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
maks197457 [2]
3 years ago
7

A block of wood mass 0.60kg is balanced on top of a vertical port 2.0m high. A 10gm bullet is fired horizontally into the block

and the embedded bullet land at a 4.0m from the base of the port. Find the initial velocity of the bullet.
Physics
1 answer:
anzhelika [568]3 years ago
7 0

Answer:

Mass of bullet is m=0.01kg

Mass of the block is M=4kg

Coefficient=0.25,distance=20m

So, let the speed of the block just after the bullet embedded in it be V and v be the speed of bullet before striking the block,

By applying conservation of momentum,

mv=(m+M)V

V=

M+m

mv

Explanation:

please mark me as the brainliest answer and please follow me for more answers to your questions..

You might be interested in
S/REF No. Date If the load distance of a level is 20 cm and effort distance is 6ocm, calculate the amount of effort required to
andrew11 [14]
The answer is 602 cause I added
7 0
3 years ago
Why is plate tectonics a widely accepted theory?
MariettaO [177]

Answer: The theory of Plate Tectonics is now widely accepted because there is sufficient proof to support it, and it is an important aspect of geology, oceanography, geophysics and even paleontology.

Explanation: In places where a plate faced resistance to its movement, it would fold upward and create mountains. Hope this helped! :)

6 0
3 years ago
Protons have a positive charge<br><br> A.True<br> B.False
PIT_PIT [208]

Answer:

TRUE

Explanation:

Protons have a positive charge. Electrons have a negative charge. The charge on the proton and electron are exactly the same size but opposite. Neutrons have no charge.

5 0
3 years ago
Read 2 more answers
Okay! Last question was a warm-up question. And now to get your brain thinking some more, how about another one?:
den301095 [7]
The correct answer is a fishhook
5 0
3 years ago
A coil with an inductance of 2.8 H and a resistance of 12 Ω is suddenly connected to an ideal battery with ε = 89 V. At 0.086 s
Thepotemich [5.8K]

Answer:

The stored energy is 140.7 watt.

The thermal energy is 62.7 watt.

The delivered energy is 203.4 watt.

Explanation:

Given that,

Inductance = 2.8 H

Resistance = 12 Ω

Potential \epsilon_{0}=89\ V

Time = 0.086 s

(a). We need to calculate the energy stored in the magnetic field

Using formula of current

i=i_{max}(1-e^(\frac{-t}{\tau}))

Using formula of energy

U=\dfrac{1}{2}Li^2

On differentiating

\dfrac{dU}{dt}=Li\frac{di}{dt}

\dfrac{dU}{dt}=L\dfrac{d}{dt}(i_{max}(1-e^(\frac{-t}{\tau}))

Again differentiating

\dfrac{dU}{dt}=\dfrac{\epsilon^2}{R}(1-e^{\frac{-t}{\tau}})e^{\frac{-t}{\tau}}

\dfrac{dU}{dt}=\dfrac{\epsilon^2}{R}(1-e^{\frac{-\t\times R}{L}})e^{\frac{-t\times R}{L}}

Put the value into the formula

\dfrac{dU}{dt}=\dfrac{(89)^2}{12}(1-e^{\dfrac{-0.086\times12}{2.8}})e^{\dfrac{-0.086\times12}{2.8}}

\dfrac{dU}{dt}=140.7\ watt

(b). We need to calculate the thermal energy

Using formula of thermal energy

P=i^2R

P=\dfrac{\epsilon^2}{R}(1-e^{\frac{-t}{\tau}})^2

Put the value into the formula

P=\dfrac{89^2}{12}(1-e^{\dfrac{-0.086\times12}{2.8}})^2

P=62.7\ Watt

(c). We need to calculate the delivered energy by the battery

Using formula of energy

P'=P+\dfrac{dU}{dt}

P'=62.7+140.7

P'=203.4\ watt

Hence, The stored energy is 140.7 watt.

The thermal energy is 62.7 watt.

The delivered energy is 203.4 watt.

5 0
3 years ago
Other questions:
  • In a certain time interval, natural gas with energy content of 19000 J was piped into a house during a winter day. In the same t
    12·2 answers
  • Two gliders collide on a frictionless air track that is aligned along the x axis. Glider A has an initial velocity of +4.0 m/s a
    13·1 answer
  • In concave mirror, the size of image depends upon
    12·2 answers
  • Can someone list two non-examples of volcano formations/eruptions?
    8·1 answer
  • What is calculated by speed of light/wavelength?
    15·1 answer
  • Consider a human population that consumes a certain resource. Which of the following statements about this situation is most lik
    11·2 answers
  • Does the mass of a supermassive black hole correlate with any other part of a galaxy?
    13·1 answer
  • Biologists use optical tweezers to manipulate micron-sized objects using a beam of light. In this technique, a laser beam is foc
    8·1 answer
  • An electromagnetic wave in vacuum has an electric field amplitude of 470 V/m. Calculate the amplitude of the corresponding magne
    14·1 answer
  • a spring has a force constant of 100 n/m and an unstretched length of 0.07 m. one end is attached to a post that is free to rota
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!