What is the unit of energy called? (Give name and symbol)

mart [117]

Answer:

hardest

Explanation:

Diamonds are known as the hardest naturally occurring substance known.

4 0

3 years ago

Alisiya [41]

Answer:

a) v(2) = 2m/s, v(3) = -2m/s

b) speed at t = 2s is 2m/s

speed at t = 3s is 2m/s

c) 0 m/s

Explanation:

We can take the derivative of x(t) to find the equation of velocity

v(t) = x'(t) = 10 - 4t

(a) v(2) = 10 - 4*2 = 10 - 8 = 2 m/s

v(3) = 10 - 4*3 = 10 - 12 = -2 m/s

(b) The speed would be the same as velocity without the direction

speed at t = 2s is 2m/s

speed at t = 3s is 2m/s

(c) The average velocity between t = 2s and t = 3s is distance it travels over period of time

$v_a = \frac{s(3) - s(2)}{\Delta t} = \frac{10*3 - 2*3^2 - (10*2 - 2*2^2)}{3 - 2}$

$v_a = \frac{12 - 12}{1} = 0/1 = 0 m/s$

6 0

3 years ago

sveta [45]

Your answer would be C. Hope this helps!!

7 0

3 years ago

ozzi

Hi, your answer is false.

I hoped I helped and if you need more you could always ask me :)

-Dawn

6 0

3 years ago

ivanzaharov [21]

It is the amount of work you have done in a certain amount of time. <span />

3 0

3 years ago