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A child, who is L = 54m from the bank of a river, is being carried helplessly downstream by the river's swift current of 1.0 m/s. As the child passes a lifeguard on the river's bank, the lifeguard starts swimming in a straight line until she reaches the child at a point downstream.
1) If the lifeguard can swim at a speed of 2.0 m/s relative to the water, how long does it take her to reach the child?
2) How far downstream does the lifeguard intercept the child?
The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. If water at the top of the falls is at 14.9°C, what is the maximum temperature of the water at the bottom of the fal..
When the door of the Chapel of the Mausoleum in Hamilton, Scotland, is slammed shut, If that echo were due to a single reflection off a wall opposite the door, how far from the door would that wall be
a 1200 kg car moving at 15.6 ms collides with a stationary car of mass 1500 kg if the two vehicles lock together what
Find the electric field (in N/C) at the position of the electron.
Water in a pipe runs down a 20 m high hill. If the speed of the water on the top of the hill is 5.0 m/s and its pressure is 150 kPa, what is the pressure of the water at the bottom of the hill
10 Volts is applied to a resistor. 2 amps flow through the resistor. Determine what is the resistors value
A rotating wheel requires 3.03 sots rotate through 37.0 revolutions. Its angular speed at the end of the 3.03 s interval is 98.6 rad/s. What is the constant angular acceleration of the wheel?
shallow glass dish whose width w is 4.40 cm. When an observer's eye is placed as shown, the observer sees the edge of the bottom of the empty dish, Find the height h of the dish
At a certain location, the Earth's magnetic field has a magnitude of 5.8×10?5T, Find the magnitude of the magnetic flux through the top of a desk at this location that measures 140cm by 90
A step-down transformer (turns ratio = 1:8) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train, What is the current in the primary coil?
An electron moves at a speed of 150 m/s perpendicular to the direction of a uniform magnetic field of 0.5 T. What is the radius of the electron's circular orbit in units of nanometers (1 m = 109 nm)
The distance between Earth and its moon is 3.84 x 10^8 meters. Earth's mass is m= 5.9742 X 10^24 kg and the mass of the moon is 7.36 x 10^22 kg. What is the force between Earth and the moon?
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