Calculate earth's average speed relative to the sun.

Average speed of the earth relative to the sun = 30045.17 m/s

Explanation:

To calculate the average speed of the earth relative to the sun, we would have to divide the distance traveled from earth to sun by the time of travel. Thus;

Average speed of the earth = Distance travelled from earth to sun/total time of travel.

Now, formula for distance traveled by earth = 2πr

Where r is the average distance from the Earth to the sun and is given by 1.508 × 10^(11) m

Thus;

distance traveled by earth = 2π × 1.508 × 10^(11) = 947504344322.6816 m

Total time is time taken for the earth to complete a revolution around the sun. Time = 365 days

Converting this to seconds gives;

Since 24 hours make a day, we have;

365 × 24 × 60 × 60 = 3.1536 × 10^(7) s

Thus;

Average speed of the earth = 947504344322.6816/(3.1536 × 10^(7)) = 30045.17 m/s

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true