A fishing boat using sonar to locate fish is employing

Answers

Answer 1

Answer: A fishing boat using sonar to locate fish is employing reflection.

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A metal underground water pipe that is in direct contact with the Earth for ? or more is a code-recognized as a grounding electrode and must be included in the grounding electrode system.

Answers

Answer:

10 feet

Explanation:

In a standard procedure, there should be an approximate value of 10 feet between the water pipe and the Earth. This is to prevent the contamination of water and also the corrosion of the water pipe. Most pipes are made of iron and in the presence of water, there can be a chemical reaction between the iron and water in the presence of oxygen.

Stable system where forces cancel eachother out

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Equilibrium - stable system where forces cancel each other out

A net force of 200 newtons is applied to a wagon for 3 seconds. This cause the wagons to undergo a change in momentum of ?

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physics- damon, Monday, December 1, 2014 at 3:27 pm force =change in momentum\ change in time or m a if m is constant

change in momentum/3=200

change in momentum =3*200 kg m/s

A 45.2-kg wagon is towed up a hill inclined at 18.5∘ with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 191 N in it. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. How fast is the wagon going after moving 83.8 m up the hill?

Answers

Answer:

The speed is 29.9 m/s

Explanation:

The force created from gravity due to the wagon mass is:

$F=m*g*sin(18.5)\nF=45.2*9.8*sin(18.5)\nF=140.55$

140.55 N pull the wagon down. Two parallel rope with tension of 191N creates 382 N on the wagon. Therefore:

$T_(total)=382-140.55=241.45$

241.45 N force is pulling up the wagon. Then we need to find the acceleration of the wagon under this force:

$F=m*a\n241.45=45.2*a\na=5.34$

acceleration is 5.34 m/s^2. The distance is multiplication of acceleration and square of the time.

$x=1/2*a*t^2\n83.8=0.5*5.34*t^2\nt=5.6$

After 5.6 second the wagon will ride 83.8 m up to hill. And the speed of wagon at that point is:

$v=a*t\nv=29.9$

How do I use the equation E=MC^2 in relation to atoms to find the amount of energy of a reaction?

Answers

-- Find the mass of all the pieces before the reaction.

-- Find the mass of all the pieces after the reaction.

-- Find the difference . . . (mass before) minus (mass after)

-- If any mass is missing, either you lost track of it, or else
it was converted to energy.

How much energy ?

(the missing mass) times c² .

A marble statue has a mass of 6,200 grams and a volume of 2,296 cm3. What is the density of marble?

Answers

d= m/v
d= 6200/2296
density = about 2.7

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