Answer:
W = 71J
Explanation:
Given force F = (5i+5j−1k)N
d = Δr
r1 = (−5,−3,−4)m
r2 = (2,5,0)m
Δr = r2 – r1 = (2-(-5), 5-(-3), 0-(-4))
Δr = (2+5, 5+3, 0+4) = (7i+ 8j +4k)m
W = F•d = (5i+5j−1k)•(7i+ 8j +4k)
W = 5×7 + 5×8 +-1×4 = 35 + 40 - 4
W = 71J
Answer:
Electric energy is the answer
Explanation:
Just think
Answer:
It's Option D
Explanation:
Red line bounces off left side of black line.
Answer: Meteors
Explanation:
The moon does not have an atmosphere. Thus, it does not have weather patterns like on Earth. No winds blow on it unlike on Earth where wind and water cause soil erosion.
On moon, high speed space dust and rocks of all sizes hit and cause the erosion of rocks. In the absence of atmosphere, these space rocks are not burnt away but hit the surface creating craters.
When an object absorbs an amount of energy equal to Q, its temperature raises by
following the formula
where m is the mass of the object and
is the specific heat capacity of the material.
In our problem, we have
,
and
, so we can re-arrange the formula and substitute the numbers to find the specific heat capacity of the metal: