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Gala2k [10]
3 years ago
15

All examples involve chemical energy except __________. A. working muscles using food. B. burning a candle. C. coasting downhill

on a bike
Physics
2 answers:
navik [9.2K]3 years ago
7 0
The one that does not involve chemical energy would be : C. Coasting downhill on a bike
This one requires physical energy, To be categorized as chemical energy, the bond of chemical compounds has to be released

Hope this helps
kompoz [17]3 years ago
7 0

Answer:

Coasting downhill on a bike

Explanation:

The example that involves chemical energy are working muscles using food and burning a candle. In both of these processes many biochemical processes are involved i.e. mobilization of energy from glucose stores etc.

Coasting downhill on a bike does not involve any chemical energy. There exists an energy change i.e. potential energy is converting to kinetic energy.

Hence, the correct option is (c) "coasting downhill on a bike".

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What keeps the balanced rock balanced
pogonyaev
Hello,

Here is your answer: 

The proper answer to this question is "because of there substantial size the rock rests on another rock which keeps it balanced".

If you need anymore help feel free to ask me!

Hope this helps!
5 0
3 years ago
A sled that has a mass of 8 kg is pulled at a 50 degree angle with a force of 20 N. The force of friction acting on the sled is
vitfil [10]

The acceleration of the sled will be 1.30 m/s². Force is defined as the product of mass and acceleration.

<h3>What is force?</h3>

Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body.

Given data;

m(mass of sled)=8 kg

Θ is the inclination of force= 50°

Force of friction,f=2.4 N.

The applied force at the given angle is resolved into the two-component as;

\rm F_h=F cos \theta \\\\ F_h= 20 cos 50 ^0 \\\\ F_h= 12.85 \ N

\rm F_v=F sin \theta \\\\  F_v=20 sin 50^0 \\\\   F_v=15.32 \ N

The net vertical force is zero;

\rm F_N=mg-Fsin50^0 \\\\ \rm F_N=8 \times 9.81 -15.32 \\\\ F_N=63.1 \ N \\\\

From Newton's second law the net force as;

\rm \sum F_{net}=ma \\\\ Fcos 60^0-f =ma \\\\ a=\frac{12.855-2.4}{8} \\\\a = 1.30 \ m/s^2

Hence, the acceleration of the sled will be 1.30 m/s².

To learn more about the force refer to the link;

brainly.com/question/26115859

#SPJ1

5 0
2 years ago
Read 2 more answers
F-40N<br>m=5k<br>k = 0,2<br>a=? <br><br><br>​
tester [92]

Answer:

1......... .......... ......

3 0
3 years ago
One way in which the atmosphere helps us is by absorbing solar _____?
Damm [24]
The atmosphere absorbs most of the solar RADIATION in the atmosphere, but not all which is how we still get sun burns. :)
8 0
3 years ago
Light from a distant star is collected by a concave mirror that has a radius of curvature of 150 cm. How far from the mirror is
andrey2020 [161]
The focal point of a mirror is half of the radius of curvature. We can use the formula,                                                                                                                   1/f = 1/v + 1/u                                                                                                          where f is the focal length , v is the image distance and u is object distance        The distance of the star is assumed to be incredibly far away and 1 divided by a really big number is approximately zero, thus;                                                     1/f = 1/v  = 1/75 = 1/v                                                                                             therefore; the image is formed 75 cm infront of the mirror
4 0
4 years ago
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