Easy Question! Chemistry - Please help! I give thanks - It's the picture! - Question 3

Answers

Answer 1

Answer: The leaning tower of pisa is cylindrical and as such the volume can be approximated using the same formula as a regular cylinder.

Volume of a cylinder (V) = $\pi r^(2)h$

Assume $\pi$ = $(22)/(7)$
V = 9891 $m^(3)$
h = 56 m

Let: Radius= r
Diameter= D
Then D= 2r

By substituting the known values into the equation and transposing one can formulate an equation to solve for D.
V = $\pi r^(2)h$
: . 9891 $m^(3)$ = $(22)/(7) * r^(2) * (56m)$

Making r the subject of this equation:
$r^(2) = (V)/(( \pi ) (h))$
$r = \sqrt{ (V)/( ( \pi ) (h)) }$

Since the Diameter is 2r then multiply both sides of the equation by 2
: . $2r = 2 (\sqrt{ (V)/(( \pi ) (h)) } )$
thus   D =   $</span>2 (\sqrt{ (V)/(( \pi ) (h)) } )$

Part B:

Since the formula for Diameter has be formulated, substitute the values of the variables and solve for D
D = $2( \sqrt{ (9891 m^(3) )/( ((22)/(7)) (56m) )$
: . D = $2( \sqrt{56.199 m^(2) })$
  = 2 * 7.497m
= 14.993 m

Part C:
Therefore it can be concluded that the Diameter of the base of the Leaning Tower of Pisa is approximately 14.99 meters.

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A rigid canister holds 50.0 L of helium gas at 32.0°C and 49.9 kPa. The gas is cooled until the pressure reaches 14.2 kPa. What is the Kelvin temperature of the helium?

Answers

Answer:-

86.794 K

Explanation:-

Initial temperature T 1 = 32 C + 273 = 305 K

Initial Pressure P 1 = 49.9 KPa

New Pressure P 2 = 14.2 KPa

The Volume remains same since it is rigid.

∴V 1 = V 2 = 50.0 L

Using the relation

P 1 V 1 / T1 = P 2 V 2 / T 2

New temperature T 2 = P 2 V 2 T 1 / ( P 1 V 1)

= 14.2 KPa x 50.0 L x 305 K / ( 49.9 KPa x 50.0 L)

= 86.794 K

Three quarters of the elements are

Answers

Answer:

Metals

Explanation:

When two or more substances combine, but each keeps its own properties, what is the new combination called A) Element B) Mixture C) Compound D) Homogeneous substance

Answers

hi.
your answer is b.
hope this helps!!!

A 2-kg bowling ball is 2.5 meters off the ground on a post when it falls. Just before it reaches the ground, it is traveling 7 m/s. Assuming that there is no air resistance, which statement is true?The initial potential energy is less than the final kinetic energy.

The intial potential energy is greater than the final kinetic energy.

The mechanical energy is conserved.

The mechanical energy is not conserved.

Answers

Answer: The correct answer is option "The mechanical energy is conserved".

Explanation:

Mechanical energy = Kinetic energy + Potential Energy

Mechanical energy of the body is defined a sum of potential energy and kinetic energy possessed by the body in motion. It is the energy associated with position and motion of the body.

The principle of Conservation of Mechanical Energy states that the mechanical energy of the body remains constant as long as the forces acting on the body are conservative forces.

From, this we can say that mechanical energy of the bowling ball with mass of 2 kg falling at speed of 4.4 m/s will remain conserved.

Hence,the correct answer is "The mechanical energy is conserved".

The answer to your question would be The mechanical energy is conserved. I just took the test and it was right.

What is found in every organ

Answers

Blood can be found in every organ.

Hope IT helped :D

cells can be found in every organ

this applies to the general because ----blood cells, skin cells etc.

4. Allison is trying to identify the type of bacteria found on common surfaces like doorknobs, table tops, etc. For this experiment, she will collect samples of bacteria and allow them to grow for several days. Then, she will observe the bacterial colonies that are formed and compare their appearance with pictures of bacterial colonies in her textbook. Which of the following pieces of equipment will Allison most likely use for the growth of the bacteria?

Answers

You will use a....
Microscope
Graduated Cylinder
Beaker
Petri Dish

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