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A string of 23 identical christmas tree lights are connected in a series of 120 V source. The string dissipates 73W. What power is dissipated in a single light?
A cubical block of wood 10cm on a side, floats at the interface between oil and water with its lower surface 1.50 cm below the surface a) what is the gauge pressure at the upper surface of the block
A proton is fixed in place. An electron is released from rest and allowed to collide with the proton. Then the roles of the proton and electron are interchanged, and the same experiment is repeated.
Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1×10-7 W/m2. Another student is 4.0 m away from the talkers. What sound intensi
The distance from one hand to the other is 1.5 {rm m}. Biometric measurements indicate that each hand typically makes up about 1.25 % of body weight.
The charge is uniformly distributed within the volume of each sphere. What is the magnitude of the electric field midway between the spheres?
If a person radiates about 65 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 230 Calorie donut?
An elevator and its load have a combined mass of 1400 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant accelerat
Water flowing out of a 16.0 mm-diameter faucet fills a 1.50 L bottle in 7.00 s. At what distance below the faucet has the water stream narrowed to 10 mm diameter?
Determine the fractional decrease in the rod's length using the formula above, where L0,Silver and L0,Gold are the initial lengths of the silver and gold rods. (See Table 12.1 for appropriate consta
In a tennis serve, a 7.8×10-2 kg ball can be accelerated from rest to 36 over a distance of 0.76 m/s. Find the magnitude of the average force exerted by the racket on the ball during the serve.
A 26 kg loudspeaker is suspended 3.0 m below the ceiling by two cables that are each 20 degrees from vertical. What is the tension in the cables?
A hollow aluminum cylinder 20.0 cm deep has an internal capacity of 2.000 L at 20.00C. It is completely filled with turpentine and then warmed to 80.00C. (a) How much turpentine overflows? (b) If i
On a workday the average decibel level of a busy street is 65 kb, with 121 cars passing a given point every minute. If the number of cars is reduced to 33 cars every minute on a weekend, what is th
The acceleration of gravity is 9.8 m/s2. If the object's speed reaches one-half its terminal speed in 7.006 s, determine the terminal speed.
What is your displacement after running 2.5 {rm km} on Strawberry Fields, 1.4 {rm km} on Penny Lane, and 4.2 {rm km} on Abbey Road?
A trapeze artist swings in simple harmonic motion with a period of 4.6 s. The acceleration of gravity is 9.81 m/s2 . Calculate the length of the cables support- ing the trapeze. Answer in units of m
In a movie, tarzan is shown evading his captors by hiding underwater for many minutes while breathing through a long thin reed. assuming the masimum pressure difference lungs can manage and still b
A train is traveling up a 4.8^circ incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction.
The wind exerts a force of 325 N north on a sailboat, while the water exerts a force of 425 N west on the sailboat. Find the magnitude and direction of the net force on the sailboat
When the spring is released, the mass has an initial, positive acceleration of 10.2 m/s2. What was the displacement of the spring, as measured from equilibrium, before the block was released?
A car is driven 165 km west and then 80 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
A ball on a porch rolls 60 cm to the porch's edge, drops 40 cm, continues rolling on the grass, and eventually stops 80 cm from the porch's edge. What is the magnitude of the ball's total displacem
Suppose an ideal gas is in a container 3 L in volume and allowed to expand by having a piston move. The final volume after the piston moves is 15 L. If the gas is originally at a pressure of 1&time
A driver traveling at 44 km/hr in a school zone can brake to an emergency stop in 3 m. What would be the braking distance if the car were traveling at 62 km/hr?