1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harlamova29_29 [7]
2 years ago
11

What is the change in internal energy (in J) of a system that releases 675 J of thermal energy to its surroundings and has 525 c

al of work done on it
Physics
1 answer:
Savatey [412]2 years ago
6 0

Answer:

1519.5 joules

Explanation:

What is the change in internal energy (in J) of a system that releases 675 J of thermal energy to its surroundings and has 525 cal of work done on it

first, convert cal to joules

1 cal =4.18 joules

so 525 cal = 525 X 4.18 = 2194.5 joules

the system spent 675 joules heating the surroundings and was given

2194.5 joules by work done on it

so the net gain in energy is

2194.5 -675 = 1519.5 joules

You might be interested in
The emf induced in a coil that is rotating in a magnetic field will be at a maximum at which moment?
adelina 88 [10]
TLDR: It will reach a maximum when the angle between the area vector and the magnetic field vector are perpendicular to one another.

This is an example that requires you to investigate the properties that occur in electric generators; for example, hydroelectric dams produce electricity by forcing a coil to rotate in the presence of a magnetic field, generating a current.

To solve this, we need to understand the principles of electromotive forces and Lenz’ Law; changing the magnetic field conditions around anything with this potential causes an induced current in the wire that resists this change. This principle is known as Lenz’ Law, and can be described using equations that are specific to certain situations. For this, we need the two that are useful here:

e = -N•dI/dt; dI = ABcos(theta)

where “e” describes the electromotive force, “N” describes the number of loops in the coil, “dI” describes the change in magnetic flux, “dt” describes the change in time, “A” describes the area vector of the coil (this points perpendicular to the loops, intersecting it in open space), “B” describes the magnetic field vector, and theta describes the angle between the area and mag vectors.

Because the number of loops remains constant and the speed of the coils rotation isn’t up for us to decide, the only thing that can increase or decrease the emf is the change in magnetic flux, represented by ABcos(theta). The magnetic field and the size of the loop are also constant, so all we can control is the angle between the two. To generate the largest emf, we need cos(theta) to be as large as possible. To do this, we can search a graph of cos(theta) for the highest point. This occurs when theta equals 90 degrees, or a right angle. Therefore, the electromotive potential will reach a maximum when the angle between the area vector and the magnetic field vector are perpendicular to one another.

Hope this helps!
6 0
3 years ago
Calculate the amount of heat (kcal) released when 50.0g of steam at 100*c hits the skin, condenses, and cools to a body temperat
luda_lava [24]
As the steam touches the skin, it undergoes a phase change and releases latent heat due to the phase change. As it reaches equilibrium, it releases sensible heat. We calculate as follows:

Q = latent heat + sensible Heat
Q = 2.26 kJ / g (50.0 g) + 50.0 g ( 4.18 J / g C) (37 C - 100 C) ( 1 kJ / 1000 J)
Q = 99.833 kJ
6 0
3 years ago
Read 2 more answers
What is the work-energy theorem equation?
grin007 [14]

Answer:

W = Fd = KE =1/2mv²

Explanation:

not sure if that's what your looking for but i'm pretty sure this is it.

7 0
2 years ago
Read 2 more answers
Give three examples of how gravity is at work in our solar system.
musickatia [10]
Well.....
Gravity from the sun pulls the planets torward it while inertia pulls it outward....but I guess that would be why it orbits sorry if this doesn't help but uh
6 0
2 years ago
Read 2 more answers
A hot ball of gas in outer space that creates its own energy is called a _____.
Fynjy0 [20]
It's called a star when it creates its own energy
3 0
3 years ago
Other questions:
  • What is the value of a such that p(z < -1.96 = a/2?
    10·1 answer
  • During an autopsy and subsequent toxicology reports, it is discovered that a man died from arsenic poisoning. When investigating
    10·1 answer
  • The pressure inside a champagne bottle can be quite high and can launch a cork explosively. Suppose you open a bottle at sea lev
    15·1 answer
  • A resistor with resistance R is connected to a battery that has emf 13.0 V and internal resistance r = 0.350 Ω . For what two va
    8·1 answer
  • What will be the fermi temperature, if the number density is increased e a) Remains same b) Decreases by a factor of 4 c) Increa
    6·1 answer
  • Suppose you are walking home from school. The distance from school to your is home is five kilometers. On foot,you can get home
    9·2 answers
  • Indirect economic value to Steven and his family,
    9·2 answers
  • How to tell how much work gravity does on something?
    7·1 answer
  • What is the weight of a spring balance when the point is 30​
    8·1 answer
  • Mention the importance of occupation??​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!