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a new car is tested on a 300 m diameter track. If the car speeds up at a steady 1.2 m/s^2, how long after starting is the magnitude of its centripetal acceleration equal to the tangential accelerat
A 0.144 kg baseball is pitched horizontally at 34.0 m/s. After it is hit by the bat, it moves at the same speed, but in the opposite direction. What was the change in momentum of the ball?
A pair of narrow, parallel slits separated by 0.1 mm are illuminated by the green component from a mercury vapor lamp (ë=546.1 nm). The interference pattern is observed on a screen 4 m from th
A 251 kg wooden raft floats on a lake. When a 70 kg man stands on the raft, it sinks 4.0 cm deeper into the water. When he steps off, the raft vibrates for a while. What is the frequency of the vibr
What is the magnitude of the lift force? Determine the magnitude of the air resistance R that opposes the motion.
What is the distance Deltay between the two points that you observe? Assume that the plates have length d, and use e and m for the charge and the mass of the electrons, respectively.
What is the magnitude of the frictional force. If the player comes to rest after 1.2 seconds, what is his initial speed?
A broad beam of light of 630 nm is normally incident on a thin, wedge-shaped film with an index of refraction 1.50. Light transmitted through the film gives 10 bright and 9 dark bands along the fil
In New England, the horizontal component of the Earth's magnetic field has a magnitude of 1.6 x 10-5 T. An electron is shot vertically straight up from the ground with a speed of 2.8 x 106 m/s. Wha
How can companies offering "free" products (e.g., Linux, Netscape) make money from these products? How can other companies compete with these fast-rising standard products?
What is the centripetal acceleration of a point on the perimeter of a bicycle wheel of diameter 70.0 cm when the bike is moving 8.00 m/s?
The source of an intense 780. Hz whistle sound is 800. meters away. If the sound travels at 341. m/s, how many wavelengths are between you and the source?
How old is the mummy? Determine its age in years assuming that in living trees the ratio of 14C/12C atoms is 1.23E-12.
On a very muddy football field, a 120 linebacker tackles an 85 halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.7 north and the halfback is sliding with a
How far behind the concave lens should the film be placed? What is the linear magnification of this lens combination?
Draw arrows showing the ball's momentum before and after it hits the bat. What was the impulse delivered by the bat?
A car of mass = 1200 traveling at 65.0 enters a banked turn covered with ice. The road is banked at an angle , and there is no friction between the road and the car's tires. What is the radius of t
A trombone has an effective length of 190 cm and the speed of sound in air is 340 m/s. Notes are selected by moving a U-shaped tube in or out to change the effective length of the trombone. What sho
The vertical or y component of its acceleration is 1300 m/s2. The ball's mass is 0.42 kg. What is the magnitude of the net force acting on the soccer ball at this instant?
A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60 T magnetic field. What is the radius of the resulting path?
A piston, A, as shown below, has a diameter of 0.61 cm. A second piston, B has a diameter of 3.7 cm. Determine the force, F, necessary to support the 500.0 N weight in the absence of friction.
Those two waves are sent along the same cord simultaneously, what is the total average rate at which they transport energy when their phase difference is (c) 0, (d) 0.6π rad, and (e)π rad?
A sound source of 500 Hz with an acoustic power of 1/10 of a watt how do you find the intensity 1/2 a m from the source, the pressure amplitude, and the magnitude of the specific acoustic impedance
Thermos flask containing 110 cm3 of water at 20.0°C. By how much has the entropy of the cube-water system changed when a final equilibrium state is reached?
Light of wavelength 470 nm in air enters a fishbowl filled with water, then exits through the crown glass wall of the container. Find the wavelengths of the light (a) in the water and (b) in the gl