All categories

4 years ago

Which feature of a heating curve indicates a change of state?

Physics

2 answers:

Andreas93 [3]4 years ago

7 0

A "heating curve" is a graph that shows the temperature of the substance
against the amount of heat you put into it.

For most of the graph, as you'd expect, the temperature goes up as you
add heat, and it goes down as you take heat away. BUT ... While the
substance is changing state, its temperature doesn't change even though
you're putting heat in or taking heat out.

So that part of the graph is a horizontal line.

BaLLatris [955]4 years ago

5 0

Answer: rizontal

Explanation:

You might be interested in

What is the si unit of power?

grandymaker [24]

The SI unit of power is the watt<span>, which is equal to one </span>joule/<span>per second.

So I would say Watt is the answer. Hope it helped. :)

</span>

6 0

4 years ago

Read 2 more answers

A motor does 20. joules of work on a block, accelerating the block vertically upward. Neglecting friction, if the gravitational

Eva8 [605]

The motor does 20 J of work on the block, it means that the total mechanical energy of the block has increased by 20 J. But the increase in total mechanical energy is equal to the sum of the increases in potential energy and kinetic energy:
$\Delta E = \Delta U + \Delta K$
So, if the gravitational potential energy has increased by 15 J, the kinetic energy has increased by
$\Delta K = \Delta E - \Delta U = 20 J - 15 J= 5 J$

4 0

3 years ago

How would I calculate the X from a known velocity when launching a ball off a table?

Anon25 [30]

Here are the steps you would need to follow:

#1). Define what 'the 'X is, and how it's related to the ball.
#2). Be clear on how 'the X' is related to the 'known velocity'.
#3). Identify how the 'known velocity' is related to the action of the ball when it's launched.

With this information in front of you, you'll have a much better chance
of answering the question.

With none of it in front of me, I have no chance at all.

4 0

3 years ago

Read 2 more answers

Changes in motion come from;

almond37 [142]

Answer:

C-Mass

Explanation:

3 0

3 years ago

A square loop of length 0.1 m on each side is sitting in a magnetic field that is increasing at a rate of 0.1 T/second. What can

Zolol [24]

Answer:

The induced emf can be found by Faraday’s Law.

$\epsilon = -\frac{d\Phi_B}{dt}$

$\Phi_B = BA = B(0.1)^2 = 0.01B$

The magnetic field is increasing at a rate of 0.1T/s. So,

$\frac{dB}{dt} = 0.1$

Finally,

$\epsilon = \frac{dBA}{dt} = 0.01\frac{dB}{dt} = 0.01\times 0.1 = 0.001 V$

Explanation:

Faraday’s Law states that a change in the magnetic flux induces an emf in the circuit. The magnetic flux is the multiplication of magnetic field and the area of the loop. The area of the loop is simple, and the change of magnetic field as a function of time is given in the question.

The minus sign in front of the Faraday’s Law means that the induced current always opposes the change of the magnetic flux. Since we do not know the direction of the magnetic field in this question, we cannot find the direction of the induced emf on the loop.

4 0

3 years ago