Which of the following is considered a noncovalent bond?A. Electrostatic interactions.
B. Hydrogen bonds.
C. Van der Waals interactions.
D. All of the above.

Answers

Answer 1

Answer: Hydrogen bonds I’m pretty sure

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A gazelle is born with slightly longer legs which allow it to run faster than the other gazelles in the herd. This adaptation came may have come about becausea. the gazelle needed to be able to run faster.
b. the gazelle's parents were not able to outrun a cheetah.
c. there was a mutation in the gazelle's genetic code.
d. the gazelle did not get enough nutritious food after it was born.

Answers

Because there was a mutation in the gazelle's genetic code. It will be nice for the gazelle to run faster, but since the gazelle was born with longer legs, we know it's just a random mutation. The gazelle's parents have little to do with it, and the nutrition of the food it eats after it's born is irrelevant to how long its legs are at birth.

Otherwise known as answer: C.

Gold is opaque and reflective. It has a _____.-glassy luster
-metallic luster
-dull luster
-pearly luster

Answers

Answer: The correct answer for the fill in the blank is metallic luster.

Gold is a metal. Thus, it possesses all the properties of metal like ductility, malleability, conduction of heat and electricity, metallic luster.

When the light interact with the surface of gold, it produces brilliant shine. This shine is referred to as its metallic luster.

Gold is opaque and reflective. When light strikes gold surface, it is reflected back and does not pass through gold.

Thus, the correct answer for the fill in the blank is metallic luster.

Gold has a metallic luster. Go panning for gold in a river bed...those little flakes catch the sun in such a way that you KNOW it is gold. A dull luster would not show this.

which of the following is being used to catch fish? A.electricity B. light C. sound D. all of the above

Answers

B-light because ,using electricity might electrocuted the fish and making noises will just scare the fish away.

Answer:

Explanation:

Describe an early monotreme mammal.

Answers

Monotremes are egg-laying mammals. The young are not born, but hatched.

If a system requires 150 J of input work and produces 123 J of output work, what's its efficiency?

Answers

The efficiency of work is a dimensionless value, and is equivalent to the ratio of the actual work output to the theoretical work requirement. This can be calculated using the equation:

Efficiency = (actual work) / (work requirement) = 123/150 = 0.82

The higher the efficiency, the better performance is given by the system. In reality, efficiency is always lower than 1 which is the ideal value.

Nitrogen is important to life because it is part of _____. DNA, amino acids, and proteins plant photosynthesis the air we breathe lightning storms