Answer:
490,400 J
Explanation:
Mass of first car, m = 1000 kg
Mass of second car, M = 1200 kg
velocity of first car, u = 20 m/s east
velocity of second car, U = 22 m/s west
The formula for the kinetic energy is
where, m is the body and v be the velocity of the body.
Total kinetic energy is given by
k = 490,400 J
Thus, the total kinetic energy of the system is 490,400 J.
Answer:
Magdeburg hemispheres are two half-spheres of equal size. Placing them together traps air between them. This air is merely trapped, and not compressed, so the pressure inside is the same as the pressure of the atmosphere outside the spheres. The spheres thus pull apart with nearly no resistance.
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>
4)Both B and D.This happens becaus3 at the ceryain time, A experiences a flood tide causing the waters to come near it.And since B and D are the closest coastlines they are affected the most.
Answer:
U1 = U2 since the temperature inside the balloon does not change
Q1 - W1 = Q2 - W2
Work done by the balloon = W2 - W1 (on the environment)
W2 - W1 = Q2 - Q1 = 75 J heat put into balloon
So the balloon does 75 J on the environment
