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Sheena can row a boat at 2.97 mi/h in still water. She needs to cross a river that is 1.24 mi wide with a current flowing at 1.67 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream.
(a) What is her speed with respect to the starting point on the bank?
(b) How long does it take her to cross the river?
(c) How far upstream or downstream from her starting point will she reach the opposite bank? (Magnitude and Direction)
(d) In order to go straight across, what angle upstream should she have headed?
What are speed and direction of the ball after the collision
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A near-sighted woman cannot focus on any object farther away than a distance x = 57 cm. Find the focal length of the lens which will correct her vision
Four protons, each with charge +e, are fixed at the corners of a square of side length a, Determine magnitude and direction of the electric field E
The electric potential at a position located a distance of 19.5 mm from a positive point charge of 7.70×10-9C, Calculate the value of the second charge
The shot leaves the hand at a height of 2.110 m and at an angle of 33.60°, and it lands at a horizontal distance of 14.00 m. Illustrate what is the magnitude of the athlete's average force on the shot during the acceleration phase?
What is the magnitude of the force on an electron that is in the region between the plates at a point accurately 2.52 mm from the positive plate
a) Determine the magnitude and direction of the electrostatic force acting on particle A in the figure given below due to particles B and C . The values of the charge on these particles are indicated in the figure.
A piece of string 5.30 m long has a mass of 14 g. What must the tension in the string be to make the wavelength of a 128 Hz wave 120 cm.
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
A ball of mass 1.7 kg hangs at the end of a string 1.2 m in length from the ceiling of a room. The height of the room is 4.0 m. What is the gravitational potential energy of the ball relative to the ceiling
An outboard motor for a boat is cooled by lake water at 14.7 degC and has a compression ratio of 14.1, Calculate efficiency of the engine's Otto Cycle
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