Khjb ,mnbmnvcvn dsegjhb xfdgrtuhn

Which best summarizes a concept related to the work-energy theorem?

Maurinko [17]

Answer:

When work is positive, the environment does work on an object.

Explanation:

According to the work-energy theorem, the net work done by the forces on a body or an object is equal to the change produced in the kinetic energy of the body or an object.

The concept that summarizes a concept related to the work-energy theorem is that ''When work is positive, the environment does work on an object.''

4 0

3 years ago

Explain the relationship between speed and steepness of the slope of the line on the distance-versus-time graph

balandron [24]

Explanation:

A distance-versus-time graph gives the distance an object has traveled after a given time.

In a distance-versus-time graph the slope represents the the speed of the object because $rise/run$ is

$\frac{\Delta distance }{\Delta time}=speed.$

And how steep the slope of the distance-versus-time graph is tells us how fast an object is moving; steeper the slope greater the speed. For example, a graph with slope 10 represents a greater speed than a graph with slope 2.

So the steepness of the slope of the distance-versus-time is the speed of the object, and greater the slope greater is the speed.

6 0

3 years ago

An electric water heater consumes 2.5 kW for 1.9 h per day.

Alecsey [184]

Answer:

The cost of running the electric water heater for one year is 55.2391 $

Explanation:

The simple rule of 3 helps to quickly solve proportionality problems when you have three known values and one unknown. If two quantities are directly proportional (that is, when multiplying or dividing one of them by a number, the other is multiplied or divided respectively by the same number) the rule of three can be applied as follows:

a ⇒ b

c ⇒ x

So: $x=\frac{c*b}{a}$

where a, b and c are the known values and x is the value you want to find out.

In this case, you can first apply the following rule of three: if 2.5 kW are consumed in 1.9 hours, in 1 hour how many kW are consumed?

$kWh=\frac{1 h*2.5 kW}{1.9 h}$

kWh=1.316

So an electric water heater consumes 1.316 kWh in one day. You apply another simple rule of three: if the heater in 1 day consumes 1.316 kWh, in 365 days (1 year) how many kWh are consumed?

$kWh=\frac{365 days*1.316 kWh}{1 day}$

kWh= 480.34

So an electric water heater consumes 480.34 kWh in a year.

If 1 kWh costs 11.5 cents, 480.34 kWh how many cents does it cost?

$cost=\frac{480.34 kWh*11.5 cents}{1 kWh}$

cost= 5,523.91 cents

Finally, if 100 cents is equal to 1 dollar, 5,523.91 cents, how many dollars are equal?

$cost=\frac{5,5523.91 cents*1 dollar}{100 cents}$

cost= 55.2391 $

<u><em> The cost of running the electric water heater for one year is 55.2391 $</em></u>

5 0

3 years ago

What is the difference between sounds that have the same pitch and loudness? the standing wave the natural frequency the sound q

Elden [556K]

Answer:

Sound quality

Explanation:

Loudness refers to the property of sound that depends on the amplitude of the sound wave while pitch is the property of sound that depends on the frequency of the sound wave.

Now, when sounds have the same pitch and loudness, it means they possess the same natural frequency and also, they will have similar resonance and standing waves. Despite all these similarities, the quality of these sounds will tend to vary from one to another.

5 0

3 years ago

Read 2 more answers

The diagram below shows two electromagnetic waves.

zaharov [31]

The best C) Wave 1 is generated by electric circuits and wave 2 is emitted by radioactive material.

The higher frequency waves will be radioactive material, while the electromagnetic radiation generated by circuits will have a much lower frequency.

3 0

4 years ago