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Wewaii [24]
3 years ago
5

A minerral that has no particular planes of weaknees in its lattice structure, so it dose not break along patticular planes. Wha

t happens when this mineral is struck
Biology
1 answer:
alekssr [168]3 years ago
7 0

When the mineral is struck it gets, Fractured.

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Lev Vygotsky believed that learning takes place on two levels. According to him, how do all higher intellectual functions begin?
Aliun [14]

“B” because from our relationships that we learn outside our community it shapes us in what learning standards we would reflect on society where we are learning everyday

7 0
3 years ago
Scientists always prove or disprove their explanations by _____.
Amanda [17]

Correct answer: A). Gathering evidence

The scientific explanation uses measurements and observations in order to explain something in the natural world. The Scientist uses the scientific method to collect evidence in the experiment that is related to the hypothesis.

They can gather the evidence by just observing the natural world and its phenomena or by performing an experiment in the laboratory or by running a model.

Hence, the correct answer would be option A.

4 0
3 years ago
Salivary amylase is released in the mouth where it breaks down sugars. however, it is inactive once it reaches the stomach where
GREYUIT [131]
<span>Amylase needs an optimum pH for its activity. It is in the range of 6-7. Below or above pH will denature this enzyme. The pH level is optimum for this enzyme in the mouth and hence it catalyses the break down of sugar. The pH level of stomach is lower than its optimum level duet to the activity of gastric acid. Hence the enzyme becomes inactive in the stomach.</span>
5 0
3 years ago
The half — life of nickel is 96 years. How much of a 30-gram sample is left after 270 years?
-Dominant- [34]

The amount of the 30 gram-sample that will remain after 270 years is 6.61 grams

<h3>How to determine the number of half-lives </h3>

We'll begin by obtaining the number of half lives that has elapsed. This can be obtained as follow:

  • Half-life (t½) = 96 years
  • Time (t) = 270 years
  • Number of half-lives (n) =?

n = t / t½

n = 270 / 99

n = 2.8125

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 30 grams
  • Number of half-lives (n) = 2.8125
  • Amount remaining (N) =?

The amount remaing can be obtained as follow:

N = N₀ / 2^n

N = 30 / 2^2.8125

N = 6.61 grams

Learn more about half life:

brainly.com/question/26374513

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5 0
1 year ago
Which statement best describes what occurs to a molecular of the enzymes trysin after it bind to a molecular of protein
padilas [110]

Trypins breaks down the protien into simple amino acids which are absorbed by the gut wall.

8 0
3 years ago
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