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Two boats are initially separated by distance d and head directly toward one another. The skippers of the boats want to arrive at the same time at the point that is halfway between their starting points. Boat 1 moves at a speed v and boat 2 moves at twice the speed of boat 1. Because it moves faster, boat 2 starts at time t later than boat 1. The skippers want to know how much later boat 2 should start than boat 1. Provide them with an equation for t in terms of d and v. (a) t= d/4v (b) t=3d/2v (c) t=3d/4v (d) t= d/2v
What mass (in grams) of steam at 100 C must be mixed with 175 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 50.0 C.
A humanitarian aid package is dropped from a plane flying horizontally 500m above the ground with a speed 100m/s. What is the speed of the package at time of impact? (Calculate the total speed, not a horizontal or vertical projection.)
How various kilograms of nitrogen are boiled away in time of 7.50 h. car that hits a line of water barrels and takes 1.8s to stop.
What is the speed of the bowl? The speed of sound is 340 meters per second.
How long after the car passes point A does the radio experience a minimum in the net signal? suppose that the wavelength has the value found in part.
Vector A has a magnitude of 9.10 units and makes an angle of 54.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods find the following.
For silver electrode (hint: click just below the word "cesium"), what is the highest energy of an electron ejected by light of 250 nm.
A 500 g block slides along a frictionless surface at a speed of 0.35m/s .it runs into a horizontal mass less spring with spring constant 50N/m that extends outward from a wall.
A 2200kg sport utility vehicle travelling at 96 km/h can be stopped in 0.20 s if it hits a concrete wall. Suppose a 60 kg person was in the car that hit this wall. The velocity of the person equals that of the car both before and after the crash a..
A charge of +2q is fixed to one corner of a square, while a charge of -1q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of square, so the potential is zero at each of the two empty c..
A diving board of length 3 is supported at a point 1 from the end, and a diver weighing 480 stands at the free end. The diving board is of uniform cross section and weighs 295.
Draw a free body diagram for the skydiver in the instant after he jumps.(Assume that at this point his velocity is near zero so that air resistance is still negligible.)
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