c) both magnitude and direction
Answer:
B) Car 2 has both a larger acceleration and a larger average speed.
Explanation:
Car 2 reaches 20 m/s faster than Car 1, so it has a larger acceleration. Car 2 also reaches point B faster than Car 1, so it has the higher average speed.
Answer:
(a) t = 0 s
(b) t = 0 s, 30 s, 55 s
(c) t = 40 s to t = 60 s
(d) t = 10 s to t = 15 s
(e) a = 6 m/s^2
Explanation:
(a) The car is at starting position at t = 0 s and v = 0 m/s.
(b) The velocity of car is zero when the time is t = 0 s, 30 s and 55 s.
(c) from t = 40 s to 60 s the car is moving in the negative direction.
(d) The fastest speed is 60m/s from t = 10 s to t = 15 s.
(e) The slope of the velocity time graph gives acceleration.
a = (60 - 0) / (10 - 0) = 6 m/s^2
C. 16 times
Because depending on this ... (4)^2= 16
And (1)^2 =1
<em>Speed of light in vacuum = 3.0 × 10⁸ m/s</em>
<em>Speed of light in water = 2.25 x 10⁸ m/s</em>
<em>Refractive index of water = ?
</em>
<em>We know that </em>
<em>
</em>
<em>Refractive index of water = </em>
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<em>Refractive index of water = </em>
<em>
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