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3 years ago

Please help with the question I really need help

Physics

1 answer:

Likurg_2 [28]3 years ago

5 0

The correct option is this: BAR GRAPHS SHOW DATA INVOLVED IN DISTINCT CATEGORIES THAT DO NOT OVERLAP WHEREAS PIE CHART SHOWS DATA AS PARTS OUT OF A WHOLE. The correct option is C.
Bar graphs are used to show comparison between different categories of data that are independent of one another.
Pie chart is used to show proportion or percentage of a data out of a whole.

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NEED HELP!!!!!!!!!!!!!

raketka [301]

it would be 'B' because it speeds up reactions

7 0

3 years ago

Rank the nonmetals in each set from most reactive (1) to least reactive (3). Bromine: Chlorine: Iodine:

ANEK [815]

The most reactive element of this list is Chlorine, the next most reactive is bromine, and the least reactive is iodine.

All of these three elements are group 7 elements in the periodic table. It is known that the reactivity of group 7 elements decreases down the group. The most reactive element in this group is Flourine with reactivity decreasing down the group.

The reason for this decrease in reactivity is that as you go down the group, the distance between the positive nucleus that attracts valence electrons increases, decreasing the electrostatic attraction between the nucleus and the outer electrons. The other reason is that the electrons in lower energy levels closer to the nucleus repel and shield the electrons in the outermost shell or energy level of the atom.

Chlorine>Bromine>Iodine.

6 0

4 years ago

Read 2 more answers

A projectile is launched at ground level with an initial speed of 50.0m/s at an angle of 30° above the horizontal. It strikes a

tino4ka555 [31]

Answer:

x = 129.9 m

y = 30.9 m

Explanation:

When an object is thrown into the air under the effect of the gravitational force, the movement of the projectile is observed. Then it can be considered as two separate motions, horizontal motion and vertical motion. Both motions are different, so that they can be handled independently.

Given data:

$v_{i}$ = 50 m/s

Angle = 30°

Time = t = 3 s

horizontal component of velocity = $v_{i_{x}}$ = $v_{i}$ cos30°

$v_{i_{x}}$ = 50cos30°

$v_{i_{x}}$ = 43.3 m/s

Vertical component of velocity = $v_{i_{y}}$ = $v_{i}$ Sin30°

$v_{i_{y}}$ = 50Sin30°

$v_{i_{y}}$ = 25 m/s

This is a projectile motion, and we know that in projectile motion the horizontal component of the velocity remain constant throughout his motion. So there is no acceleration along horizontal path.

But the vertical component of velocity varies with time and there is an acceleration along vertical direction which is equal to gravitational acceleration g.

Horizontal distance = x = $v_{i_{x}}$ t

x = 43.3*3

x = 129.9 m

Vertical Distance = y = $v_{i_{y}}$ t -0.5gt²

y = 25*3 - 0.5*9.8*3²

y = 75 - 44.1

y = 30.9 m

3 0

4 years ago

_______ is energy that is transferred due to a difference in temperatures.

SVEN [57.7K]

Answer:

C. Heat

Explanation:

HEAT is energy that is transferred due to a difference in temperatures.

I hope it helps! Have a great day!

6 0

2 years ago

Calculate the power of a crane if it lifts a load of 2400N through a height of 10m in 15 seconds.Also express the power in horse

dem82 [27]

Answer:

Explanation:

The power of the crane can be found by using the formula

$p = \frac{f \times d}{t} \\$

f is the Force

d is the distance

t is the time taken

From the question we have

$p = \frac{2400 \times 10}{15} = \frac{24000}{15} \\$

We have

power = 1600 W

But 1 W = 0.0013 hp

So 1600 = 2.08 hp

We have the final answer as

Hope this helps you

3 0

4 years ago