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3 years ago

Natural resources do not come from outside the Earth's system. O True O False

Chemistry

2 answers:

Natalija [7]3 years ago

4 0

The answer is : False

Ne4ueva [31]3 years ago

3 0

True. they would have to be naturally occurring in the earth’s system.

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Which has more kenetic energy: A 150 g bullet fired from a gun achieving a velocity of 440 m/s and a standard baseball weighing

aleksley [76]

Answer:

Bullet has more kinetic energy then baseball.

Explanation:

Mass of the bullet , m = 150 g = 0.150 kg

Velocity of the bullet = v = 440 m/s

Kinetic energy = $\frac{1}{2}\times mass\times (velocity)^2$

Kinetic energy of the bullet = K.E

$K.E=\frac{1}{2}mv^2=\frac{1}{2}\times 0.150 kg\times (440 m/s)^2$

$=14,520 Joules$

Mass of the baseball, m' = $\frac{51}{4} oz$ = 0.36146 kg

(1 ounce = 0.0283495 kg)

Velocity of the baseball= v' = 105.1 mph

1 mile = 1609.34 m

1 hour = 3600 seconds

$v'=\frac{ 105.1\times 1609.34 m}{3600 s}=46.98 m/s$

Kinetic energy of the baseball = K.E'

$K.E'=\frac{1}{2}m'v'^2=\frac{1}{2}\times 0.36146 kg\times (46.98 m/s)^2$

$=398.83 Joules$

14,520 Joules > 398.83 Joules

K.E > K.E'

Bullet has more kinetic energy then baseball.

7 0

4 years ago

Please help

Jet001 [13]

Answer:

they are tinyb particles

Explanation:

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3 years ago

If 4 miles of sodium react, how many moles of chlorine gas will react? 2Na + Cl2 ---> 2NaCl

larisa [96]

2 mole Na needs 1 mole Cl2
4 mole Na = 2 mole Cl2

8 0

3 years ago

What is kinetic energy

il63 [147K]

Answer:

kinetic energy is the energy of movement

Explanation:

please mark brainliest just need 4 more

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3 years ago

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What is a decay series?

Ulleksa [173]

Answer:

a chain of decays that result in a stable nucleus

Explanation:

Decay series is a series of decay in which radioactive element is decomposed in different elements until it produces one stable atom.

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3 years ago

Read 2 more answers