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3 years ago

1) Which of the following alternative energy sources is NOT inexhaustible?

Physics

2 answers:

ioda3 years ago

8 0

1 is c...geothermal

2 is d...all of the above

3 is d...the expense of large tracts of land in populated areas

kakasveta [241]3 years ago

7 0

1) I am pretty sure that f the following alternative energy sources which is NOT inexhaustible is D.Wind Energy. I choose this option because this type of energy can not be used completely or in full measure.

2) The problems which are associated with the increased use of nuclear energy are being revealed by all the options attached to this question. As you can see, all the issues connected to increacing of nuclear energy are represented above the question, so the answer is D.
3) One problem with wind energy as a major source of electricity is D. the expense of large tracts of land in populated areas. This is the major drawback of such source of renewable energy.

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valkas [14]

Im pretty sure the answer is c; velocity is usually measure by a vector :)

6 0

3 years ago

Read 2 more answers

What do you mean by average velocity

mina [271]

Answer:

Here is the answer. Hope this helps you!

Explanation:

Average velocity is the sum of initial and final velocity divided by 2. I t is the same as total Displacement divided by total time. Average velocity is calculated when the body is in non-uniform motion (also when total displacement and time is not given). The formula is as follows:

u + v/2 = $v_{av}$

Average velocity = Average speed

during motion in a straight line. therefore, the above mentioned formula can be used for calculating average speed as well, when the direction is one and only the same, that is, during motion in a straight line. The S.I unit remains the same-

m/s.

Since velocity is vector, average VELOCITY is also vector. However, Average SPEED is scalar as speed is scalar. both can be equal only when the distance = displacement and when they are following the same direction of motion.

7 0

3 years ago

A railroad car of 2000 kg coasting at 3.0 m/s overtakes and locks with an identical car coasting on the same track in the same d

serg [7]

The key is in "they lock together". This tells you this is a complete inelastic collision and therefore you can use the formula:
m1*v1+m2*v2=v(m1+m2)
Plug in numbers:
2000*3+2000*2=v(2000+2000)
so v=2 m/s, obviously in the same direction of motion in which they were both moving.

4 0

4 years ago

A car travelling at 5.0 m/s starts to speed up. After 3.0 s its velocity has increased to 11 m/s. a) What is its acceleration? (

lions [1.4K]

initially, the car is traveling at 5.0 m/s.

so, we know acceleration for changing velocity is :

a = (v-v $_{o}$ )/t ..........(i)

where v is the final velocity

v $_{o}$ is the initial velocity

t is the time taken to change velocity

Now, as per the question :

initial velocity, v $_{o}$ =5.0 m/s

final velocity, v =11 m/s

time taken, t = 3 s

putting the values in equation (i),

a = ( 11-5 )/3

a = 2 m/s²

Therefore, a, after 3 s, is 2 m/s².

4 0

1 year ago

An archer shoots an arrow into a target using a bow. If the "action" force is the force of the bowstring against the arrow, what

aliya0001 [1]

Weight of an arrow is 20 plus 3

8 0

3 years ago