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Black_prince [1.1K]
2 years ago
8

Images help to convey information that might sometimes be very complex if explained in words. Images also simplify certain expla

nations. List two to three picture resources that you wish to use in your paper. Write one to two sentences explaining what the image shows and where you obtained it.
Physics
1 answer:
alexgriva [62]2 years ago
7 0

Answer:

i dont know why

Explanation:help please k

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A child with a weight of 230 N swings on a playground swing attached to 1.90 m long chains. What is the gravitational potential
nlexa [21]

Answer:

437 J

Explanation:

Parameters given:

Weight of child, W = 230 N

Height of swing, h = 1.9 m

Gravitational Potential Energy is given as:

P. E. = m*g*h = W*h

m = mass

h = height above the ground

W = weight

P. E. = 230 * 1.9

P. E. = 437 J

7 0
3 years ago
Read 2 more answers
For horizontally-launched projectiles, which of the following describes acceleration in both directions with a = 0 and a = -9.8m
natulia [17]

Answer:

4 is the best option for it as there are some stuff in grade to ye

5 0
3 years ago
An object moving 20 m/s
yan [13]

Answer:

<u>We are given:</u>

initial velocity (u) = 20m/s

acceleration (a) = 4 m/s²

time (t) = 8 seconds

displacement (s) = s m

<u />

<u>Solving for Displacement:</u>

From the seconds equation of motion:

s = ut + 1/2 * at²

replacing the variables

s = 20(8) + 1/2 * (4)*(8)*(8)

s = 160 + 128

s = 288 m

7 0
3 years ago
The substances referenced in the table are being considered for use in cooking materials. Since the materials must be melted dur
frutty [35]

Brass requires more energy than silver

Aluminum requires more energy than copper

Aluminum requires more energy than brass

Explanation:

The specific heat capacity of a substance indicates the amount of heat energy required to raise 1 kg of that substance by 1 degree in temperature.

Mathematically:

C=\frac{Q}{m\Delta T}

where

Q is the heat supplied to the substance

m is the mass of the substance

\Delta T is the change in temperature

Therefore, the higher the specific heat capacity of a substance, the more energy is needed to increase its temperature.

Here we can compare the specific heat capacity of the materials mentioned:

Silver: C=0.233 J/gK

Brass: C=0.380 J/gK

Platinum: C=0.130 J/gK

Aluminium: C=0.910 J/gK

Copper: C=0.390 J/gK

Therefore, the correct statements are:

Brass requires more energy than silver

Aluminum requires more energy than copper

Aluminum requires more energy than brass

Learn more about specific heat:

brainly.com/question/3032746

brainly.com/question/4759369

#LearnwithBrainly

3 0
3 years ago
True or false elliptical galaxies are made up of old stars containing small amount of gas
ch4aika [34]
True, They contain old stars and posses little gas or dust
6 0
3 years ago
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