The average density of the outer "giant" planets compared with the density of liquid water is

A wooden disk of mass m and radius r has a string of negligible mass is wrapped around it. If the disk is allowed to fall and th

Tju [1.3M]

Answer:

$a = \frac{2}{3}g$

$T = \frac{mg}{3}$

Explanation:

As the disc is unrolling from the thread then at any moment of the time

We have force equation as

$mg - T = ma$

also by torque equation we can say

$TR = I\alpha$

$TR = \frac{1}{2}mR^2(\frac{a}{R})$

$T = \frac{1}{2}ma$

Now we have

$mg - \frac{1}{2}ma = ma$

$mg = \frac{3}{2}ma$

$a = \frac{2}{3}g$

Also from above equation the tension force in the string is

$T = \frac{1}{2}ma$

$T = \frac{mg}{3}$

7 0

4 years ago

The total number of protons plus neutrons in an atom of ⁴⁵₂₀Ca is

lys-0071 [83]

Answer:

b

Explanation:easy

6 0

3 years ago

You have decided that you are ready to start a fitness program. Why is it important to set short-term and long-term goals?

suter [353]

Answer:

Setting short-term and long-term goals is very important to stay on track and motivated to improve fitness levels. You can keep track of your progress by weighing yourself every day to track weight loss, and by steadily increasing the difficulty of the exercises to track your strength improvement. It is very important to reflect on progress, so you can evaluate what you need to do in the future to remain on track, as well as seeing how much you've improved.

5 0

3 years ago

There are two distinct types of nuclear reactions: fusion reactions and fission reactions. In which reaction is the nucleus of a

Marina86 [1]

B) Fission Reactions

Fission is a reaction or decay in which the nucleus of an atom splits into two or more smaller, lighter nuclei.