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Q1. A swimmer tries to swim straight across a river. He swims at a speed of 0.600 m/s relative to the water. The river is 24.0 m wide and the boy ends up 70.0 m downstream. How fast is the river flowing?
Q2. Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnitude and direction. Assume the pith balls are equally charged, what is the charge on each ball?
Two sound sources driven in phase by the equal amplifier are d = 4 m apart on the y axis. At a point a very large distance from the y axis, constructive interference is first heard at an angle θ1 = 0.140 rad with the x axis.
What is an actual mechanical advantage of the system
Then, calculate the exact number of protons and express the answer in scientific notation with the correct number of significant digits.
It is found that a uniform amount of electrical flux is going through each region of a Gaussian surface shaped like a cube. What amount of charge is there inside the sphere
Determine the value of the electric potential. calculate the acceleration of the ball when it is 3 cm from the surface and again at the position determined in part b.
What is the maximum tension. The gastrocnemius muscle, in the back of the leg, has two portions, known as the medial and lateral heads. Assume that they attach to Achilles tendon. The cross-sectional area of each of these two muscles is typically f..
A canoe has a velocity of 0.54m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.52m/s east relative to earth.
A parallel plate capacitor has a capacitance of 6.3 µF when filled with a dielectric. evaluate the dielectric constant of the dielectric
At this time it has reached a height of 420 metres above launch pad and attained an upward velocity of 50 ms-1. From this time on, the rocket has constant upward acceleration -10 ms-2 (due to the effect of gravity alone).
Two narrow slits, illuminated by light consisting of two distinct wavelengths, produce two overlapping colored interference patterns on a distant screen. What is the ratio of the two wavelengths
q1. a 2.30-kg object attached to a spring moves without friction b 0 and is driven by an external force given by the
A grandfather's clock is calibrated at a temperature of 20 C. The pendulum is a thin brass rod with a heavy mass attached to the end. On a hot day, when the temperature is 30 C, does the clock run fast or slow? How much time does it gain or lose i..
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