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
yawa3891 [41]
3 years ago
13

Which two statements are true about a system?

Physics
2 answers:
Anna11 [10]3 years ago
6 0
<span>The first choice i correct. The second is also correct as it should obey the Law of Conservation of mass. The third choice is incorrect. It depends on the nature of the system. For example, for an ideal gas, you can define at least 2 parameters to set the system boundaries. The fourth choice is incorrect, a system can be theoretical or practical. Hence, the answers are the first and second choices.</span>
mylen [45]3 years ago
3 0

Answer:

1. A system is a group of objects analyzed as one unit.

2. Energy that moves across system boundaries is conserved.

Explanation:

You might be interested in
What’s the kinetic energy of the object? Use .
Fynjy0 [20]

Answer:

18joules

Explanation:

1/2 of 4=2

2 multiply by 9= 18 joules

4 0
3 years ago
What is the definition of electrical discharge ​
koban [17]

Answer:

electrical conduction through a gas in an applied electric field

Explanation:

7 0
3 years ago
Which of the following most likely happens when the temperature of a chemical reaction is increased?
Diano4ka-milaya [45]
Molecules Speed Up because the other three options only occur when the temperature is decreased.
5 0
3 years ago
Read 2 more answers
A 75-g bullet is fired from a rifle having a barrel 0.540 m long. choose the origin to be at the location where the bullet begin
lyudmila [28]
Part a) The work done by the gas on the bullet is the integral of the force in dx, where x is the distance covered by the bullet inside the barrel with respect to the origin:
W= \int\limits^{0.540m}_{0} {F} \, dx =  \int\limits^{0.540m}_{0} {(16000+10000x-26000x^2)} \, dx =
=16000x+10000  \frac{x^2}{2} - 26000  \frac{x^3}{3}
By substituting the length of the barrel, L=0.540 m, we find the total work done by the gas on the bullet:
W=16000(0.540m)+10000  \frac{(0.540m)^2}{2} - 26000  \frac{(0.540m)^3}{3}  =
=8733 J=8.73 kJ

part b) The resolution of the problem is the same, we just have to use the new length of the barrel (L=0.95 m) inside the final formula, and we find the new value of the work:
W=16000(0.95m)+10000  \frac{(0.95m)^2}{2} - 26000  \frac{(0.95m)^3}{3}  =
=12280 J=12.28 kJ
5 0
3 years ago
1. ________________electricity is the type of electricity commonly used in homes and businesses throughout the world.
amid [387]
Number 1 is letter A
3 0
3 years ago
Other questions:
  • We find that the electric field of a charged disk approaches that of a charged particle for distances y that are large compared
    14·1 answer
  • The diagram below shows a portion of the rock cycle.
    11·1 answer
  • What is a strong, short-lived magnet created by a looped electrical current.
    13·2 answers
  • What is the period (time) that corresponds to oscillatory motion with a frequency of 23.4 Hz when the speed of light is 3.0×10^8
    5·1 answer
  • ) Distinguish between scalar and vector<br>quantities<br>​
    11·1 answer
  • PLZZ IF ANYONE KNOWS SCIENCE HELP ME PLZ I this is so confusing :(
    12·2 answers
  • a effort of 100n can raise a load of 2000n in a hydraulic press. calculate the cross-sectional area of a small piston in it. The
    5·1 answer
  • Based on Newton's 3rd law, the force pairs always act on what?
    13·2 answers
  • Một đĩa tròn có bán kính 20cm đang đứng yên, được quanh nhanh dần đều sau 10s thì đạt vận tốc góc 180 vòng/phút. Hãy xác định: a
    6·1 answer
  • Initial State: An 8-month old child is at rest at the bottom of a staircase.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!