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jeka94
3 years ago
8

How many electrons are in an element with an atomic number of 20 and an atomic mass of 40? options: ANSWER FOR BRAINLIES

Physics
2 answers:
NeX [460]3 years ago
6 0
Answer: B
Step by step explanation:

subtract mass number and atomic number

40-20= 20


mafiozo [28]3 years ago
4 0

Answer:

B

Explanation:

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6 one-sixth parts are needed to make a whole.
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Which Phrase describes velocity?
Sav [38]

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C. a quantity with magnitude and direction

Explanation:

These are the options for the question

A. a quantity of magnitude only

B. a quantity with direction only

C. a quantity with magnitude and direction

D. a quantity with no units.

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3 years ago
It is 5.0 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h
Ostrovityanka [42]

Answer:

Walking burns up more energy,1740000J

Explanation:

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Energy consumption for running is calculated as:

700watts=700j/s,d=5000m,v=\frac{25}{9}m/s\\\\\therefore E_c=\frac{d}{v}\times Energy \ usage\\\\=\frac{5000}{\frac{25}{9}}\times 700j/s\\\\=1260000J

Energy consumption for walking is calculated as:

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Walking is a slower process hence the need for more energy over longer periods  raltive to running the same distance.

Hence walking burns more energy; 1,740,000J. It burns more because you walk for a greater period of time.

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2 years ago
13.If a jet plane with a velocity of 20 m/s at t = 0 accelerates at a rate of 40 m/s²
OverLord2011 [107]

Answer:

140m/s

Explanation:

V=V0+at. V=20+40*3=140m/s

5 0
2 years ago
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