An electric heater operating at 120. volts draws8.00 amperes of current through its 15.0 ohms of
resistance. The total amount of heat energy
produced by the heater in 60.0 seconds is
(1) 7.20 × 10^3 J (3) 8.64 × 10^4 J
(2) 5.76 × 10^4 J (4) 6.91 × 10^6 J

Answers

Answer 1
Answer:

Ohm's law :

V = IR

The amount of work done is

P = IV or P = I^2R (using Ohm's law to substitute)

Therefore,

P = 64*15

  = 960W

So the total energy released is

Pt = 960*60

    = 57600J

What is ohm's law ?

"Ohm's law states the relationship between electric current and potential difference. It states that the current that flows through most conductors is directly proportional to the voltage applied to it."

The strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit.

What is work done?

Work done : W = (|F| cosθ) |d|

"Work done is defined as the multiplication of magnitude of displacement d and the component of the force that is in the direction of displacement."

Know more about ohms law here

brainly.com/question/12372387

#SPJ2

Answer 2
Answer: Ohms law says that V = IR
The amount of work done is P = IV or P = I^2R (using Ohm's law to substitute)
Therefore P = 64*15 = 960W
So the total energy released is Pt = 960*60 = 57600J

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When all parts of a circuit are composed of conducting materials, the circuit is said to be A. shorted.
B. closed.
C. parallel.
D. open.

Answers

Answer:

The circuit is said to be closed

Explanation:

Electricity is defined as the movement of electrons within a conductor in a certain path.

This means that, for electricity to flow, two conditions need to be fulfilled:

1- there must be conductor materials for electrons to move through

2- a closed path (loop) must exist to allow the flow of electrons

If wither of these conditions is not met, the movement of electrons will be stopped and therefore, electricity will not be conducted

Based on the above, when all parts of a circuit are composed of conducting materials (conductors forming closed path), the circuit is said to be closed (a loop exists for electrons to move in).

Hope this helps :)

    When all arts of a circuit are composed of conducting materials, it is said to be closed, so B.

Suppose nuclear physicists discovered a fission process that always produced two smaller nuclei and only one neutron. Would this eliminate the danger of meltdown in a nuclear power plant? Why or Why not- ? Explain.(Thanks to anyone who helps :)

Answers

Running that process in a power plant would not only eliminate the
danger of a core meltdown, it would also pretty much eliminate the
possibility of getting any nuclear power out of the plant.

The understanding behind your question is correct . . . Neutrons coming
out of one fission go on to get absorbed in other nuclei, and cause the
other ones to fiss.  BUT . . . NOT every free neutron whizzing around in
the core material gets absorbed.  Some of them enter another nucleus
and immediately get spit out.  And some of them never get near another
nucleus at all.  Of all the neutrons produced in one fission, only some
percentage go on to stimulate another one.  So if each fission produced
only one neutron, then the whole process would completely run out of gas
in some amount if time, as the number of free neutrons dwindled and shrank.

The inner solar system contains theA)Jovian planets
B)terrestrial planets and asteroids
C)dwarf planets like Pluto

Answers

jovian planets and  dwarf planets like pluto are in the outer part of our solar system. so, terrestrial planets ,which means earth like planets, live in the inner part of our solar system. or B. is the answer

13. Sound waves can't travel through A. a solid.
B. a liquid.
C. an elastic material.
D. a vacuum.

Answers

They cannot travel through D a vacuum. They need a solid, liquid or gas to travel
D. a vacuum is the correct answer.

Because there are no particles in vacuum to transfer sound waves.

Which part of a scientific argument must be supported by valid data? claim evidence reasoning theory

Answers

This question is a bit ambiguous because all parts of a scientific argument must be supported by valid data. However, among the choices, the closest synonym to "valid data" would be evidence. Evidence is the body of facts or information that support  a given idea.

Answer: Theory

Explanation: A claim is an interpretation based on the results of a given experiment, you first observe, and interpret the information.

Evidence is the valid data itself.

The reasoning is the approach or the "logic path" you used to reach some theory or claim.

The theory is an interpretation of the natural world, that explains why and or how some things work.

If we want to support a theory, we need to have some valid data that supports, at least, part of it, so the right answer here is theory.

Notice that claim also needs to be supported for valid data, but in the case of the claim you first get the data and then make the claim, and in the theory, the work is done in the other order.

A racecar is equipped with a computer that records the reading on its speedometer every second during a race. If you graph this data, what will be the best choice for the dependent variable?

Answers

Since the device is a speedometer, the data it read is the speed of the racecar. Data recording involving time usually uses time as the independent variable. It was also said in the problem that it records the speed every second which shows that the time interval is constant. This means that only other data, the car's speed, is the dependent variable.