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A new sidewalk will be 6 ft wide, 220 ft long, and filled to the depth of 3 inches (0.25 foot) with concrete. how many cubic yards of concrete are needed?
During each cycle, a refrigerator ejects 605 kJ of energy to a high-temperature reservoir, and takes in 545 kJ of energy from a low-temperature reservoir. (a) Determine the work done on the refriger
An isolated conductor has net charge +10*10^-6 C and a cavity with a point charge q=+3.0*10^-6 C. What is the charge on (a) the cavity wall and (b) the outer surface?
The distance around a standard tennis court is 228 feet. If the length of the court is 6 feet more than 2 times the width, what are the dimensions of the court?
Two kids are on a merry-go-round. The boy, located 3m from the center of the merry-go-round, is feeling a centripetal acceleration of 2 m/s2. The girl 6m from the center. What is her centripetal acc
A circuit consists of a resistor in series with an inductor and an ac generator that supplies a voltage of 115 V. The inductive reactance is 58.4, and the current in the circuit is 1.03 A. Find the
Around the garden she has a 4 foot wide sidewalk. The area of the sidewalk is 320 feet squared. What are the dimensions of the garden?
The lifts always stop at the lobby floor which is below the first floor. If the hotel had more floors, which would be the lowest floor at which the lift would stop at every day of the week?
A 0.344 kg mass is attached to a spring and undergoes simple harmonic motion with a period of 0.95 s. The total energy of the system is 2.8 J. Find the amplitude of the motion.
Each grab bag will have the same number of items, and all the items in a bag will be the same. How many items can Grace put in each bag?
In a laboratory, a wavelength of a particular hydrogen emission line (Balmer beta line) is observed as 486.1 nm. If the same emission line appears in a star's spectrum at 486.3 nm, what is the stars
If Robby rented 19 movies total with the same number of dramas, twice as many comedies, and twice as many documentaries as Gina, how many movies of each type did Gina rent?
What is the frequency of the car's vibration if its mass (empty) is 1700 kg?
Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is the final velocity of each vehicle?
Enguun earns $17 per hour tutoring student-athletes at Brooklyn University. If Enguun tutored for 12 hours this month, how much money did she earn this month?
An electron moves through a uniform electric field E = (2.80i + 4.50j) V/m and a uniform magnetic field B = 0.386k T. Determine the x- and y-component of the acceleration of the electron when it has
Dustin had five outstanding checks that totaled $117.54. What should his check register balance be if he had an ending balance of $599.43 and outstanding deposits that totaled $235.14?
Dana wants to invest $3,000 at 5% simple interest. How many years will it take for the total amount in her account to reach $4,500?
A golf ball strikes a hard, smooth floor at an angle of ? = 32.4° and, rebounds at the same angle. The mass of the ball is 0.037 kg, and its speed is 45 m/s just before and after striking the fl
Determine his or her actual weight status (underweight, normal, overweight or obese) using the original BMI formula at the top of the instructions.
A capacitor with capacitance C = 4.10·10^-6 F is connected to an AC power source having a peak value of 6.0 V and f = 130 Hz. a) Find the reactance of the capacitor.
The springs of a 1600 kg car compress 4.0 mm when its 62 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations?
A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.28. Its velocity at point A is 8.0 m/s and at point B is 4.8 m/s. Use the impulse-momentum theorem to find
Dan is gliding on his skateboard at 3.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is
Allison has 5 times as many baseball cards as football cards. In all, she has 120 baseball and football cards. How many baseball cards does Allison have?