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
DENIUS [597]
3 years ago
11

A 35.0 g bullet strikes a 50 kg stationary piece of lumber and embeds itself in the wood. The piece of lumber and the bullet fly

off together at 8.6 m/s. What was the speed of the ballot before it struck the lumbar? Define the bullet and the wood as a system
Physics
1 answer:
astraxan [27]3 years ago
4 0

Answer:

12294.31 m/s

Explanation:

Momentum = (mass)(velocity)

Momentum before = Momentum after

(momentum of bullet)+(momentum of block)=(momentum of bullet and block)

0.035v+50(0)=(0.035+50)(8.6)

0.035v=430.301

v=12294.3142857m/s

You might be interested in
An ice cube tray full of water is put into a freezer. The water eventually reaches 0ºC and undergoes a phase change from a liqui
jek_recluse [69]

Answer:

a

Explanation:

the kinetic energy decreases which makes the molecules bond together, that makes them not be able to move much

3 0
3 years ago
A circular loop of radius r carries a current i. at what distance along the axis of the loop is the magnetic field one-half its
lana [24]

At r = 0.766 R the magnetic field intensity will be half of its value at the center of the current carrying loop.

We have a circular loop of radius ' r ' carrying current ' i '.

We have to find at what distance along the axis of the loop is the magnetic field one-half its value at the center of the loop.

<h3>What is the formula to calculate the Magnetic field intensity due to a current carrying circular loop at a point on its axis?</h3>

The formula to calculate the magnetic field intensity due to a current carrying ( i ) circular loop of radius ' R ' at a distance ' x ' on its axis is given by -

B(x) = \frac{\mu_{o} iR^{2} }{2(x^{2} +R^{2})^{\frac{3}{2} } }

Now, for magnetic field intensity at the center of the loop can calculated by putting x = 0 in the above equation. On solving, we get -

B(0) = \frac{\mu_{o} i}{2R}

Let us assume that the distance at which the magnetic field intensity is one-half its value at the center of the loop be ' r '. Then -

\frac{\mu_{o} iR^{2} }{2(r^{2} +R^{2})^{\frac{3}{2} } } = \frac{1}{2} \frac{\mu_{o}i }{2R}

2R^{3} = (r^{2} +R^{2} )^{\frac{3}{2} }

4R^{6} = (r^{2} +R^{2} )^{3}

r^{2} =0.587R^{2}

r = 0.766R

Hence, at r = 0.766 R - the magnetic field intensity will be half of its value at the center of the current carrying loop.

To solve more questions on magnetic field intensity, visit the link below-

brainly.com/question/15553675

#SPJ4

6 0
2 years ago
How is energy transferred between trophic levels in a food chain?
Anastaziya [24]

Answer:

The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10% of the energy at any trophic level is transferred to the next level, the rest is lost largely through metabolic processes as heat.

8 0
3 years ago
A car accelerates uniformly from rest at 2.2 m / s^2 for 3.0 s.Calculate the speed of the car at time t = 3.0 s
Alexxx [7]

Answer:

6.6m/s

Explanation:

we know that

v = u + at

= 0+ 2.2*3

=6.6m/s

4 0
4 years ago
19. Use a scale ray diagram to find the image position of
luda_lava [24]
I hope that helps you!!!!!!

7 0
3 years ago
Other questions:
  • A train starting from rest picks up a speed of 20 m/s in 20 s while travelling on a straight path. It continues to move at the s
    6·1 answer
  • The depth of water behind the Hoover Dam is 220 m. Find the water pressure at the base of this dam.
    13·1 answer
  • A source charge generates an electric field of 1236 N/C at a distance of 4 m. What is the magnitude of the source charge?
    8·2 answers
  • Starting from rest, a car travels 18 meters as it accelerates uniformly for 3.0 seconds. What is the magnitude of
    12·1 answer
  • Which of the following BEST explains how good body composition is attained?
    5·1 answer
  • A girl stands on the edge of a merry-go-round of radius 1.71 m. If the merry go round uniformly accerlerates from rest to 20 rpm
    6·1 answer
  • A sled with a mass of 32 kg is being pulled across the snow. If the friction force between the sled and the ground is 12 N, what
    15·1 answer
  • A student is trying to demonstrate static electricity, so they rub two identical balloons with a neutral rabbit fur to give them
    7·1 answer
  • An electrolyte is . . . . .
    8·1 answer
  • i need physics help.The charge of an electron is - 1.6 x 10^ -19 C.Show that there are about 3 x 10^18 electrons in 5 x 10^8 nC
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!