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egoroff_w [7]
3 years ago
7

Why must all deadlier pesticides be developed?

Chemistry
1 answer:
alex41 [277]3 years ago
8 0
Due to the other pesticides have outgrown their strength on today’s insects. All must be accompanied by mass paperwork for safety.
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If a system performs 147 kJ of work while receiving 47 kJ of heat, what is change in its internal energy?
Verdich [7]

Answer:

-100 kJ

Explanation:

We can solve this problem by applying the first law of thermodynamics, which states that:

\Delta U = Q-W

where:

\Delta U is the change in internal energy of a system

Q is the heat absorbed/released by the system (it is positive if absorbed by the system, negative if released by the system)

W is the work done by the system (it is positive if done by the system, negative if done on the system)

For the system in this problem we have:

W = +147 kJ is the work done by the system

Q = +47 kJ is the heat absorbed by the system

So , its change in internal energy is:

\Delta U = +47 - (+147) =-100 kJ

6 0
3 years ago
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4 0
4 years ago
How many liters of P, are in 3.5x1022 molecules at STP?
suter [353]

Answer: they giving you some hard question

Explanation:

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4 0
3 years ago
What element am I?
Serga [27]

Answer:

H- hydrogen

Explanation: Hydrogen is in the first group meaning that it only has 1 valence electron and 1 energy level

4 0
3 years ago
(GIVING BRAINLYIST) Which environment has low temperatures and low humidity?
Greeley [361]

Answer:

The answer would be tundra.

A rain forest has a lot of humidity because it rains a lot otherwise it wouldn't be called a rain forest.

Grassland has a somewhat high temperature and average humidity enough to keep it green and grassy hence grasslands.

A wetland has a lot of water but low temperatures. Still, humidity is water so wetlands aren't it.

Explanation:

Hope this helped.

A brainliest is always appreciated.

7 0
2 years ago
Read 2 more answers
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