Answer:
Vf = 69.56 cm/s
Explanation:
In order to find the final speed of the ramp, we will use the equations of motion. First we use second equation of motion to find out the acceleration of marble:
s = Vi t + (1/2)at²
where,
s = distance traveled = 160 cm
Vi = Initial Speed = 0 cm/s (since, marble starts from rest)
t = time interval = 4.6 s
a = acceleration = ?
Therefore,
160 cm = (0 cm/s)(4.6 s) + (1/2)(a)(4.6 s)²
a = (320 cm)/(4.6 s)²
a = 15.12 cm/s²
Now, we use first equation of motion:
Vf = Vi + at
Vf = 0 cm/s + (15.12 cm/s²)(4.6 s)
<u>Vf = 69.56 cm/s</u>
Answer:
Explanation:
force = f, mass = m, acceleration = a
f = m a
m = 200 kg
f = 800 N
f = m a
800 = 200a
a = 800 / 200
<u><em>a = 4</em></u>
Hope this helps
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No
Explanation:
Tap water will not boil and freeze at those exact temperature which are the boiling and freezing points.
O°C and 100°C are the boiling points of pure water.
Pure water is a pure substance with a definite composition made up of 2 atoms of hydrogen and 1 atom of oxygen.
Pure water boils at 100°C and freezes at O°C ,
- Tap water is not pure water.
- It has some impurities in it which causes causes the elevation of the boiling point of liquids and widening of the boiling range.
- Tap water is treated water that contains some other dissolved chemicals.
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Molecular formula brainly.com/question/4574324
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1 kg = 1000 gr
6.4 kg = 6400 gr
Answer:
measurement of force amplification
