Explain why the focal point of a diverging lens is called a virtual focal point.
1 answer:
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Answer:
The value is
Explanation:
From the question we are told that
The mass of the Ping-Pong is
The terminal speed is
The drag force is
Generally the resultant force on the Ping- Pong is mathematically represented as
when terminal velocity is attained , the resultant force is zero so
=>
=>
=>
Answer:
117.83° F
Explanation:
Using Newton's Law of Cooling which can be expressed as:
The differential equation can be computed as:
where;
At the initial condition, T(0)= 350
replacing = 280 into (1)
Hence, the differential equation becomes:
when;
time (t) = 1 hour
T(1) = 250
Since;
k = -0.4418
Therefore;
T(t) = 70 + 280e^{(-0.4418)}t
After 4 hours, the temperature is:
T(t) = 70 + 280e^{(-0.4418)}4
T(4) = 117.83° F