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Alexeev081 [22]
4 years ago
8

I can't find this answer anywhere, so I'll ask here: what item did they base the SI unit of mass (grams) off of? (in other words

, to what object did they say "hey, lets make this equal 1 gram and then go from there"
Physics
1 answer:
nevsk [136]4 years ago
3 0
The SI Unit of the gram was based off the weight of a 1 cm cube of water that was at a temperature of 4 degrees Celsius.
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What is the magnitude of force required to accelerate a car of mass 1.7 * 10 ^ 3 kg by 4.75 m/s
Gnesinka [82]

What is the magnitude of force required to accelerate a car of mass 1.7 × 10³ kg by 4.75 m/s²

Answer:

F = 8.075 N

Explanation:

Formula for force is;

F = ma

Where;

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a is acceleration

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8 0
3 years ago
a metal sphere with a mass of 90 kg rolls along at 16m/s and strikes a stationary sphere having a mass of 140kg. the first spher
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Calculate the minimum thickness (in nm) of an oil slick on water that appears blue when illuminated by white light perpendicular
mr_godi [17]

Answer:

The minimum thickness = 83.92 nm

Explanation:

The relation between the wavelength in a particular medium and refractive index \lambda_n = \frac{ \lambda }{n}

where ;

\lambda = wavelength of the light in vacuum

n = refractive index of medium with respect to vacuum

For one phase change :

2t = \frac{\lambda_n}{2}\\\\where \ \lambda_n = \frac{\lambda}{n}\\\\Then \ \\\\2t = \frac{\lambda}{2n}\\\\t = \frac{\lambda_n}{4n}

Replacing 1.43 for n and 480 nm for λ; we have:

t = \frac{480}{4(1.43)}

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Thus; the minimum thickness = 83.92 nm

4 0
3 years ago
• Describe the main ideas of physical science
arlik [135]
Branch of science that studies matter and its motion through space and time, along with related concepts such as energy and force. Describing the nature, measuring and quantifying of bodies and their motion, and dynamics.
5 0
4 years ago
Does an increase in velocity necessarily mean an increase in acceleration?
Vinil7 [7]
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Here, if velocity is increasing, then, 
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In short, Your Answer would be "Yes"

Hope this helps!
3 0
3 years ago
Read 2 more answers
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