Answer:
b
Explanation:
n = m(g +a)
n= normal force (N)
m=mass (kg)
g=acceleration of gravity
a= acceleration of elevator
rearrange:
a= n/m - g
a= (810 N/73 kg) - 9.8 m/s ^2
a= 1.3 m/s ^2 up
and the acceleration is upwards bc her weight is less than the scale reading
The answer is True. You can speed up chemical reactions by using a recyclable substance called a reactant.
Answer: W.D = 1/2mv^2
Explanation:
If an external force or a single force is acting on a body. Just like the first law of thermodynamics, the force acting on the body will cause work done on the system.
Work done = force × distance
And the work done on the body will cause the molecules of the body to experience motion and thereby producing kinetic energy.
The work done will be converted to kinetic energy.
W.D = 1/2mv^2
Answer:
<em>Physical activities play an important role in manage our stress levels</em>.
<u>Explanation:
</u>
In our daily life <em>we face many stressful experiences such as job, studies, a chronic disease </em>etc., <em>the brain send warnings to the muscles and to the adrenal glands which releases adrenaline and cortisol</em>. <em>Stress leads to high blood pleasure and there are many strategies to manage our stress,</em> keeping our mind in a positive attitude helps to reduce stress levels.<em> Doing physical activities keep our mind away from stress. Yoga, Meditation, Deep breathing exercises, Aerobics keeps our mind free from stress.</em>
Answer:
If clouds were made of cotton candy, I think rain would be soda.
Or liquified sugar.
:)
