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Romashka-Z-Leto [24]
3 years ago
6

If a freely falling rock were equipped with a speedometer, by how much would itd speed readings increase with each second if it

were on a planet wreg=20m/s2?
Physics
1 answer:
Len [333]3 years ago
3 0

" 20 m/s² " means that if gravity is the ONLY force on the object
(the object is in 'free fall'), then its speed increases by  20 m/s
every second.

That's the answer to your question.  Now, let me ask you
another one:

How does a speedometer tied to a falling rock work ?
How can it measure the rock's speed ?

Maybe one way would be to have a little tiny propeller on
the front of the speedometer, and it could measure how fast
the propeller is spinning as the rock falls through the air ?
Great idea.  But we already said the rock is in free-fall,
so there's no air resistance, we can't have any air, and
there's nothing to spin the propeller.

How would you do it ?  How can you measure the rock's speed ?

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A net force of 60 N north acts on an object with a mass of 30 kg. Use Newton's second law of motion to calculate the amount of a
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<h3 /><h3>Answers :</h3><h3 />

F = m×a

60 N = 30 kg × a

30 × a = 60

a =  60/30

a =  2 m/s²

<h3 /><h3 />

<em>The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. </em>

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Explanation:

If the net force increases while the mass of the object remains the same, the amount of acceleration also increases.

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3 years ago
True or false question scientists can predict when an earthquake will occur
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Answer:

False

Explanation:

Neither the USGS nor any other scientists have ever predicted a major earthquake. USGS scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.

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The answer is c replication
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Given 4.8 moles of a gas at 37 degrees Celsius and at 792 torr, what is the volume of the gas? (The ideal gas constant is 0.0821
Anastaziya [24]

Answer:

1.17 x 10^2 L

Explanation:

We can find the volume of the gas by using the ideal gas law:

pV=nRT

where we have:

p=792 Torr \cdot \frac{1 atm}{760 Torr} = 1.04 atm is the pressure

V is the volume

n = 4.8 mol is the number of moles

R = 0.0821 L · atm/mol · K is the ideal gas constant

T=37^{\circ}+273 =310 K is the temperature

Solving the equation for V, we find the volume

V=\frac{nRT}{p}=\frac{(4.8 mol)(0.0821 L atm/mol K)(310 K)}{1.04 atm}=117.5 L = 1.17\cdot 10^2 L

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