The question is incomplete. Here is the complete question.
The isotope of Plutonium 238Pu is used to make thermoeletric power sources for spacecraft. Suppose that a space probe was launched in 2012 with 3.5 kg of 238Pu.
(a) If the half-life of 238Pu is 87.7 yr, write a function of the form to model the quantity Q(t) of 238Pu left after t years. Round ythe value of k to 3 decimal places. Do not round intermediate calculations.
(b) If 1.7kg of 238Pu is required to power the spacecraft's data transmitter, for low long after launch would scientists be able to receive data? Round to the nearest year. Do not round intermediate calculations.
Answer: (a)
(b) 91 years.
Explanation:
(a) Half-life is time it takes a substance to decrease to half of itself, i.e.:
Q(t) =
k = 0.0079
<u>Knowing k and </u><u>=3.5kg, function is </u><u />
<u />
<u>(</u>b) Using function:
t = 91.41
t ≈ 91 years
<u>Scientists will be able to receive data for approximately 91 years.</u>
Answer:
The pressure altitude is
The density altitude is
Explanation:
From the question we are told that
The outside pressure is
The outside temperature is
Generally the density altitude is mathematically represented as
Here R is the gas constant with value
So
=>
Generally the altitude at which the pressure in the question is experience is
Thus the pressure altitude is
Define displacement and I'll help you
Answer:
Explanation:
Assuming school is at the end of the 20 mile route, then
20 mi / 35 mi/hr = 0.57142...hr
which is about 34 minutes 17 seconds
Answer:
a) C. 7.5 V
b) A. 2.5 V
Explanation:
First, we find the total resistance of the circuit. A voltage divider circuit is a series circuit. Therefore, its total resistance will be the sum of individual resistances:
a)
Now, we will apply the voltage divider rule on this circuit to find the voltage across the 300 Ω Resistor (R₂):
V₂ = 7.5 V
Therefore, the correct option is:
<u>C. 7.5 V</u>
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b)
Now, the voltage across the 100 Ω Resistor (R₁) will be:
Therefore,the correct option is:
<u>A. 2.5 V</u>