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1. You are in a kayak which can move at a velocity of 2.6 m/s when in still water. You are attempting to cross a river which is 110 across and which is flowing to the East at a speed of 0.4 m/s. You head directly North across the river.
a. How long does it take you to get to the other side?
b. How far downriver are you when you reach the other side of the river?
c. If you now head back upriver, how long does it take you to reach a point on the river opposite from where you started?
2. You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 30 m/s towards the wall at an angle of 30 degrees. Ignore any affects due to air resistance.
a. How long is the ball in the air before it hits the wall?
b. How high above the launch point does the ball hit the wall?
if an acoustic wave from an echo sounder on a ship take .30 seconds to reach the sea-floor and reflected wave returns to the boat in .30seconds how deep is the water.
Car has the mass M = 1100kg at 60.0 km/hour. What is the radius of the turn if theta = 20.0 degrees
On a banked race track, the smallest circular path on which cars can move has a radius of 120 m, while the largest has a radius 155 m, Find the smallest speed at which cars can move on this track without relying on friction
Three point charges -q,-q, and 2q occupy the verices of an equilateral triangleof side a. Find the electric field at the center of the triangle
A neutron star has a mass of 2.20 × 10^30 kg (about the mass of our sun) and a radius of 5.20 × 10^3 m. Assume an object falls from rest near the surface of such a star. How fast would it be moving after it had fallen a distance of 0.0083 m.
A solid weighs 300N. Calculate the pressure exerted by the solid when it is kept on a glass surface, if the area of contact is 700cm2 . solve the numerical.
You use a sequence of ideal polarizing filters, each with its axis making the same angle with the axis of the previous filter, What is the angle between adjacent polarizers
The bacterium Escherichia Coli (E. coli) is a single celled organism that lives in the gut of healthy humans and animals, For the segment BC in the bacteriums trajectory, calculate the x and y components of its displacement
An insulating rod of length 14.0 cm is bent into the shape of a semicircle and has a uniform total charge of -7.5 uC, Calculate the magnitude and direction of the electric field at the center of the semicircle arc
If a 62.6 kg runner dissipates a power of 60.9 W during a race, explain how fast is the person running? Assume a running step is 1.50m in length
A 24.5 kg child is standing on the outer edge of a merry-go-round which has moment of inertia 989 kg*m2 and radius 2.40m. Find the angular velocity if the child moves to a final position
Calculate the amount Stansfield should report as net cash provided (used) by financing activities in its 2010 statement of cash flows. (Enter amount as positive.)
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