2 years ago

Which of the following is the best hypothesis

Physics

1 answer:

tekilochka [14]2 years ago

5 0

Answer:

Melting and frezzing are physical changes

You might be interested in

NEED HELP ASAP!!!!

podryga [215]

The answer is B
I rhink

6 0

2 years ago

How can I get the temperature?<br><br> Sound Speed = 331 m/s + (0,6xTemperature)

Alla [95]

need speed of sound on lhs

7 0

3 years ago

What were the two classifications of motion according to Aristotle?

wel

Answer:

natural motion and violent motion

Explanation:

8 0

2 years ago

What type of motion occurs when an object spins around an axis without altering its linear position?

Zepler [3.9K]

That would be called "rotation".

8 0

2 years ago

Read 2 more answers

A student holds a bike wheel and starts it spinning with an initial angular speed of 9.0 rotations per second. The wheel is subj

KATRIN_1 [288]

Answer:

$\Delta t = 8 s$

Explanation:

As we know that the angular acceleration of the wheel due to friction is constant

so we can use kinematics

$\theta = \omega_i t + \frac{1}{2}\alpha t^2$

so we have

$(65 \times 2\pi) = (2\pi \times 9)(10) + \frac{1}{2}(\alpha)(10^2)$

$130\pi = 180\pi + 50 \alpha$

$\alpha = -\pi rad/s^2$

now time required to completely stop the wheel is given as

$\omega_f = \omega_i + \alpha t$

$0 = (2\pi \times 9) + (-\pi) t$

$t = 18 s$

now time required to stop the wheel is given as

$\Delta t = 18 - 10$

$\Delta t = 8 s$

6 0

2 years ago