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
erica [24]
3 years ago
10

Pouvez vous m'aider dans ce devoir sil vous plait.​

Physics
1 answer:
ahrayia [7]3 years ago
8 0

in english please

i don't understand actually

You might be interested in
Which of the following is an echinoderm that moves by waving its arms?
sukhopar [10]
B. Brittle Star is an echinoderm that moves by waving its arms.

Brittle star is a spiny, hard-skinned, long-armed animal, related to sea star, that lives on rocky sea floor, from shallow areas to the deepest areas. It uses its flexible arms for locomotion.


4 0
3 years ago
Read 2 more answers
Natasha weighs 530N. what is her kinetic energy as she swimsat
WITCHER [35]

<u>Answer:</u> The kinetic energy of Natasha as she swim is 38.88 J

<u>Explanation:</u>

Force is defined as the mass multiplied by the acceleration of the object.

Mathematically,

F=m\times a

where,

F = weight of Natasha = 530 N

m = mass of Natasha = ?

a = acceleration due to gravity = 9.8m/s^2

Putting values in above equation, we get:

530kg.m/s^2=m\times 9.8m/s^2\\\\m=\frac{530}{9.8}=54kg

Speed is defined as the rate at which an object moves with respect to time.  To calculate the speed, we use the equation:

s=\frac{d}{t}

where,

d = distance traveled = 72 m

t = time taken by Natasha = 1.0 min = 60 sec   (Conversion factor:  1 min = 60 s)

Putting values in above equation, we get:

s=\frac{72}{60}=1.2m/s

Kinetic energy is defined as the energy which is possessed due to its motion.  It is also defined as the half of the product of mass of the object and square of the velocity of the object.

Mathematically,

E_K=\frac{1}{2}mv^2

where,

E_K = kinetic energy of Natasha

m = mass of the Natasha = 54 kg

v = velocity of Natasha = 1.2 m/s

Putting values in above equation, we get:

E_K=\frac{1}{2}\times 54\times (1.2)^2\\\\E_K=38.88J

Hence, the kinetic energy of Natasha as she swim is 38.88 J

3 0
3 years ago
Which of the following best describes the behavior of the above pair of substance.
LenaWriter [7]
<span>B. insoluble hope this helps</span>
3 0
3 years ago
Which best describes a reference frame?
Anon25 [30]

Answer: A system or frame of reference are those conventions used by an observer (usually standing at a point on the ground) to be able to measure the position and other physical magnitudes.

3 0
3 years ago
The presence of which phenomenon proved the predictability of the big bang theory
alekssr [168]
The measurement of the expansion of the universe was what gave rise to the big bang theory and it's predictions.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which characteristics do all terrestrial planets have?
    13·2 answers
  • A 1.00-kmkm length of power line carries a total charge of 230 mCmC distributed uniformly over its length. Find the magnitude of
    13·1 answer
  • There is a hydraulic system that by means of a 5 cm diameter plunger to which a 5 N force is applied and that force is transmitt
    13·1 answer
  • What was the name of john daltons theory
    10·1 answer
  • If two opposite charges get farther apart, does their attraction for each other increase, decrease, or remain the same?​
    11·1 answer
  • Which choice most accurately defines resistance and voltage of a circuit?
    12·1 answer
  • what color does acid turn red litmus papera substance tested with blue litmus paper, is clear and colorless, and feels slippery.
    7·1 answer
  • 1) Momenum is
    11·1 answer
  • PLEASEE HELPP
    13·1 answer
  • Gravity can *
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!