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SIZIF [17.4K]
3 years ago
10

A freight train rolls along a track with considerable momentum. If it rolls at the same speed but hastwice as much mass, its mom

entum isa. zero.b. doubled.c. quadrupled.d. unchanged.
Physics
1 answer:
Margaret [11]3 years ago
8 0

Its Momentum Would Be Doubled

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If you know that the universe is estimated to be 14 billion years old . what is the age of the universe in seconds ???? (knowing
Svetlanka [38]

Answer:

<em>The estimated age of the universe is</em> 4.42*10^{17}\ seconds

Explanation:

<u>Time Units Conversion</u>

Sometimes we need to express magnitudes in different units, depending on the specific situation handled in the question or problem at hand. Magnitudes like length, time, mass, temperature, pressure, etc., can be expressed in several different units.

The most common units for time are years, months, days, hours, minutes, and seconds. There are 3,600 seconds in one hour and 24 hours in one day.

We are given the estimated age of the universe as 14 billion solar years. If one solar year is 365.25 days long, then the age, expressed in days is

14,000,000,000 * 365.25 days

Some quantities need to be expressed in scientific notation. This is the case since the numbers are too high

14,000,000,000 * 365.25 = 5.1135*10^{12}\ days

There are 24*3600=86400 seconds in one day, so

5.1135*10^{12}\ days=5.1135*10^{12} * 86400 =4.42*10^{17}\ seconds

The estimated age of the universe is 4.42*10^{17}\ seconds

6 0
3 years ago
Read 2 more answers
The planet's hawks and block their near each other in the door again system the dworkin's have very advanced technology and a do
Virty [35]

Answer: A,B, and E

Explanation: Just checked I got them right:)

4 0
3 years ago
Which circuit would have the most electrical power?
aliya0001 [1]

the answer is c because it has the most volts

a

6 0
2 years ago
Who was the man who lived from 460B.C. 370B.C. and was among the first to suggest the idea of atoms?
Jlenok [28]
C Democritus

That's the Answer
6 0
3 years ago
Read 2 more answers
A 0.12 kg body undergoes simple harmonic motion of amplitude 8.5 cm and period 0.20 s. (a) What is themagnitude of the maximum f
Neporo4naja [7]

Answer:

a)F=698.83 N

b)K=8221.56 N/m

Explanation:

Given that

mass ,m = 0.12 kg

Amplitude ,A= 8.5 cm

time period ,T = 0.2 s

We know that

T=\dfrac{2\pi}{\omega}

{\omega}=\dfrac{2\pi }{0.2}\ rad/s

{\omega}=31.41\ rad/s

We know that

{\omega}^2=m\ K

K=Spring constant

K=\dfrac{\omega^2}{m}

K=\dfrac{31.41^2}{0.12}\ N/m

K=8221.56 N/m

The maximum force F

F= K A

F= 8221.56 x 0.085 N

F=698.83 N

a)F=698.83 N

b)K=8221.56 N/m

3 0
3 years ago
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