A 30.0 W lightbulb is 19.0 percent efficient. This means that 19.0percent of the electric energy is converted to light energy.

(a) How many joules does the lightbulb convert into light eachminute it is in operation?

(b) How many joules of thermal energy does the lightbulb produceeach minute?

I don't know how to start this problem!

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a. How much power does the set use?

b. If the set is operated for an averageof14 h/day, What energy in KWh does it consume per month(30days)?

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Thanks in advance

One lightbulb is marked "29 W 120 V," and another "118 W 120 V";this means that each converts its respective power when pluggedinto a constant 120 V potential difference.

a) find the resistance of each bulb

R₂₉ = ? Î©

R₁₁₈ = ? Î©

b) how long (s) does it take for 1.00C to pass throughthe dim bulb?

How is this charge different upon its exit from, versus itsentry into, the bulb?
When the charge emerges from the bulb, it has a) lower potentialenergy b) no change in potential energy or c) higher potentialenergy

c)How long (s) does it take for 1.00 J to pass throughthe dim bulb?

How is this energy different upon its exit from, versus itsentry into, the bulb?
Electric potential energy is a) transformed into heat and light b)transformed into heat only c) transformed into light only

d) Find the cost of running the dim bulb continuouslyfor 28.0 daysif the electric company sells its product at $0.0700 perkWh.

What physical quantity does the electric companysell?
The electric company sells a) energy b) charge c) reactance d)power

what is its price for one SI unit of this quantity?

? $/Joule

The rocket’s 60 W motor is plugged into a 100 V outlet for 4 minutes.

a)How much current does the motor require?

b)What is the resistance of the motor?

c)How many electrons pass through the motor?

d)What amount of energy (in Joules) does the motor require?

e)What amount of energy (in kWh) does the motor require?

f)If electricity costs $0.13/kWh, how much will it cost to run the motor for 30 minutes?