Momentum is Mass times Velocity
Answer:
The correct answer is 5.77 cm
Explanation:
Solution
From the question given, let us recall the following,
A sunny day = 60°F and
The sun above the horizon is = 60°
The surface of a shallow pond is = 20 cm deep
The stick above sand = 10 cm
The next step is to find the length of the shadow
Now,
let CD = stick
BC= Length of shadow
Thus,
CD/BC = Tan 60°
BC = CD/Tan 60°
= 10/√3 = 5.77 cm
Therefore, the length of the shadow is 5.77 cm
Answer:
40 seconds
Explanation:
A unicorn is running at rate of 3 meters/second. To find how long it'll take to get at the end of a 120 meter rainbow, we'll have to find the "time".
The distance is given to be 120 meters and speed is given as 3 meters/second.
Our formula for speed is:
where v is speed, s is distance and t is time:
Solve for t, multiply both sides by t:
Divide both sides by 3:
Therefore, it will take 40 seconds for a unicorn to reach at the end of rainbow.