1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kifflom [539]
3 years ago
7

Which of the following is a nonrenewable resource? a. hydropower b. biomass c. geothermal power d. coal

Physics
2 answers:
Lesechka [4]3 years ago
7 0
The correct answer is D. Coal

It is non renewable because it will not come into existence on its own if we don't mine it. Other resources will replenish over time.
garik1379 [7]3 years ago
5 0
A).  Hydropower is continually replenished by the sun.

b).  Biomass is replenished when things die, which they keep on doing.

c).  Coal is replenished, but you need dead large animals and millions of years.
      On the scale of human lifetimes, coal is not renewable. 
You might be interested in
What is the force of gravity between you and a standard tennis ball if you are 1 meter away
faltersainse [42]

Answer:

WHY MUST I CRYYYYYYYY

Explanation:

3 0
2 years ago
Stephanie lives in California,and her cousin Thomas lives in France. which coordinate system would be most useful if the two wan
qwelly [4]

Answer:

Equatorial

Explanation:

Your welcomee

8 0
3 years ago
You and a friend each carry a 15 kg suitcase up two flights of stairs, walking at a constant speed. Take each suitcase to be the
AlekseyPX

Answer:

Both of you did the same work but you expended more power.

Explanation:              

<em>Work done</em> by an object is calculated by force applied multiplied by the distance.

  W=F*d

From the figure given below let us calculate force applied bith you and yopur friend.

Let us take the stairs in positive x direction,

Work done by you W₁ ,

The force applied Fₓ = F - mgsinθ =maₓ

here aₓ = 0, because both of you move with constant speed

F - mgsinθ = 0

F=  mgsinθ

The work done by you on the suitcase is

W = F L cos0°  ,    where L is he length of the staircase.

W = FL = mgsinθL ,  by substituting value of F

Work done by you is W₁ = mgLsinθ

Similarly work done by your friend is W₂ = mgLsinθ.

Because both of you carry suitcase of same weight and in staircase is in same angle the force applied is same .

Therefore <em>work done by both of you is same</em> . Both of you did equal work.

The power , is defined as amount of energy converted or transfered per second or rate at which work is done .

P =\frac{W}{t} =\frac{FL}{t}

Power spend by you P₁ = mgLsinθ/t

P₁ = 15*9.8*Lsinθ/30

P₁ = 4.9L sinθ  eqn 1

Power spend by your friend is P₂ = mgLsinθ/t

P₂ =15*9.8*Lsinθ/60

P₂ = 2.45Lsinθ    eqn 2

Dividing eqn 1 and eqn 2

P₁ = 2P₂

You have spend more power than your friend .

Hence Both of you did equal work but you spend more power.

7 0
3 years ago
HELP PLEASE
4vir4ik [10]

Recall this kinematic equation:

a = \frac{Vi+Vf}{Δt}

This equation gives the acceleration of the object assuming it IS constant (the velocity changes at a uniform rate).

a is the acceleration.

Vi is the initial velocity.

Vf is the final velocity.

Δt is the amount of elapsed time.


Given values:

Vi = 0 m/s (the car starts at rest).

Vf = 25 m/s.

Δt = 10 s


Substitute the terms in the equation with the given values and solve for a:

a = \frac{0+25}{10}

<h3>a = 2.5 m/s²</h3>
7 0
3 years ago
Read 2 more answers
Equation InterpretationTwo Pizza Rolls are on the rotating carousel of a microwave oven. One is at the rim (edge) and the other
svetoff [14.1K]

Answer:

Explanation:

Both the pizza rolls are on two circular paths having different radii because one of them is on the rim and another is near the central axis. Their angular velocity are equal . That means they rotate by same angle in equal period of time. So in Δt they make equal angles at the centre. Hence their angular displacements are equal.

But length of arc made by them in equal interval of time that is Δt are different. Ir is so because their speed are different . Speed v and angular speed ω are related to each other as follows.

v = ω r .

So for objects in motion on circular paths having different radii , v are different even if their ω are same.

length of arc l = v Δt

So length of arc will be proportional to their v which will be proportional to r if their ω are same .

Hence length of arc will be proportional to radius of circular path,  ie their distance from the centre .

5 0
3 years ago
Other questions:
  • Why should you explore the potential roadblocks to your chosen career?
    13·1 answer
  • An atom’s mass number equals the number of
    15·2 answers
  • If air resistance in neglected, show (algebraically) that a ball thrown vertically upwards with a speed of Vo will have the same
    5·2 answers
  • A train has a constant velocity of 2 m/s east. What is the magnitude of the horizontal acceleration of the train?
    11·1 answer
  • The properties of some rare earth elements make them essential ingredients in electronics. Rare earth elements appear together i
    14·2 answers
  • Need help with this please
    11·2 answers
  • Based on the diagram of a ball rolling down hill, what statement is true? A) The ball in box C has less kinetic energy than the
    6·1 answer
  • what are some challenges of scuba diving and how do pressure variations in depth affect our ability to explore the ocean?
    9·1 answer
  • A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 33 N. Starting from rest, the sle
    14·1 answer
  • Two polarizing sheets have their transmission axes crossed so that no light is transmitted. A third sheet is inserted so that it
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!