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
ser-zykov [4K]
3 years ago
11

Cevab 2 anlatarak çözer misiniz​

Physics
1 answer:
Assoli18 [71]3 years ago
6 0
Translate please, i’d be able to help better:)
You might be interested in
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.90 m/s2 . At 20.0s after blastoff, t
Brilliant_brown [7]

Answer:

A) 580m

B) 0 m/s

C) 9.8m/s^2

D) downward

E) 10.87s

F) 106.62 m/s

Explanation:

A) The distance traveled by the rocket is calculated by using the following expression:

y=\frac{1}{2}at^2

a: acceleration of the rocket = 2.90 m/s^2

t: time of the flight = 20.0 s

y=\frac{1}{2}(2.90\frac{m}{s^2})(20.0s)^2=580m

B) In the highest point the rocket has a velocity with magnitude zero v = 0m/s because there the rocket stops.

C) The engines of the rocket suddenly fails in the highest point. There, the acceleration of the rocket is due to the gravitational force, that is 9.8 m/s^2

D) The acceleration points downward

E) The time the rocket takes to return to the ground is given by:

t=\sqrt{\frac{2y}{g}}=\sqrt{\frac{2(580m)}{9.8m/s^2}}=10.87s

10.87 seconds

F) The velocity just before the rocket arrives to the ground is:

v=\sqrt{2gy}=\sqrt{2(9.8m/s ^2)(580m)}=106.62\frac{m}{s}

6 0
3 years ago
Plutonium-239 is a radioactive isotope commonly used as fuel in nuclear reactors. The half-life of plutonium-239 is 24,100 year
r-ruslan [8.4K]

Answer:

72,300 years.

Explanation:

  • Initial mass of this sample: 504 grams;
  • Current mass of this sample: 63 grams.

What's the ratio between the current and the initial mass of this sample? In other words, what fraction of the initial sample hasn't yet decayed?

\displaystyle \frac{\text{Current Mass}}{\text{Initial Mass}} = \rm \frac{63\; g}{504\; g} = \frac{1}{8}.

The value of this fraction starts at 1 decreases to 1/2 of its initial value after every half-life. How many times shall 1/2 be multiplied to 1 before reaching 1/8? 2^{3} = 8. It takes three half-lives or 3\times 24100 = 72300 years to reach that value.

In certain questions the denominator of the fraction is large. It might not even be an integer power of 2. The base-x logarithm function on calculators could help. Evaluate

\displaystyle \log_{\frac{1}{2}}{\frac{1}{8}} = 3 to find the number of half-lives required. In case the base-x logarithm function isn't available, but the natural logarithm function \ln() is, apply the following expression (derived from the base-changing formula) to get the same result:

\displaystyle \frac{\displaystyle\ln{\left(\frac{1}{8}\right)}}{\displaystyle \ln{\left(\frac{1}{2}\right)}}.

3 0
3 years ago
Which statement describes why energy is released in a nuclear fusion reaction based on mass-energy equivalence? For large nuclei
Delicious77 [7]

Answer: Option (c) is the correct answer.

Explanation:

When two or more small nuclei combine together to form a larger nuclei then this process is known as nuclear reaction.

The smaller is an atom, the more energy it requires to release an electron. This energy is known as binding energy.

Thus, when two small nuclei fuse together then there will be more binding energy as compared to when two large nuclei fuse together.

For example, fusion of two hydrogen atoms release more energy then one helium atom, and upon binding excess energy is released into the space.

Hence, we can conclude that energy is released in a nuclear fusion reaction based on mass-energy equivalence because for small nuclei, the binding energy of the lighter nuclei is greater than the binding energy of the heavier nucleus.




4 0
3 years ago
Read 2 more answers
Gia tốc a và vận tốc v cùng chiều khi nào trong một chu kì dao động điều hòa ?
Drupady [299]

Explanation:

Khi một hạt thực hiện SHM Đang chuyển động từ vị trí cực biên về vị trí trung bình, thì vận tốc và gia tốc cùng hướng, tức là hướng về vị trí trung bình

5 0
3 years ago
When a fuse blows, ______.
sergij07 [2.7K]

Answer:

A and C

Explanation:

4 0
4 years ago
Read 2 more answers
Other questions:
  • Marble and cotton ball friction assignment
    11·1 answer
  • When water condenses onto the grass in the early morning when the air is clear
    14·1 answer
  • Physics questions , will give brainliest
    6·1 answer
  • When voltage is induced in a coil of wire current is?
    10·1 answer
  • A machine part has the shape of a solid uniform sphere of mass 250 g and a diameter of 4.30 cm. It is spinning about a frictionl
    13·1 answer
  • Un libro del peso di 12 N è in equilibrio su un tavolo. Sapendo che il coefficiente di attrito statico vale 0,5, la forza di att
    7·1 answer
  • Cart 1 of mass m is traveling with speed 2vo in the +x-direction when it has an elastic collision with cart 2 of
    12·1 answer
  • Which point has the coordinates of -2.5 5.5​
    15·1 answer
  • Pick the correct word to fill up the blank in below question: magnetic
    8·1 answer
  • And air rifle pellet of mass 2 g Is fired into a block of modelling clay mounted on a model railway track. The trunk and modelli
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!