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4 years ago

What is amplitude? I'm pretty dumb lol

2 answers:

7 0

Amplitude refers to the amount by which something is displaced from the middle of its periodic motion. It can mean the maximum disturbance from the neutral position of a wave. It represents the intensity of a vibration, e.g. the loudness of a sound.

Nady [450]4 years ago

3 0

According to the dictionary, amplitude is: "<span>the maximum extent of a vibration or oscillation, measured from the position of equilibrium."
Hope this helps, and happy studying~!
~{Dunsforhands}</span>

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Air bags are designed to deploy in 10 ms. Given that the air bags expand 20 cm as they deploy, estimate the acceleration of the

joja [24]

As it is given that the air bag deploy in time

$t = 10 ms = 0.010 s$

total distance moved by the front face of the bag

$d = 20 cm = 0.20 m$

Now we will use kinematics to find the acceleration

$d = v_i*t + \frac{1}{2}at^2$

$0.20 = 0 + \frac{1}{2}a*0.010^2$

$0.20 = 5 * 10^{-5}* a$

$a = 4000 m/s^2$

now as we know that

$g = 10 m/s^2$

so we have

$a = 400g$

so the acceleration is 400g for the front surface of balloon

3 0

3 years ago

A 7.91g bullet is fired into a 1.52-kg ballistic pendulum initially at rest and becomes embedded in it. The pendulum subsequentl

Stella [2.4K]

Answer:

Explanation:

By law of conservation of momentum:

momentum before collision = momentum after collision

$m_{1} u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2\\ m_1 = mass of bullet\\u_1 = initial speed of bullet\\m_2 = mass of pendulum\\u_2 = initial speed of pendulum\\v_1 = final speed of bullet\\v_2 = final speed of pendulum$

Initial speed of bullet is unknown whereas initial speed of pendulum will be zero as it was at rest.

Final speed of bullet and pendulum will be equal as bullet is embedded in pendulum and both moves together a vertical distance of 6.89cm.

Using third equation of motion:

$2 a S = v_{f}^2 - v_{i}^2$

where:

$a = -g = acceleration due to gravity = 9.8 m/s^2 ( for vertical motion)\\S = h = 6.89cm = Vertical height or distance it covers\\v_f = final speed = 0 (after covering 6.89cm)\\v_i = initial speed (unknown)$

Thus by placing values $v_i = 1.1620 m/s$

this speed will be final speed of collision for the calculation of initial speed of bullet.

Putting values:

$(7.91) * x + (1.52*10^3) * 0 = (7.91 + 1.52*10^3) * 1.162\\7.91 x = 1775.431\\x = 224m/s$

This 224m/s = 0.224Km/s which is closest to D

8 0

3 years ago

What is the name of the process that is responsible for the formation of elements heavier than hydrogen? A) fusion B) fission C)

gladu [14]

Answer:

A) Fusion

Explanation:

Fusions of atoms heavier than hydrogen like helium takes place in the core of the star, at the core the temperature and density of gases is the greatest .

5 0

3 years ago

Which of these physical quantities varies as an object changes its velocity? A. pressure B. mass C. weight D. momentum

kompoz [17]

I believe the answer is B

5 0

3 years ago

Read 2 more answers

Downward force of magnitude 5 N isexerted on the book by the force ofthetablegravityinertia .

mylen [45]

Downward force of magnitude 5 N is exerted on the book by the force of <em>gravity</em>. We call that the "weight" of the book.

At the same time, upward force of 5 N is exerted on the book by the table. This one is called the "normal force".