz. At what frequency does a stationary listener hear the sound during each of the following times? (Use 344 m/s as the speed of
When one train is at rest in the station and the other is moving nearby, a commuter standing on the station platform hears beats with a frequency of 6.00 Hz when the whistles operate together. If th
(a) What minimum constant acceleration does the aircraft require if the aircraft is to be airborne after a takeoff run of 280 m? (b) How long does it take the aircraft to become airborne?
What is the maximum thickness of ice above this area that the defroster can melt in 4.3 minutes?
Consider a piston-cylinder device that contains nitrogen gas as the system. Initially, the system is at 1 MPa and 427°C. It now undergoes an isobaric process until its temperature is 27°C. D
Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century.
Determine the average value of the translational kinetic energy of the molecules of an ideal gas at (a) 47.6°C and (b) 144°C. What is the translational kinetic energy per mole of an ideal ga
Express the result for the range as a percentage of the actual maximum range of this weapon, which is 30 km for unassisted ammunition.
A whistle of frequency 527 Hz moves in a circle of radius 60.3 cm at an angular speed of 12.3 rad/s. What are (a) the lowest and (b) the highest frequencies heard by a listener a long distance away,
A stone is dropped into a river from a bridge 43.7 m above the water. Another stone is thrown vertically down 1.57 s after the first is dropped. Both stones strike the water at the same time. What i
A bullet is fired vertically upward and reaches a height of 2150m. What is it's initial velocity and how long does it take to reach it's maximum height?
Light has a wavelength of 228.2 nm and a frequency of 7.575 x 1014 Hz when traveling through a certain substance. What is the refraction index of this medium? Use 2.998 x 108 m/s for the speed of ligh