The electric power P drawn from a generator by a lightbulb of resistance R is P = V2/R, where V is the line voltage. The resistance of bulb B is 87% greater than the resistance of bulb A. What is the ratio PB/PA of the power drawn by bulb B to the power drawn by bulb A if the line voltages are the same?

Q: A rectangular box is h=18 inches in high, w=36.5 cm wide, and L=1.9 yards long. What is the volume…

A:

Q: What does one month's heating cost in the home of a neighbor who uses a heat pump to provide the…

A: Given,Coefficient of performance Heat energy producing rate Cost of electricity  Time We…

Q: The electrical resistance varies directly as the square of the voltage (V) and inversely as the…

A: V=12 V (voltage) P=4 W (power) R=36 ohms (resistance)

Q: The human body uses 7500 kJ of energy every day. What is the rate of energy consumption per second…

A: Given  Enrgy E=7500kJ

Q: The formula for the volume of a cube is V = L³. The side length L of a cube is increased by 19.7%.…

A: The objective of the question is to find out by what percentage the volume of a cube increases when…

Q: What voltage, given in Volts to 1 decimal place, will send a current of 0.2A through an electrical…

A: Given:-  The current of the circuit is I = 0.2 A  The resistance of the circuit has been measured R…

Q: If the solar insolation is 1,400 kWh/m² per year. And the efficiency of solar panel is 17%. How much…

A: We are given solar insolation. We are also given the efficiency of solar panel. We hence first find…

Q: The amount of energy collected by a solar panel depends on the intensity of the sun's rays and the…

A:

Q: n electric heater had a power rating of 1.5 kilowatts if the heater is run for 6 hours and…

A: Given Power of electric power is P=1.5 kW Time is t= 6 h Cost is =$ 0.12 /kWh

Q: A patient’s temperature was 97.0 °F at 8:05 A.M. and 101.0 °F at 12:05 P.M. If the temperature…

A: Temperature was 97.0 °F at 8:05 A.M.  And 101.0 °F at 12:05 P.M. Temperature at 3:35 P.M. = ?

Q: In an experiment, a student obtained the following masses for a product: 0.651 g, 0.643 g, 0.648 g,…

A: Givenm1 =0.651 gm2 =0.643 g m3 =0.648 gm4 =0.609 gm5 =0.646 g

Q: You decide to take your car on a drive through Canada, where gas is sold in liters and distance is…

A: The given values are, η=36.0 mi/gal=36.0 mi/gal1.609 km1 mi=57.924 km/gald=180 km

Q: A watch loses 1 second every week.  How many minutes will the watch be off at the end of 1 year?

A: Given  A watch losses 1 sec every week

Q: A microwave oven has a power requirement of 1,243 W. A frozen dinner requires 5.6 min to heat on…

A: The energy consumed by the oven can be obtained as E=Pt=1243W×1kW1000W5.6min×1h60min=0.116kWh

Q: A common speed limit in Vancouver, British Columbia, is 70 km/hr. You are going 61 MPH. What is…

A: The speed limit in British Columbia is =70km/h.                 The speed in MPH is =61MpH     We…

Q: The gasoline gauge on a van initially read (1)/(8) full. When 15 gallons were added to the tank, the…

A: Let total capacity of the tank is x gallon.Initially the amount of gasoline in the tank = x/8…

Q: A study finds that the metabolic rate of mammals is proportional to m314, where m is the total body…

A:

Q: What is the speed, in miles per hour, of a car that travels at 6.30 m/sm/s ?

A: The speed of a car(v) = 6.3 m/s

Q: ver if connec

A: The voltage delivered by one dry cell,                                                   We need to…

Q: If an electrician works 4-and-3/4 hours a day on a job at $16.00 an hour, how much money does he…

A:

Q: How many minutes are in a week?

A: 1 week = 7 days or 1 week = 7 x 24 hours or 1 week = 7 x 24 x 60 minutes  or 1 week = 10080 minutes

Q: It is estimated that about 40.0 m² of solar panel is needed to provide electricity for an average…

A:

Q: Suppose you use 57 kWh (kilowatt hours) of electricity at $0.35 per kWH, 91 kWh at $0.26 per kWh,…

A: We use 57 kWh of electricity at 0.35$ per kWh So cost of 57 kWh of electricity is 57×0.35$=19.95$ We…

Q: cubic box contains 385 grams of water. What is the length of one side of the box in meters?

A:

Q: A certain wind turbine has a nameplate capacity of 2 MW. If the average capacity factor is 41%, how…

A: Given value--- nameplate capacity of wind turbine = 2 MW. capacity factor = 41 %. We have to…

Q: A European automobile has gas mileage of 14.0 km/L. What is that gas mileage in miles per gallon?

A: Given data : A European automobile has gas mileage of 14.0 km/L   To find : Gas mileage in miles…

Q: The formula for the volume of a cube is y = L³. %3D The side length of a cube is increased by 16.6%.…

A: Concept: Given: Formula for cubes Volume is V=L3 As given in the question the length of the cube is…

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.