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
elena-14-01-66 [18.8K]
3 years ago
8

According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unl

ess acted upon by an external force in that direction. A. True B. False
Physics
1 answer:
Sergeu [11.5K]3 years ago
6 0
The principle of conservation of energy states that energy can neither be created nor destroyed, but can be changed from one form to another. The law of inertia on the other hand states that a body remains at a state of rest or motion on a straight line unless compelled by an external force. So i think that the answer is B, which is FALSE because the question is more related to the law of inertia(Newtons first law) than to the law of conservation of energy. Hope i helped.  
You might be interested in
In doing a load of clothes, a clothes dryer uses 15 A of current at 240 V for 55 min. A personal computer, in contrast, uses 2.7
KatRina [158]

Answer:

Available usage time for the computer = 10.185 hrs

Explanation:

for the dryer;

I = 15 A,    V=240 V  ,  t= 55min,

convert time from min to sec. t = 55*60 =3300 sec

Energy = IVt

Energy = 15*240*3300

Energy = 11,880,000 J

            =11,800 KJ

using the energy for the clothes dryer to calculate for the time spent on the computer,

Energy = IVt

for the computer;

I = 2.7A    V=120V , t=?

t=\frac{energy}{IV}

t=\frac{11,800,000}{2.7*120}

t=36,666.7sec

convert this value to hour by dividing by 3600

t=\frac{36,666.7}{3600} \\t=10.185hrs

5 0
3 years ago
What type of material can charges move through easily?
Katyanochek1 [597]
Pass through it easily is called a Metals such as iron, steel, copper, and aluminum are good conductors.
4 0
3 years ago
A 20 kg mass is dropped from a tall rooftop and accelerates at 9.8 m/s2. What is the weight of the dropped object?
patriot [66]
Objects in free fall are weightless.
6 0
3 years ago
Read 2 more answers
During which time does Jamal have the greatest momentum?
Yuliya22 [10]

Answer:

Momentum Packet Answer KEY - Science Online

YOU WILL SEE THE PDF

4 0
3 years ago
Little Tammy lines up to tackle Jackson to (unsuccessfully) prove the law of conservation of momentum. Tammy’s mass is 34.0 kg a
Leya [2.2K]

Answer:

So Tammy must move with speed 4.76 m/s in opposite direction of Jackson

Explanation:

As per law of conservation of momentum we know that there is no external force on it

So here we can say that initial momentum of the system must be equal to the final momentum of the system

now we have

m_1v_1 + m_2v_2 = 0

final they both comes to rest so here we can say that final momentum must be zero

now we have

34 v + 54 (3 m/s) = 0

v = -4.76 m/s

6 0
3 years ago
Other questions:
  • The chemical equation shown represents photosynthesis. Carbon dioxide plus A plus light with a right-pointing arrow towards B pl
    12·2 answers
  • If the ball increases from 1 m/s to 2 m/s, by how much would<br> kinetic energy increase
    9·1 answer
  • Reproducibility is the ability of data to be .<br>Published<br>Duplicated<br>Changed<br>Invalidated
    5·2 answers
  • A man walks 23 km east and then
    6·1 answer
  • Which sampling method subdivides the population into categories sharing similar characteristics and then selects a sample from e
    11·1 answer
  • How long has a victim been dead if his body temperature was 89.2°F?
    9·2 answers
  • 1.55 J of work was done on the object that moved 5 meters. How much force was applied to the
    5·1 answer
  • What is the velocity of a jet plane that travels 528.0 meters in 4.0 seconds?
    10·1 answer
  • if a car is accelerating downhill under a net force of 3674 N, what additional force would cause the car to have a constant velo
    10·1 answer
  • How many joules are in 3.5kJ?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!