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A small motor boat travels with speed of 3 meters per second relative to the water. A boater directs his boats so that his velocity relative to warer makes a 30 angle with respect to the x axis as shown.The water of the river has a velocity of 0.4m/s in the y direction relative to land. the river is 40 m wide.
1) when the boat reaches the opposite shore, how much is th boat displaced in y from its initial position ?
2) the boater instead directs his 3m/s velocity vector so that the boat arrives at the same y voordinate as it started from. how does the times it takes to cross the river with this heding compare to the previous case ?
a) the crossing time is smaller than before
B) the crossing time is the same as before
C) the crossing time is larger than before
If the standard deviation of the price of meals in San Francisco was $10, determine the largest proportion of meal prices that could be larger than $50.
Based on the data provided, which of these funds has exhibited greater relative variability? Use the proper statistical measure to make your determination.
a. Compute the mean quoted airfare. b. Compute the variance and standard deviation in airfares quoted. Treat the data as a sample.
A small object is on the optical axis, 25.3 cm from a +21.2 cm lens. Find the image distance and magnification by calculation.
If the falcon has a mass of 400 g, and is diving straight downward at 20 m/s when he catches it, how fast is the falcon traveling afterwards, and in what direction?
a. Is it possible for a variance to be negative? Explain. b. What is the smallest value a variance can be? Under what conditions does the variance equal this smallest value?
A small putty ball of mass 2m is thrown horizonatally at a rod of 3m and lenth L which pivots freely about about fixed axis throught one end . The puty ball is thrown with velocity v at the free end of the rod, to which it sticks, what is angular ..
You are to write a 3 page recommendation based on your presentation about what Target should do in regard to international expansion.
Solve the following differential equations where the input is f(t) = 5t and the initial conditions are zero. Plot the response of the following models for 0 ≤ t ≤ 1.5. Obtain the Laplace transform of the following function
Find the focal length of the eye for an object that is 0.65m from the eye. Given the index of refraction for the lens of 1.38 find the radius od the lens for this configuration.
A hot-air balloon is sinking toward the ground at a speed of 3.05 m/s, when the pilot drops a couple of sandbags overboard. How far did the balloon fall during that time
questiona professional race-car driver buys a car which can accelerate at 89.0 ms2. the racer decides to race beside
A force of 83 Newtons is applied to a wire with a diameter of 0.5 mm. What is the tensile stress (in N/m2) in the wire
A uniform rod is attached to a wall by a hinge at its base. Determine the horizontal and vertical components of the force exerted on the rod by the hinge
An organ pipe closed at one end and open at the other end has two successive harmonics with frequencies of 2170 Hertz and 2790 Hertz. What is the fundamental frequency of the pipe
you lay a mirror flat on the floor with one edge against a wall and aim a laser at the mirror. the ray reflects from
An object is placed 107.6 mm to the left of a diverging lens. Where is the image located when the lens has a focal point of 58.8 mm
An acre a unit of land measurement still in wide use has a length of one furlong (1/8mi) and width one-tenth of its length. How many acres are in 3 square miles
A laser beam is traveling through an unknown substance. When it encounters a boundary by air, the angle of reflection is22.0° and the angle of refraction is 41.0°. What is the index of refraction of the substance?
Two negative point charges are separated by 11.0cm and feel a mutual repulsive force of 1.85?N . The charge of one is three times that of the other. How much charge does each have? in nanocoulumbs
a stell ball of mass m suspended by a thread of lenght l. the ball is then released when the thread is horizontal. at the bottom of this path, find the speed of the block just after collision
the moment of inertia of a 4.0m long board pivoted at its center is 25kgm2. find the moment of inertia when it is used
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