I need these ASAP 20 POINTS!!

1 answer:

4 0

Protons give a positive charge and the amount of the protons is what the atomic number is, which is what the atom is such as iron, irons atomic number is 26 this means it has 26 protons, if there were to be two more protons added to it the whole atom would change into a COMPLETELY different element which would be nickel with the atomic number of 28. Neutrons add mass to the atom and electrons balance the amount of negative and positive charges

Neutrons keep the atom stable

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A Viking ship roller coaster at the fair has a mass of 36,000 kg. If at its peak it reaches a height of 20 m off the ground, how

adell [148]

Answer:

7056 kJ

Explanation:

Given that,

Mass of a ship roller coaster is 36,000 kg.

It reaches a height of 20 m off the ground

We need to find the gravitational potential energy does it have. The formula for the gravitational potential energy ios given by :

E = mgh

g is acceleration due to gravity

E = 36,000 kg × 9.8 m/s² × 20 m

= 7056000 J

E = 7056 kJ

So, it will have 7056 kJ of gravitational potential energy.

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2 years ago

Four students are each pushing on one side of a box. Mara is pushing to the west, Cindi is pushing to the east, Chris is pushing

jenyasd209 [6]

Answer:

cindi

Explanation:

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2 years ago

You are trying to measure the mass of several different objects when you realize that there is a large wad of gum stuck to the u

nadya68 [22]

Answer:

accuracy

Explanation:

You are trying to measure the mass of several different objects when you realize that there is a large wad of gum stuck to the underside of the balance pan. Removing the gum will improve the <u>accuracy</u> of your measurements.

6 0

1 year ago

A standing wave is created on a string of length 1.2 m. If the speed of the wave on the string is 60.0 m/s, what is the fundamen

coldgirl [10]

Answer:

Fundamental frequency in the string will be 25 Hz

Explanation:

We have given length of the string L = 1.2 m

Speed of the wave on the string v = 60 m/sec

We have to find the fundamental frequency

Fundamental frequency in the string is equal to $f=\frac{v}{2L}$ , here v is velocity on the string and L is the length of the string