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Len [333]
3 years ago
15

Please help me on this 3 question I need help.

Chemistry
1 answer:
morpeh [17]3 years ago
8 0
It is harm full to a human because it can make a person really sick and it can hurt a plant by killing it 

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A force of 25 newtons is exerted over an area of 50 square meters. Calculate
snow_lady [41]

Answer:

the pressure exerted in pascals is 0.5 Pa

Explanation:

The computation of the pressure exerted in pascals is shown below:

As we know that

Pressure = force ÷ area

= 25 ÷ 50

= 0.5 Pa

Hence, the pressure exerted in pascals is 0.5 Pa

We simply applied the above formula so that the correct pressure could come

4 0
3 years ago
What energy does a rock resting on a hilltop store?
Hunter-Best [27]

Answer:

gravitational energy

Explanation:

It is gravitational (potential) energy because of the place that the rock holds in the gravitational field. It has <u>potential</u> to move downward, because of <u>gravity</u>.

7 0
3 years ago
molar mass of beryllium (Be) molar mass of silicon (Si) molar mass of calcium (Ca) molar mass of rhodium (Rh)
Neko [114]
Molarmass of beryllium is 9.0
molar mass of silicon is 28.4
molar mass of calcium is 40.1
molar mass of rhodium is 103.
3 0
3 years ago
Read 2 more answers
. The speed of a sound in air is 343 m/s. The sound wave has a frequency of 436 HZ and its period is 0.0023 s. What is the wavel
Taya2010 [7]

Answer: 0.79

Explanation:

6 0
3 years ago
how can the temperature of a substance remain the same even if the substance is absorbing thermal engergy
olchik [2.2K]
When it changes phases energy is needednto break down the bonds so that is can change state from one phase to another.
8 0
3 years ago
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