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a_sh-v [17]
2 years ago
13

What force is necessary to accelerate a 1,200 kg car at a rate of 35 m/s2?

Chemistry
1 answer:
Zarrin [17]2 years ago
6 0

Explanation:

Given that,

Mass of a car, m = 1200 kg

Acceleration of the car, a = 35 m/s²

The force acting on the car is given by :

F = ma

F = 1200 kg × 35 m/s²

= 42000  N

If the force is 30,600 N, then acecleration is given by :

a=\dfrac{F}{m}\\\\a=\dfrac{30600}{1200}\\\\a=25.5\ m/s^2

Hence, this is the required solution.

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Which of the following is a single replacement reaction?
IrinaK [193]

Answer:

Fe + 3NaBr    →   FeBr₃ + 3Na

Explanation:

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Chemical equation:

Fe + 3NaBr    →   FeBr₃ + 3Na

This chemical equation shows the single replacement reaction. Iron replace the sodium and react with bromine.

All other options are incorrect because,

Ca(OH)₂ + H₂SO₄      →     CaSO₄  + 2H₂O

It is double replacement reaction.

CH₄ + 2O₂     →     CO₂  + 2H₂O

This reaction equation shows combustion.

H₂O + CO₂  →    H₂CO₃

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3 years ago
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How hot, in degrees Celsius, would the air inside the balloon have to get in order for the balloon to lift off the ground? Assum
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Answer:

The temperature in degress Celsius is 52.25°C

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\rho _{t}=\rho _{a}  -0.115=1.2-0.115=1.085kg/m^{3}

The temperature is:

T=\frac{P}{\rho _{t} R} =\frac{1.013x10^{5} }{1.085*287.05} =325.25K=52.25°C

3 0
3 years ago
(15 PTS) What are two parts of the atomic theory of atoms?
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1) All matter is made of atoms. 2) Atoms are indivisible and indestructible.

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How many oxygen atoms are there in 0.25 mole of CO2?
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