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How much work is done when a force of 490.0 N is exerted while pushing a crate across a level floor for a distance of 1.3 m?
If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? What is the stopping distance when the surface is dry and the c
A loudspeaker at a rock concert generates 10-2 W/m2 at 22 m at a frequency of 1 kHz. Assume that the speaker spreads its energy uniformly in all directions. What is the intensity level at 22 m in dB
If you weigh 675 N on the earth, what would you weigh on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0 ?
The ends of a massless rope are tied to a ceiling. Two identical 2.55 kg masses are now hung along the length of the rope, dividing the rope into three segments of equal length.
Explain in detail why the dust clings to the wheels and be sure to describe forces by name and mention charging by induction and conducting or rubbing if it is appropriate, also explain what atoms o
A child slides down a slide with a 34o incline, and at the bottom her speed is precisely half what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic frictio
Assuming a constant upward slope of 32, calculate the horizontal and vertical components of the acceleration of a truck that slowed from 140 to rest in 7.3.
An electric water heater holds 165L. If electricity costs 0.18 per , how much does it cost to raise the water temperature from 10 to 60?
How many time constants must elapse for an initially uncharged capacitor in an RC series circuit to be charged to 94.0% of its equilibrium charge?
A space station in the form of a large wheel, 72.1 m in diameter, rotates to provide an "artificial gravity" of 6.5 m/s2 for people located at the outer rim. What is the frequency of the rotational
A loudspeaker of mass 21.0 {rm kg} is suspended a distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.90 {rm m}.
The four tires of an automobile are inflated to a gauge pressure of 200 kPa. Each tire has an area of 0.024 0 m2 in contact with the ground. Determine the weight of the automobile.
A proton with speed v = 3.00 x 105 m/s orbits just outside a charged sphere of radius r = 1.00 cm. What is the charge on the sphere?
One more bulb is added to the circuit and the location of the switch is changed. The new circuit is shown in the figure. (Part B figure) Bulbs A, B, C, and D are identical and the switch is an ideal
If the initial temperature of the horseshoe is 450° C, and the initial temperature of the water is 45° C, what is the equilibrium temperature of the system? Assume no heat is exchanged with
A negative charge of -2.0 10-4 C and a positive charge of 9.0 10-4 C are separated by 0.26 m. What is the force between the two charges?
If 20 grams of hot water at 80°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? How much ice must melt in order t
(a) Draw a freebody diagram for the ladder. (b) Find the normal force exerted by the bottom ladder. (c) Find the tension in the rope when the monkey is two-thirds of the way up the ladder.
A jar of salsa sits on a wheel that is turning at 24 rpm (revolutions per minute). If the jar sits 40 cm from the center of the wheel, what is the acceleration of the jar?
A beam of parallel rays from a 31 MHz citizen's band radio transmitter passes between two electrically conducting (hence opaque to radio waves) buildings located 47 m apart. What is the angular wid
charges of 2.0 uc, -1.0 uc, and -1.0 uc are located at three corners of a square which is 1.0 m on a side. find the magnitude and direction of the electrical force on the 2.0 uc charge.
When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.21 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 25.0o from the
When people sleep, their metabolic rate is about 2.6 10-4 C/(s · kg). How many Calories does a 83 kg person metabolize while getting a good night's sleep of 9.0 hours?
How long does it take a plane, traveling at a constant speed of 266 m/s, to fly once around a circle whose radius is 2250 m.