What can you predict about an element from its position in the periodic table

Answers

Answer 1
Answer: Based on its position in the periodic table, you can predict how many electrons it has, how many valence electrons, how many levels of electrons, and its atomic number and mass.

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How is sound is different from music how loundness od sound mention some ways to reduce

Answers

not too sure on this one maybe to locate objects under water, to diagnose problems, to treat medical ailments

Calate the force nessacy to accerate a 0.14 kg hardball at a rate of 100 m/s

Answers

Force=mass x acceleration
Force=.14 kg x 100 m/s
Force= 14 Newtons
Hope this helps. 

How do you separate the mixture of rocks and sand

Answers

you shift out the sand
by sifting it so they can be seperate

Determine what forces are present in this situation: An elevator is rising at a constant speed; the elevator is the object in this situation.

Answers

Tension pointing up at the top Weight pointing down at the bottom If there is someone standing inside the elevator, there will be a normal reaction force pointing down at the bottom.

gravity and tension

i took the test

Compare an contrast a cell to a human body

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Cells make up the Tissue, which make up our Organs, which make our Organ Systems, Which make us our bodies. They make us up and are alive. They grow, feed, reproduce, and die. The main difference between our size would be our levels of complexity.
this is the answer
i think so 
does it help?

A 50-kg ice skater is holding a 3-kg ball, moving at a steady +5 m/s. She then throws the ball backwardsat -10 m/s, if so what would her final velocity be?

Answers

Answer: 5.9 m/s

Explanation:

This problem can be solved by the Conservation of Momentum principle, which establishes that the initial momentum p_(o) must be equal to the final momentum p_(f):

p_(o)=p_(f)(1)

Where:

p_(o)=(m_(1)+m_(2))V_(o)(2)

p_(f)=m_(1)U_(f)+m_(2)V_(f)(3)

m_(1)=50 kg is the mass of the skater

m_(2)=3 kg is the mass of the ball

V_(o)=5 m/s is the initial velocity of the skater and the ball

V_(f)=-10 m/s is the final velocity of the ball

U_(f) is the final velocity of the skater

Substituting (2) and (3) in (1):

(m_(1)+m_(2))V_(o)=m_(1)U_(f)+m_(2)V_(f)(4)

Isolating U_(f):

U_(f)=((m_(1)+m_(2))V_(o)-m_(2)V_(f))/(m_(1))(5)

U_(f)=\frac{(50 kg+3 kg)5 m/s}-(3 kg)(-10 m/s)}{50 kg}(6)

Finally:

U_(f)=5.9 m/s