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3 years ago

Question 1 of 10

Physics

1 answer:

Marianna [84]3 years ago

6 0

Answer:

Option D. ²²²₉₀Th

Explanation:

Let the unknown be ⁿₘZ. Thus, the equation becomes:

²²⁶₉₂U —> ⁴₂He + ⁿₘZ

Next, we shall determine n, m and Z. This can be obtained as follow:

For n:

226 = 4 + n

Collect like terms

226 – 4 = n

222 = n

n = 222

For m:

92 = 2 + m

Collect like terms

92 – 2 = m

90 = m

m = 90

For Z:

ⁿₘZ => ²²²₉₀Z => ²²²₉₀Th

Therefore, the complete equation becomes:

²²⁶₉₂U —> ⁴₂He + ⁿₘZ

²²⁶₉₂U —> ⁴₂He + ²²²₉₀Th

Thus, the unknown is ²²²₉₀Th

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A jet plane is launched from a catapult on an aircraft carrier. In 2.0 s it reaches a speed of 42 m/s at the end of the catapult

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Answer:

Explanation:

Given

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Speed acquired in 2 sec $v=42\ m/s$

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$a=\frac{v-u}{t}$

$a=\frac{42-0}{2}=21\ m/s^2$

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Assume a solar cell would produce a current of 500mA and 3 V. What is the power of this solar cell?

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Answer:

the power of the solar cell is 1.5 watts

Explanation:

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