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3 years ago

Find the missing spaces in the charts below! Please!

Physics

1 answer:

Neko [114]3 years ago

5 0

Answer:

Zinc- Zn

Mass Numbers:

Tin-118.71 u

Zinc- 65.38

Protons:

Tin-50

Atomic number zinc 45.38

Zinc has 30 electrons

Tin has 50 electrons

35 neutrons in zinc

iodine-

atomic number- 53

78 neutrons

cl-1 is chlorine

atomic number 17

18 neutrons

17 electrons

atomic number 35 is bromine

symbol Br

35 protons

45 neutrons

35 electrons

Aluminium

protons and electrons 13

neutrons 14

atomic number 14

fe+2

26 protons

24 electrons

30 neutrons

ferrous iron

Cu+1 copper

63.546 mass number

proton and electron 29

neutron 35

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3 years ago

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Alexeev081 [22]

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3 years ago

What is the mass of a baseball that has a kinetic energy of 105 J and is traveling at 10 m/s?

kkurt [141]

Answer:

$\boxed {\boxed {\sf 2.1 \ kilograms}}$

Explanation:

Kinetic energy is the energy an object possesses due to motion. The formula 1/2 the product of mass and the squared velocity.

$E_k=\frac{1}{2} mv^2$

We know the baseball's kinetic energy is 105 Joules. It is also traveling at a velocity of 10 meters per second. `

First, convert the units of Joules to make unit cancellation easier later in the problem. 1 Joule (J) is equal to 1 kilogram square meter per square second (kg*m²/s²). The baseball's kinetic energy of 105 J is equal to 105 kg*m²/s².

Now we know 2 values:

$E_k= 105 \ kg*m^2/s^2$

$v= 10 \ m/s$

Substitute these values into the formula.

$105 \ kg*m^2/s^2= \frac{1}{2} m (10 \ m/s)^2$

Now we need to solve for m, the mass. Solve the exponent.

(10 m/s)²= 10 m/s * 10 m/s = 100 m²/s²

$105 \ kg *m^2/s^2 = \frac{1}{2} m (100 \ m^2/s^2)$

Multiply on the right side.

$105 \ kg *m^2/s^2 = m (\frac{1}{2} * 100 \ m^2/s^2)$

$105 \ kg *m^2/s^2 = m (50 \ m^2/s^2)$

The variable, m, is being multiplied by 50 square meters per square second. The opposite of multiplication is division, so we divide both sides by that value.

$\frac {105 \ kg *m^2/s^2 }{50 \ m^2/s^2}= \frac{ m (50 \ m^2/s^2)}{50 \ m^2/s^2}$

$\frac {105 \ kg *m^2/s^2 }{50 \ m^2/s^2}= m$

The units of square meter per square second will cancel out.

$\frac {105 }{50} \ kg= m$

$2.1 \ kg=m$

The mass of the baseball is 2.1 kilograms.

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3 years ago

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kifflom [539]

Answer:

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4 years ago

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