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A third light flashes every 4 minutes. If all three lights flash together at 8p.m., what is the next time of day they will all flash together.
What is the rms current in an RC circuit if R= 5.20 KΩ , C= 1.50 uF, and the rms applied voltage is 120 V at 60.0 Hz. What is the phase angle between voltage and current?
Suppose you are stopped for a traffic light and a ambulance approaches you from behind with a speed of 18 m/s. the given o the ambulance produces sound with a frequency of 955 hz. the speed of sound
An object fired at an angle of 39 degrees above horizontal takes 1.10 s to travel the last 12.5 m of its vertical distance and the last 11.2 m of its horizontal distance. With what velocity was the
The cost to rest a car is $30 per day.Write an expression for the cost of renting a car for d days. Make a table to find how much it will cost to rest a car for 3,5,7,and 10 days.
The charge to rent a car is $29.95 per day plus $.08 per mile. Write an expression that shows the cost of renting a car for d days and m miles.
A Styrofoam cup holding 155 g of hot water at 97°C cools to room temperature, 23.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temper
A vibration platform oscillates up and down with an amplitude of 9.2 cm at a controlled variable frequency. Suppose a small rock of unknown mass is placed on the platform. At what frequency will the
A 30-turn 11.5 cm diameter coil is placed between the pole pieces of an electromagnet. When the magnet is turned on, the flux through the coil changes, inducing an emf.
What is the least number of packs of each he should order to so that each scout will have 1 hat and 1 shirt, and none will be left over?
The circuit is initially uncharged. It is the allowed to charge. It is then left hooked up to the battery for a long time. Then it is allowed to discharge completely. What is the value of the time c
Write an equation that models the amount of water (w) in the tank for any hour (h) that the machines are on. The tank starts full with 150 gallons of water in it.
At the local grocery store, lemons are 52 cents each and limes are 21 cents each. How many lemons and limes can you buy for exactly $3.75?
If the heat pump is reversed so that it acts as an air conditioner in the summer, what would be its coefficient of performance?
Nuala drives to her grandma's. She drives at 20 miles per hour. The journey takes 50 minutes. How long would the journey take if Nuala drove at 40 miles per hour?
An electromagnetic wave strikes a 2.40-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 7.60 10-4 T. How long does it take for the wave to deliver
What is the maximum possible coefficient of performance of a heat pump that brings energy from outdoors at -13.00°C into a 22.0°C house? Note that the work done to run the heat pump is also
Nick has a goal to pay his credit card balance in full by June 30. It is now April, and he can pay all except $200. Evaluate his progress and describe the results.
Why does the amplitude of the vibration of the LRC circuit change with frequency?
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