PHYSICS HIGH SCHOOL

Your oven has a power rating of 5000 watt...Your oven has a power rating of 5000 watts.
a. How many kilowatts is this? b. If the oven
is used for 2 hours to bake cookies, how
many kilowatt-hours (kWh) are used? c. If
your town charges $0.15/kWh, what is the
cost to use the oven to bake the cookies?

Answers

Answer 1
Answer: a). 1,000 watts = 1 kilowatt
5,000 watts = 5 kilowatts

b). (5 kilowatts) x (2 hours) = 10 kilowatt-hours (kWh)

c). (10 kWh) x (15 cents/kWh) = $1.50

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Can someone plz tell me how to solve this step by step

Answers

Answer:

Explanation:

T=2π√l/g

to solve this for l we have to remove the square root in order to finish square root we have to take square on both side so the equation become

T²=4π²l/g

multiplying g on both side

T²g=4π²l

now dividing 4π² on both side

T²g/4π²=l

so l=T²g/4π²

Critical thinking!!Comparing and Contrasting You carry
two heavy bags of groceries upstairs to your
kitchen. Will you do more work on the bags if
you carry them up one at a time? Explain.

Answers

Answer:

no both remains same...

Explanation:

because the work done is given by the product of the both the masses added (m+m) Displacement

and second time when you carry the bags individually it comes out to be the same m×displacement + m×displacement

Which wave top or bottom has the larger frequency

Answers

The question is simple and for the answer to the question above, it must be the bottom one because it has longer wavelengths and Because the bottom ones has 3 crests (wavelengths)
I hope my answer helped you somehow. Have a nice day!

Plugging a lamp into an electrical outlet gives the lamp a source ofa. current.
b. voltage.
c. resistance.
d. all of these

Answers

Plugging a lamp into an electrical outlet gives the lamp a source of voltage. The answer is letter B. The rest of the choices do not answer the question above.

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Answers

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During a thunder storm, movement of water molecules within clouds creates friction which causes the bottom of the clouds to become negatively charged. This means that the bottom of the cloud and the ground begin to act like parallel plates. Once the electric field between the clouds and the ground becomes larger than 3.0 x 10^6 N/C, lightning will strike. a. If the bottom of the cloud is 150 m above the ground, determine the electric potential difference between the ground and the cloud.

Answers

the distance between the charges, or so called infinite charge plates is 150 m, the magnitude of the electric field is 3 x 10^6 N/C and we need to find the voltage, or potential energy, the electric field magnitude is defined as:

E = V/d

therefore, the potential is:

V = E * d

so we have:

V = 3 x 10^6 * 150 = 450 x 10^6 J/C (or volts)

that is the electrical potential difference.
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