A star has a spectrum with lines indicating the presence of ionized helium. This star should be classified as a(n) _____ type st
2 answers:
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Answer:
Explanation:
The exponential density function is given as
To find probability that bulb fails with the first 300hrs, we integrate from o to 300:
Hence probability of bulb failing within 300hrs is 25.92% or 0.2592
Answer:
68.5N
Explanation:
When the dolphin decelerates from 12m/s to 7.5 m/s within 2.3s. Then its acceleration is:
The dolphin has a mass of 35kg, according to the Newton's 2nd law, the force exerted on it must be:
Answer:
Wy = - 268.3*cos(42) = - 199.38 [N]
Wx = 268.3*sin(42) = 179.52 [N]
Explanation:
To solve this problem we must make a free body diagram, in the attached image we can see a free body diagram.
Taking the inclined X & y axes with the same angle of 42°, we can see that the weight can be decomposed on both axes.
Since the angle is adjacent to the y-axis, we can use the cosine function
Wy = - 268.3*cos(42) = - 199.38 [N]
Wx = 268.3*sin(42) = 179.52 [N]
