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Ronch [10]
3 years ago
11

True or false electrons are a lot lower in mass than protons

Physics
2 answers:
Romashka [77]3 years ago
6 0
True, electrons are a lot lower in mass than protons.
slavikrds [6]3 years ago
4 0
True. The mass of an electron is about 1/2000 amu whereas the mass of a proton is 1 amu.
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If a freely falling rock were equipped with a speedometer, by how much would itd speed readings increase with each second if it
Len [333]

" 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 ?

3 0
3 years ago
Why the formation of sand is a physical change.
Neko [114]
This is a physical change because there isn’t a change in composition of the substance, sand. It is only changing the shape, not having a chemical reaction of any sort.
I hope this helps!
7 0
3 years ago
Need help on all three pizza?
ahrayia [7]
1. 12m/s and here’s how. The equation for calculating velocity of a wave is lambda x frequency. So 2m x 6Hz. Hz can be 1/s so the only unit of measurement we get is meters and seconds. So the answer will be 12m/s.

2. Frequency=2Hz period= 0.5 seconds
Equation for frequency is velocity/wavelength. 10m/s divides by 5m = 2Hz.
Equation for period is 1 / frequency. 1 divided by 2 = 0.5 seconds

3. The answer is the picture of you can’t read my hand writing comment and say “ I need the info about the wave because I can’t read your hand writing “ thank you and I hoped I helped

7 0
3 years ago
Why does increasing the number trials increase confidence in the results of the experiment?
IceJOKER [234]
If you increase the number of trials in an experiment it will make the test more valid and legitimate.As you take the same test/experiment once or twice you could see if your results are similar to each other.

6 0
2 years ago
Read 2 more answers
Find the work needed to lift a 20-N book 2 m.
Ulleksa [173]
This question is written wrong, I think u meant 20 kg?
7 0
3 years ago
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