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A driver sets out on a journey. For the first half of the distance she drives at the leisurely pace of 30 mi/h; she drives the second half at 60 mi/h. What is her average speed on this trip?
A 0.305-kg mass is attached to a spring with a force constant of 13.0 N/m. If the mass is displaced 0.252 m from equilibrium and released, what is its speed when it is 0.110 m from equilibrium?
Express the distance between the plane and the radar station as a function of d.
Question: Jason leaves Detroit at 2:00 P.M. and drives at a constant speed west along I-96. He passes Ann Arbor, 40 mi from Detroit, at 2:50 P.M. (a) Express the distance traveled in terms of the ti
The bullet remains in the block, and after impact the block lands 2.00 m from the bottom of the table. Determine the initial speed of the bullet?
The springs of a 495 kg motorcycle have an effective force constant of 9130 N/m. By what percent and in what direction does the period of oscillation change when a 111kg person rides the motorcycle?
A current of 0.77 A flows through a copper wire 0.47 mm in diameter when it is connected to a potential difference of 15 V. How long is the wire?
A long solenoid that has 910 turns uniformly distributed over a length of 0.390 m produces a magnetic field of magnitude 1.00 * 10-4 T at its center. What current is required in the windings for that
The battery is removed and the capacitor is reconnected to another capacitor C2 = 8μF. What are the final charges and potential differences for the capacitors?
At what rate does the jet airplane radiate energy in the form of sound waves? Assume that the sound wave radiates from the airplane equally in all directions.
White light, with frequencies ranging from 4.00 x 10^14Hz to 7.90x10^14HZ is incident on a potassium surface. The work function of potassium is 2.24 eV. Find the maximum kinetic energy of electron
The maximum charge on the capacitor is 45mC during oscillations. What is the maximum current through the inductor during the oscillations?
An uncharged 1.0-μF capacitor is connected in series with a 23-kΩ resistor, an ideal 7.0-V battery, and an open switch. What is the voltage across the capacitor 11ms after closing the swi
The CCl4 formed in the first step is used as a reactant in the second step. If 2.50 mol of CH4 reacts, what is the total amount of HCl produced? Assume that Cl2 and HF are present in excess.
A bar of length 2 cm slides along metal rails at a speed of 1 cm/s. The bar and rails are in a magnectic field of 2 T, pointing out of the page. what is the induced emf in the bar and rails?
The sun is shining and a spherical snowball of volume 390 ft3 is melting at a rate of 15 cubic feet per hour. As it melts, it remains spherical. At what rate is the radius changing after 3.5 hours?
What is the maximum time resolution for human hearing that allows sounds coming from the left to be distinguished from sounds coming from the right?
A massive object of m=5kg oscillates with simple harmonic motion. At which time after t=0 is the kinetic energy first at a maximum?
Sound travels at a speed of V=1539 m/s in water. While underwater a student hears a v= 3.5 kHz whale song. What is the wavelength in meters of the whale song?
The low E string has a linear density of p = 0.08 kg/m and when tuned properly should produce a tone of v = 82.41 Hz. What is the proper tension the string should be under in N?
To maintain this constant linear speed, the angular speed of the driving spool (the take-up spool) has to change accordingly. The angular speed of the take-up spool when it is empty, with radius r1 =
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s2. Through what angle has the wheel turned when its angular speed reaches 72.0 rad/s?
A boy throws a ball upward from the top of a tower with a speed of 12m/s. On the way down it just misses the thrower and falls to the ground 50m below. Find how long the ball remains in the air.
An insulated wire of diameter 1.0mm and negligible resistance is wrapped tighly around a cylindrical core of radius 5.0cm and length 30cm to build a solenoid.
A ball is dropped from the top of a building. After 2 seconds, its velocity is measured to be 19.6 m/s. Calculate the acceleration for the dropped ball.