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grandymaker [24]
3 years ago
9

When a constant force acts upon an object, the acceleration of the object varies inversely with its mass. When a certain constan

t force acts upon an object with mass 8 kg, the acceleration of the object is 7 /ms2. If the same force acts upon another object whose mass is 28 kg, what is this object's acceleration?
Physics
1 answer:
AVprozaik [17]3 years ago
5 0

Answer: The acceleration of 28 Kg object will be 2 m/s^{2}

Explanation: Force acting on an object is defined as mass times acceleration acting on it.

Mathematically it is defined as:

Force = mass \times acceleration

F = 8 \times 7 = 56 N

If the same force is acting on a 28 Kg object then the acceleration of the object will be equals to force to mass ratio.

Acceleration = \frac{Force}{Mass}  = \frac{56}{28} = 2 m/s^{2}

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A current of 0.96 amps flows through a copper wire 0.44 mm in diameter when connected to a potential difference of 15 v. how lon
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By using Ohm's law, we can calculate the resistance of the wire. Ohm's law states that:
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R= \frac{\rho L}{A} (1)
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3 years ago
A unit of time sometimes used in microscopic physics is the "shake". One shake equals 10−8 s.
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Answer:

(a) There are 3.17 times more shakes in a second than seconds in a year.

(b) Humans have existed for 9067.72 universe seconds.

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(a) First we calcule how many seconds are in a year. One year have 365 days, one day has 24 hours, one hour has 60 minutes and one minute has 60 seconds, so:

60s*60*24*365=3.1536*10^7s

Now, we calculate how many shakes are in a second:

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Finally, we calculate how many more shakes in a second are there than seconds in a year:

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(b) Using a simple rule of three we can calculate  how many "universe seconds" have humans existed, recall that 1 day has 86400 seconds:

1010 years--------->86400s

106 years----------> x seconds

x=\frac{106y*86400s}{1010y}=9067.72s

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