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
OverLord2011 [107]
3 years ago
9

A rifle with a weight of 25 N fires a 4.0 g bullet with a speed of 290 m/s.

Physics
1 answer:
Ugo [173]3 years ago
3 0

Answer:

Explanation:

Given

Weight of rifle W=25\ N

mass of rifle M=\frac{25}{10}=2.5\ kg

mass of bullet m=4\ gm

speed of bullet u=290\ m/s

As there is no net force on the bullet-rifle system therefore momentum is conserved

0=Mv+mu

v=-\frac{mu}{M}

v=-\frac{4\times 10^{-3}\times 290}{2.5}

v=-0.464\ m/s

i.e. opposite to the direction of bullet speed

(b)Weight of Man =750\ N

Combined weight of man and rifle=750+25=775\ N

mass of man-rifle system M'=\frac{775}{10}=77.5\ kg

Now man and rifle combinedly recoil

therefore

0=(M')v '+mu

v'=-\frac{mu}{M'}

v'=-\frac{4\times 10^{-3}\times 290}{77.5}

v'=0.0149\ m/s

You might be interested in
This is “Fusion Reactions”.<br> Please answer number 8. Thank you.
Angelina_Jolie [31]

Answer:

²₁H + ³₂He —> ⁴₂He + ¹₁H

Explanation:

From the question given above,

²₁H + ³₂He —> __ + ¹₁H

Let ⁿₐX be the unknown.

Thus the equation becomes:

²₁H + ³₂He —> ⁿₐX + ¹₁H

We shall determine, n, a and X. This can be obtained as follow:

For n:

2 + 3 = n + 1

5 = n + 1

Collect like terms

n = 5 – 1

n = 4

For a:

1 + 2 = a + 1

3 = a + 1

Collect like terms

a = 3 – 1

a = 2

For X:

n = 4

a = 2

X =?

ⁿₐX => ⁴₂X => ⁴₂He

Thus, the balanced equation is

²₁H + ³₂He —> ⁴₂He + ¹₁H

8 0
3 years ago
What is the difference between continuous and a discontinuous spectrum?
aleksklad [387]
A continuous spectrum contains all the wavelengths 

A discontinuous spectrum has strips of specific colors and can be used to identify the elements making it.

hope this helps

5 0
3 years ago
The two concepts or issues that you chose and explain how each either has contributed to or detracted from social change, specif
Rom4ik [11]

Racial equality directed to a scenario in which individuals of all races and ethnicities exists treated equally, regardless of any differences in physical characteristics.

<h3>What is meant by racial equality? </h3>

Racial equality occurs when organizations, like schools, give people of all races equal chances regardless of their physical characteristics, such skin color. It has always been difficult for ethnic minorities to achieve equality, especially in educational institutions.

According to research, black pupils face fewer expectations from their teachers and are more likely to be suspended or expelled than white students. They are also less likely to be enrolled in gifted programs.

The term "racial equality" describes a situation in which people of all races and ethnicities are treated equally, regardless of any physical distinctions. Racial equality occurs when institutions uphold people's moral, legal, and political rights.

To learn more about Racial equality refer to:

brainly.com/question/12645755

#SPJ9

3 0
1 year ago
What is a heterogeneous mixture and what is a homogeneous mixture?
yuradex [85]
A heterogeneous mixture is a mixture that contains two or more distinct substances that you can see. You can see the different part if a heterogeneous mixture. An example of this is a salad. You can see all of the parts. A homogeneous mixture is a mixture that is uniform and you cannot see the different parts. It is still a mixture though. An example of that would be salt water. The water and salt are not chemically combined but you cannot see the salt AND water. It is just one solution.
5 0
3 years ago
Read 2 more answers
A 57 kg person in a rollercoaster moving through the bottom of a curved track of radius 42.7 m feels a normal force of 995 N. Ho
natita [175]

Answer:

Use Fc centripetal force as positive and W the weight as negative

N = m v^2 / R + m g

v^2 = (N - m g) R / m

v^2 = (995 - 57 * 9.8) 42.7 / 57 = 327 m^2/s^2

v = 18.1 m/s

Note: N - m g is the net force producing the centripetal force

5 0
2 years ago
Other questions:
  • 2. A body moves with a uniform speed of 1.5 ms-1 for 20 seconds. Find the distance covered by it.
    9·1 answer
  • A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simp
    7·1 answer
  • The mineral needed in blood is.<br> 1.iodine<br> 2.oxygen<br> 3.iron<br> 4.soduim<br> 5.hemoglobin
    10·2 answers
  • ____ is the thermal energy transfer that occurs from the motion of fluid in a liquid or gas.
    10·2 answers
  • Two charges q1 and q2, that are distance d apart , repel each other with a force of 6.40 N. what would be the force between two
    8·1 answer
  • When the distance between two masses is doubled, the gravitational attraction between
    10·1 answer
  • A bullet of 5 gm is fired from a pistol of 1.5 kg. If the recoil velocity of pistol is 1.5 m/s,
    6·1 answer
  • What are power tools​
    15·2 answers
  • Which has more inertia - a 2,750 gram object or a 2,500 gram object?
    11·2 answers
  • Why is simple harmonic motion a fundamental for understanding physics
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!