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Viktor [21]
2 years ago
6

Gravity pushes objects away from each other TRUE OR FALSE

Physics
1 answer:
e-lub [12.9K]2 years ago
5 0

Answer:

false

Explanation:

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A box is initially sliding across a frictionless floor toward a spring which is attached to a wall. the box hits the end of the
Serjik [45]
The elastic potential energy of a spring is given by
U= \frac{1}{2}kx^2
where k is the spring's constant and x is the displacement with respect to the relaxed position of the spring.

The work done by the spring is the negative of the potential energy difference between the final and initial condition of the spring:
W=-\Delta U =  \frac{1}{2}kx_i^2 -  \frac{1}{2}kx_f^2

In our problem, initially the spring is uncompressed, so x_i=0. Therefore, the work done by the spring when it is compressed until x_f is
W=- \frac{1}{2}kx_f^2
And this value is actually negative, because the box is responsible for the spring's compression, so the work is done by the box.
8 0
3 years ago
20. <br> All financial goals are long-term goals.<br> True<br> False
Firdavs [7]

Answer:

Hello todays answer should be False i am sorry if i am incorrect-Lucy

Explanation:

8 0
2 years ago
Read 2 more answers
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s 1045 rad/s ). If a particular disk is
Scilla [17]

Answer:

The magnitude of the average angular acceleration of the disk is 4139.74\ rad/s^2.

Explanation:

Given that,

Angular velocity, \omega_i=968.7\ rad/s

The disk comes to rest, \omega_i=0

Time, t = 0.234 s

We need to find the magnitude of the average angular acceleration of the disk. It is given by change in angular velocity per unit time. So,

\alpha =\dfrac{\omega f}{t}\\\\\alpha =\dfrac{968.7\ rad/s}{0.234\ s}\\\\\alpha =4139.74\ rad/s^2

So, the magnitude of the average angular acceleration of the disk is 4139.74\ rad/s^2.

5 0
2 years ago
What is meant by infinite slew rate
Dennis_Churaev [7]
Am infinite slew rate means that the changes in the output voltage occur immensely when the input voltage changes.
Slew rate is measurement of the response of an operational amplifier. For an ideal operational amplifier, time delay is negligible. Hence it has an infinite slew rate.
In simpler terms it means that it can provide output voltage simultaneously with the input voltage changes.

Hope this helps :)
3 0
2 years ago
Find the frequency if the period is 15 us.
Sav [38]

Answer:

The frequency is 0.667× 10^{6} Hz.

Explanation:

  1. Period is defined as the time taken by any element to attempt one complete oscillatory motion in one second.
  2. Frequency is the number of complete oscillations made in one second.
  • Frequency and period are inversely proportional to each other.
  • In mathematical term: frequency = \frac{1}{period}.
  • As we are given, period = 15×10^{-6} s.
  • We can easily calculate frequency as: f\\= \frac{1}{15. 10^{-6} }
  • So frequency is f= 0.667× 10^{6} Hz.
6 0
3 years ago
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