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4 years ago

What is transpiration

1 answer:

5 0

Transpiration is the evaporation of water from plants. This occurs when water drawn from the roots is brought up the leaves (as it usually should), and, because of the outside heat, it vaporizes and exits via the pores found on the underside of the leaves.

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A cylindrical rod 21.5 cm long with a mass of 1.20 kg and a radius of 1.50 cm has a ball of diameter of 6.90 cm and a mass of 2.

Sergeeva-Olga [200]

Answer

given,

length of rod = 21.5 cm = 0.215 m

mass of rod (m) = 1.2 Kg

radius, r = 1.50

mass of ball, M = 2 Kg

radius of ball, r = 6.90/2 = 3.45 cm = 0.0345 m

considering the rod is thin

$I = \dfrac{1}{3}M_{rod}L^2 + [\dfrac{2}{5}M_{ball}R^2+M_{ball}(R+L)^2]$

$I = \dfrac{1}{3}\times 1.2 \times 0.215^2 + [\dfrac{2}{5}\times 2 \times 0.0345^2+2\times (0.0345 +0.215)^2]$

I = 0.144 kg.m²

rotational kinetic energy of the rod is equal to

$KE = M_{rod}g\dfrac{L}{2} + M_{ball}g(L+R)^2$

$KE = 1.2 \times 9.8 \times \dfrac{0.215}{2} + 2\times 9.8\times (0.215+0.0345)^2$

KE = 6.15 J

b) using conservation of energy

$K_f + U_f = K_i + U_i + \Delta E$

$\dfrac{1}{2}I\omega^2+ 0=0 + 6.15+0$

$\dfrac{1}{2}\times 0.144 \times \omega^2= 6.15$

ω = 9.25 rad/s

c) linear speed of the ball

v = r ω

v = (L+R )ω

v = (0.215+0.0345) x 9.25

v =2.31 m/s

d) using equation of motion

v² = u² + 2 g h

v² = 0 + 2 x 9.8 x 0.248

v = √4.86

v =2.20 m/s

speed attained by the swing is more than free fall

% greater = $\dfrac{2.31-2.20}{2.20}\times 100$

= 5 %

speed of swing is 5 % more than free fall

6 0

3 years ago

Electric Charge

alina1380 [7]

The materials that are conductors are Metal doorknob, Silver, Gold, Copper, Metal coat hanger, Paper clip, while insulators are Carpet, Wood, Rubber, Bulletin board, Clothing, Plastic.

<h3>What are electric conductors?</h3>

Conductors are materials that allow electric current to pass through them.

<h3>What are Insulators?</h3>

Insulators are materials that do not allow electric current to pass through them.

<h3>Examples of conductors</h3>

Metal doorknob
Silver
Gold
Copper
Metal coat hanger
Paper clip

<h3>Examples of insulators</h3>

Carpet
Wood
Rubber
Bulletin board
Clothing
Plastic

Learn more about conductors and insulators here: brainly.com/question/492289

4 0

2 years ago

What is the ability of an organism to change internally or externally in relation to its environment

MAXImum [283]

Homestasis is the word .

6 0

3 years ago

Water shortages means.no no no links pls <br>

Ann [662]

Answer:

The lack of sufficient water resources, including a lack of access t safe water supplies, to meet water needs within a region.

Explanation:

3 0

3 years ago

A string wound around a cylinder of 10.0 cm

laila [671]

A string wound around a cylinder of 10 cm<span> radius has a 150 gram mass attached. When released, the mass accelerates at 50 </span>cm/s2<span>.</span>

7 0

4 years ago