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
Nonamiya [84]
3 years ago
12

A 5.20g bullet moving at 672 m/s strikes a 700g wooden block atrest on a frictionless surface. The bullet emerges, travelingin t

he same direction with its speed reduced to 428 m/s.
a. What is the resulting speed of the block?
b. What is the speed of the bullet-block center of mass?
Physics
1 answer:
Andreyy893 years ago
7 0

Answer:

a) v=1.81 m/s; B) v=4.95 m/s

Explanation:

using momentum conservation

m1v1+m2v1=m1v2+m2v2

A)

5.2*672+700*0=5.2*428+700v2

The initial velocity of the block is 0, solving for v2

v2=1.81 m/s

B) Now both the bullet and the block travel together

m1v1+m2v1=(m1+m2)v2

5.2*672+700*0=(5.2+700)v

v=4.95 m/s

You might be interested in
A small piece of Styrofoam packing material is dropped from a height of 2.60 m above the ground. Until it reaches terminal speed
Vadim26 [7]

Answer:

Explanation:

a ) After the attainment of terminal speed , object takes 4.5 s to cover a distance of 2 m

So terminal speed V = 2 / 4.5

= .444 m /s

When it attains terminal speed , acceleration becomes zero

0 = g - B x .444

B = 22.25 s⁻¹

b ) At t = 0 , v = 0

a = g - B v

a = g at t = 0

c ) When v = .15

a = g - 22.25 x .15

= 9.8 - 3.31

= 6.5  m /s²

7 0
3 years ago
Gamma radiation is composed of neutrons and protons.<br> A. True<br> B. False
konstantin123 [22]

Answer:

false

Explanation:

7 0
2 years ago
On the visible satellite image, the sun’s rays would be reaching earth generally from the
patriot [66]

<span>Visible satellite images are like photos which are dependent on visible light from the sun so they work best during the day. The sensor works by detecting radiation within the range that wavelength is visible. Because of this, the rays is usually seen as reaching earth from the East. </span>

8 0
2 years ago
A 4.0-cm tall light bulb is placed at distance of 8.3 cm from a concave mirror having a focal length of 15.2 cm. Determine the i
scoundrel [369]

Answer: the image distance is -18, 28 cm this means behind of the concave mirror. The image size is 2.2 higher that the original  so it has 8.8 cm with the same orientation as original  and it is a virtual imagen.

Explanation: In order to sove the imagen formation for a concave mirror we have to use the following equation:

1/p+1/q=1/f  where p and q represents the distance to the mirror  for the object and imagen, respectively. f is the focal length for the concave mirror.

replacing the values we obtain:

1/8.3+1/q=1/15.2

so 1/q=(1/15.2)-(1/8.3)=-54.7*10^-3

then q=-18.28 cm

The magnification is given by M=-q/p=-(-18,28)/8.3= 2.2

We also add a picture to see the imagen formation for this case.

6 0
3 years ago
The passage helps the reader to draw conclusions about which character's perspective? ºAlec ºAlice ºAlec's father ºAlec's mother
TiliK225 [7]

Answer:

I think it might be A: Alec but tell me if I'm wrong

Explanation:

4 0
2 years ago
Read 2 more answers
Other questions:
  • How much resistance is required to limit the current to 1.5 mA if the potential drop across the resistor is 6V
    8·1 answer
  • During an autopsy and subsequent toxicology reports, it is discovered that a man died from arsenic poisoning. When investigating
    10·1 answer
  • An electric fan is turned off, and its angular velocity decreases uniformly from 720 rev/min to 200 rev/min in a time interval o
    11·1 answer
  • A 5.00 gram bullet moving at 600 m/s penetrates a tree trunk to a depth of 4.00 cm.
    9·1 answer
  • A car sitting at a red light begins to accelerate at 2 m/s2 when the light turns green. It continues with this acceleration unti
    15·1 answer
  • What is the kinetic energy of a 200kg boat moving at 2.7m/s?
    8·2 answers
  • Could You Take 2 Elements From The Periodic Table Of Elements, and possibly make one of other 116 elements that are on the table
    14·2 answers
  • Select all that apply.
    5·1 answer
  • Es frecuente que en las instalaciones eléctricas domésticas se utilice alambre de cobre de 2.05 mm de diámetro. Determine la res
    6·1 answer
  • A Boeing 787 is initially moving down the runway at 6.0 m/s preparing for takeoff. The pilot pulls on the throttle so that the e
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!