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Sedaia [141]
3 years ago
11

Over the last several decades, scientists have addressed the problem of nonrenewable natural resources such as fossil fuels. Hum

ans are using fossil fuels at a rapid rate and scientists believe that one day we will run out of them. To solve this problem, research has been conducted on alternative energy sources. One alternative energy source is nuclear energy. Although nuclear energy is a good solution to this problem, there are concerns.
Which of these is NOT a benefit of nuclear energy?
A) fossils fuels are not required
B) does not contribute to global warming
C) presence of hazardous radioactive materials
D) little carbon emissions released into the air

Biology
2 answers:
DerKrebs [107]3 years ago
8 0

Answer: C

Explanation: Had it on USA Test Prep

lakkis [162]3 years ago
7 0

Answer:

C) presence of hazardous radioactive materials

Explanation:

<u>radioactive- emitting or relating to the emission of ionizing radiation or particles.</u>

<h2><em>hint the warning </em>∨</h2><h2>                              ∨</h2><h2>                           </h2><h2>                             </h2>

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What is the mass of all the worker bees in the hive together? Write your answer in scientific notation.
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Answer:

4 × 10^0 kg or 4×E0 kg.

Explanation:

Before delving into or solving the Calculation, let us check one or two things about worker bees.

WHAT IS A WORKER BEE?.

Bees generally are social insects living in an organized community and they consist of three castes which include; the drone bees, worker bees, and the queen bees.

The queen bees are the female bees while the drone bees are the male bees.

The WORKER BEES are female bees too, but the only difference between them and the queen bees is that they (worker bees) do not reproduce like the queen bees. They are saddled with the responsibility of looking for food and maintaining the hive temperature.

Now to the question, the mass of a bee= 1 × 10^-4 kg. And there are 4 × 10^4 bees in hive. Therefore, the mass of all the worker bees in the hive together = (1 × 10^-4) × (4×10^4).

==> 4 × 10^0 kg, or 4E0 kg.

8 0
2 years ago
Suppose a polymerase chain reaction (PCR) amplification process begins with exactly one double-stranded template DNA. How many D
Agata [3.3K]

Answer:

1. Number of DNA molecules after 30 Cycles of PCR = 1.02 x 10^9

2. No. of mutant DNA molecules = 1.07 x 10^9

Explanation:

1. You just have to take the exponential of 2 to the power of the number of PCR cycles (2^n)

2. All copies were normal at cycle 10 that are about 1024 copies. At cycle 11 single point error, all further copies are mutated.

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