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If sally can paint a house in 4 hours, and john can paint the same house in 6 hours, how long will it take both of them to paint the house together?
A wheel 33cm in diameter accelerates uniformly from 240 rpm to 360 rpm in 6.5s. How far will a point on the edge of the wheel have traveled in this time?
1 man takes 60 hours to clean city streets, they hire an addition man to help and it takes them 15 hours to clean the city streets, how long would it take the second man to clean the streets by hi
A square wire 2.0 cm on each side is oriented so that 5.00 mT magnetic field makes a 30 degree angle with the normal to the plane of the square. if a 1.0 mA current causes a 25 N x m torque on the w
One account earned a simple interest rate of 6.4% and the other earned a simple interest rate of 3.7%. The two accounts earned a total of $788. How much was invested in each account?
How much additional money should they invest at an annual simple interest rate of 4.0% so that the total annual interest earned from the two accounts is 6.2% of the total investmant?
A proton is fired at 7E6 m/s directly towards a stationary 2E-6 C point charge that cannot move and is initially 2 meters away from the proton. What is the smallest distance that ever separates the
Suppose you deposit $ 2,000 for 5 years at a rate of 8%. Calculate the return (A) if the bank compounds anually (n=1) Round your answer to the nearest cent.
A heat engine utilizes a heat source at 580 degrees Celsius and has an ideal (Carnot) efficiency of 28%, to increase the ideal efficiency to 34%, what must be the temperature of the heat source?
A family is canoeing downstream (with the current). Their speed relative to the banks of the river averages 2.75 mi/h. Write an equation for the rate of the canoe downstream.
A skier of mass 70kg is pulled up a slope by a motor driven cable. How much work is required to pull him 60m up a 30 degrees slope, assuming its frictionless, at a constant speed of 2.0m/s?
The seling price of a washing machine is $345.00 if the markup is 15% of the dealer's price, what is the dealer's cost of the washing machine?
How fast can you set the Earth moving? In particular, when you jump straight up as high as you can, what is the maximum recoil speed that you give to the Earth? Let your mass be81.0kg and your maxim
Roni's truck rental charges $38.00 a day plus 13 cent per mile. for how many miles will the cost of renting a truck for one day at ace equal the cost at roni's?
A solid ball encounters a 0.760 m vertical rise on the way back to the ball rack. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. The translational speed of t
Write the equation of the line through (0, 32) and (10, 60) to model the growth of direct deposit. Use the equation from part (a) to predict the year in which 100% of all workers will receive direct d
The frequency of a light wave is the same when the light travels in two different media. Assuming that the refraction indices of the two media are 1.628 and 1.862, respectively, find the ratio of th
In a five year certificate of deposit with and interest rate of 4.5%. Calculate how much interest you would earn with each option over five years time with continuous compounding.
A 1.03 10-3 µF capacitor has an initial charge of 0.100 C. When a resistor is connected across the capacitor plates, there is an initial current through the resistor of 1.08 A. What is the cur
Arthur reads everyday. On weekdays he reads at least 30 minutes a day. On the weekends, he reads twice as long. About how long does he read each week?
An electron moves through a uniform electric field E = (2.31i + 5.06j) V/m and a uniform magnetic field B = 0.381k T. Determine the x- and y-component of the acceleration of the electron when it has
You are designing a motor cycle. To provide a smooth ride, you want the bike to loose energy it acquires from driving through pot holes as quickly as possible. To this end, you choose shock absorber
Maya has deposited $600 in an account that pays 5.64% interest, compounded continuously. How long will it take for her money to double?
A 90% antifreeze solution is to be mixed with a 75% solution to make 30 liters of an 80% solution. How many liters from each solution should be used?
The magnetic field produced by the solenoid in a magnetic resonance imaging (MRI) system designed for measurements on whole human bodies has a field strength of 5.04 T, and the current in the soleno