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A surfer is riding a wave. Suppose she starts at the top of the wave with a speed of 1.87 m/s and moves down the wave until her speed reaches 13.0 m/s. The drop in her vertical height is 1.89 m. If her mass is 72.5 kg, how much work is done by the (non-conservative) force of the wave?
Point charges of 30.0 µC and 50.0 µC are placed 0.500 m apart. What is the magnitude and direction of the electric field halfway between them
It takes sound waves of frequency 500 Hz 14.7 ms to make a round trip through a hollow pipe of length 7.5 m filled with helium. What is the speed of sound in helium
1400 kg car acelerates from 45mph (20.1 m/s) to 65mph (29.1m/s) over a distance of 440 m in 35 s. what is the network done on the car by all forces acting on it
An apple is placed 13.6 cm in front of a diverging lens with a focal length of magnitude 22.4 cm. What is the magnification of the image of the apple
Fortunately our environment radiates too. The human body absorbs this radiation with an absorbance of 97.0 percent, How much energy does our body lose in one second
You are given 65.000 cm of copper wire with diameter 7.0000 mm. compute At what rate is thermal energy generated in the loop
guess the force between a proton and an electron at the Bohr radius of 0.5Å (1 Å=10-10 m). The magnitude of the charge of an electron, as well as a proton, is 1.6·10-19 C.
A current of 0.300 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heart beat, how many conduction electrons pass through your heart
Two particles with equal mass have charges of 1.0 microCoulombs and 3.0 nanoCoulombs respectively. What must be their mass if their mutual gravitational attraction is to equal their Coulomb repulsion?
A 5.00 g charged insulating ball hangs on a 27.0 cm long string in a uniform horizontal electric field. Given the charge on the ball is 2.00 ?C , find the strength of the field. The angle that the string makes with the vertical is 8.00° N/C.
A car of mass 920.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 41.0 km/hr (11.4 m/s), Calculate the acceleration of the car at that time
An induction cooktop generates an alternating magnetic field B(t)=(0.25 T)cos??t. Calculate the maximum emf induced in a pan modeled as a ring of radius 10 cm
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