Acceleration = (Speed or velocity) / Time
= 45/9
= 5 m/s²
Im not so sure but it should be the
instantaneous speed
Answer:
1. A
sound can't travel through vacuum only
7.11x 10⁶J
Explanation:
Given parameters:
Speed of light = 3 x 10⁸m/s
Mass of object = 23.7g = 0.0237kg
Unknown:
Energy = ?
Solution:
From Einstein's equation, we see that mass and energy are equivalent using the expression below:
E = mc²
Substituting the parameters:
E = 3 x 10⁸ x 0.0237 = 7.11x 10⁶J
Learn more:
Energy brainly.com/question/5381158
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