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Inessa05 [86]
4 years ago
6

How often does the earth revolve around the sun?

Physics
1 answer:
vodka [1.7K]4 years ago
3 0

Ok so basicly the earth goes around the sun every year and vis versa the sun goes aournd the earth every 24 hours.

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Question 3 - If Julia starts out at rest, and in 13 s speeds up to 75 m/s, what is her acceleration?
Hitman42 [59]

Answer:

D

Explanation:

7 0
3 years ago
A type of Lead (Pb) ion has a + 4 oxidation number. Sulfur (S) has a — 2 oxidation number. What would be the chemical formula fo
serious [3.7K]

Answer: The chemical formula for the compound of these two elements is PbS_2

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here metal lead is having an oxidation state of +4 called as Pb^{4+} cation and sulphur non metal has oxidation state of -2 called as S^{2-}. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral PbS_2

The chemical formula for the compound of these two elements is PbS_2

4 0
3 years ago
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Answer:

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6 0
3 years ago
What is the mass of a cannonball if a force of 2,500 N gives the cannonball an acceleration of 200m/s2?
pentagon [3]
Newton's 2nd law of motion:

                         Force = (mass) x (acceleration)

Divide each side
by 'acceleration':      Mass  =  (force) / (acceleration)

                                       =  (2,500 N)  /  (200 m/s²)

                                       =    12.5 kg
8 0
4 years ago
Read 2 more answers
consider a charge of -15.0 mCmoving to the right a 2.00x10^6 m/s in a mganetic field of .0300 T pointing upwards. What is the ma
77julia77 [94]

Answer:

a = 1.13×10^-8 m/s²

Explanation:

f = ma = qvb \\ a =  \frac{qvb}{m}

q = 15×10^-3 C

v = 2×10^6 m/s

B = 0.03 T

m = 8.00 x10^10 kg

a = 900/8 x10^10

a = 1.13×10^-8 m/s²

5 0
3 years ago
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