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monitta
4 years ago
12

Lighting a fire with a match uses which kinds of energy?

Physics
1 answer:
Maksim231197 [3]4 years ago
4 0
<span>It uses chemical and kinetic energy</span>
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Sounds are produced by objects that are______
ahrayia [7]

Answer: Vibrating

Explanation:

Sound is produced when an object vibrates. The sound vibrations cause waves of pressure that travel through a medium, such as air, water, wood or metal. Sound is a form of mechanical energy.

7 0
3 years ago
Suppose your grocery cart is moving at a constant momentum in a straight line down the aisle of a store, without friction. How w
Strike441 [17]

Answer:

It will increase

Explanation:

The kinetic energy is the energy possessed by a moving object and is given by:

KE = 1/2 mv^2

where m = mass of the object and v = velocity of the object.

It does means that the more the mass of an object in motion, the more the kinetic energy of the object if there are no opposing force such as friction. Also, the more the kinetic energy of the object, the more the speed of that object.

<em>Hence, as the weight of the cart increases by addition of groceries, the kinetic energy increases and the speed also increases as it moves along the frictionless surface.</em>

7 0
4 years ago
a turtle swimming in a straight line toward shore has a speed of 0.50 m/s after 4.0s its speed is 0.80 m/s what is the turtle's
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5 0
4 years ago
Calculate the magnitude and the direction of the resultant forces​
snow_tiger [21]

answer:

resultant = 127.65 in the positive direction

explanation:

F1 = 50N , F2 = 40N, f3 = 55N , f4 = 60N

Fy = 50 sin 50 = 50 × -0.26 = -13

Fx = 40 cos 0 = 40×1 = 40

fx = 55 cos 25 = 55×0.99 = 54.45

Fy = 60 sin 70 = 60 × 0.77 = 46.2

resultant = -13+40+54.45+46.2 = 127.65 in the positive direction

6 0
3 years ago
when a flat mirror forms an image, how does the angle of light rays that reaches your eyes compare to the angle of the rays stri
zepelin [54]

Answer:

They reflect at the same angle at which they approached.

Explanation:

                                                                                                                                                                                     

7 0
3 years ago
Read 2 more answers
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