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ankoles [38]
3 years ago
8

Someone can help me pls Is physical science class

Physics
1 answer:
pentagon [3]3 years ago
6 0

Answer:

<em> I can't see the picture</em>

Explanation:

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One isotope of a metallic element has the mass number 65 and 35 neutrons in the nucleus. the cation derived from the isotope has
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The mass number of an isotope is the sum of the numbers of protons and the numbers of the neutron. Given that the mass number is 65 and the number of neutrons is 35, the number of protons is 30. The atom is then Zinc (Zn). The charge is equal to +2, as it lacks 2 more electrons. 
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A 360-N child is in a swing that is attached to a pair of ropes 1.90 m long. Find the gravitational potential energy of the chil
Igoryamba

Answer:

684J

Explanation:

So basically the formula for gravitational potential energy is Mass X Gravity X height. That is G.p.e = mgh

We don't have the mass but since we have the height, we multiply directly with the height since the quantity of weight is already given.

so G.p.e = 360 X 1.9 = 684J

Note that; The answer is in joules because g.p.e is work done.

Hope that was helpful!!

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What do the mean by cubic expansivity​
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A real cubic expansivity is an increase in the volume of a liquid per unit volume per degree rise in temperature when heated in an inexpansible vessel.
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2 years ago
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Experiments and investigations must be ____. a. approved b. repeatable c. not reproducible d. accepted
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Experiments and investigations must be B. Repeatable.
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To heat the house, the boiler transfers 15 MJ of energy in 10 minutes.
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The formula is P = E/t, where P means power in watts, E means energy j , and t means time in seconds. This formula states that power is the consumption of energy per unit of time.

P = 15 M / 10*60

M = mega = 10⁶

15 *10⁶ / 600

= 25000 watt

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2 years ago
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