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Problem 1:
A man can row his canoe at a constant rate of 5 miles per hour in still water. He rows upstream for 15 minutes and then rows downstream, returning to his starting point in another 12 minutes. What is the current in miles per hour?
Problem 2:
a). A piggy bank of Nicole contains 40 coins in nickels, dimes and quarters. If there are 6$ in the bank and twice as many dimes as nickels, how many quarters are in the piggy bank?
b). The sume of two numbers is 35 and their product is 15. Find the sume of their reciprocals.
Problem 3:
A rectangular garden is to be twice as long as it is wide and is to be included by a fence. The area, A, of the garden will be a function of the amount of fence used. Which of the following is the correct function for this condition?
A. A = P2/36
B. A = P2/18
C. A = P2/12
D. A = P2/6
Problem 4:
What is the coefficient of the starting, friction if the force require move a mass of 100 kg over a rough surface is around 460 N?
A. 0.35B. 0.47C. 0.52D. 0.59
In an experimental radiation therapy, an equivalent dose of 0.400rem is given to a localized area of tissue with a mass of 0.170kg by 0.800Mev protons. How many protons are absorbed by the tissue
Explain the rule of subtracting two vectors in graphical and component representation, ow the position of an object changes in time in case of linear motion
You are pushing a sled in which your little sister is seated up a 27° slope (one that makes an angle of 27° with the horizontal). With what force do you need to push in order for the sled to move with constant velocity
A hollow cubical box is 0.498 m on an edge. This box is floating in a lake with 1/5 of its height beneath the surface. The walls of the box have a negligible thickness. Water is poured into the box. What is the depth of the water in the box at the in..
A garden hose has an internal diameter of 1.5 cm. It's connected to a sprinkler that consists merely of an enclosure with 14 holes, At what speed does it leave the sprinkler
How much power does a refrigerator use if connected to a 120 volt line and is said to draw as much power as light bulb that uses 1.67 A when connected to the same voltage
A person is standing on the edge of a disk of radius R rotating about its axis. the person walks to a postition of R/4. Is a coeficient of static friction of 0.7 enough to keep the person from slipping when they are at a position of r= R/4.
Starting from rest, a truck travels in a straight line for 7.0 s with a uniform acceleration of +2.0 m/s2. What is the truck's speed at the end of the braking period
An L-R-C series circuit with an inductance of 0.123 H , a resistance of 240 omega , and a capacitance of 7.29 micro F carries an rms current of 0.445. What is the rms voltage of the source
A solid disk of radius 6.30cm and mass 1.15kg , which is rolling at a speed of 1.50m/s , How long will it take for the disk to come to a stop
A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.3. What is the magnification when the convex side is used as a mirror
how many reflections will the light make before exiting this "hall"?
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