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3 years ago

Sugar is a pure substance, but it is not an element. Which sentences support this statement?

Physics

1 answer:

larisa [96]3 years ago

4 0

The process of cellular respiration uses sugar and provides energy to cells.

Animals break down sugar through cellular respiration.

Explanation:

An element is a distinct substance that cannot be split-up into simpler substances. Elements are substances made up of a single atom.

Compounds are substances composed of two or more kinds of atoms that are joined together. The properties of a compound are distinct from those of the combining atoms.

When compound breaks down, their atoms are re-arranged and energy is often released.

This is why sugar is a compound capable of releasing energy. It is because it is a compound.

If atoms are broken down, they release nuclear energy in the process. This form of energy is clearly different from that which accompanies the breaking down of a compound.

*****

Sugar dissolving in water does not show that it is a compound. Some elements are also capable of being dissolved in water.

Chemical reactions are not only designed for compounds, elements and molecules are also involved.

Learn more:

Compound brainly.com/question/10216585

Compound undergoing combustion brainly.com/question/4467499

#learnwithBrainly

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A basketball player throws a chall -1 kg up with an initial speed of his hand at shoulder height = 2.15 m Le gravitational poten

Talja [164]

Complete Question:

A basketball player tosses a basketball m=1kg straight up with an initial speed of v=7.5 m/s. He releases the ball at shoulder height h= 2.15m. Let gravitational potential energy be zero at ground level

a) Give the total mechanical energy of the ball E in terms of maximum height hn it reaches, the mass m, and the gravitational acceleration g.

b) What is the height, hn in meters?

Answer:

a) Energy = mghₙ

b) Height, hₙ = 5.02 m

Explanation:

a) Total energy in terms of maximum height

Let maximum height be hₙ

At maximum height, velocity, V=0

Total mechanical energy , E = mgh + 1/2 mV^2

Since V=0 at maximum height, the total energy in terms of maximum height becomes

Energy = mghₙ

b) Height, hₙ in meters

mghₙ = mgh + 1/2 mV^2

mghₙ = m(gh + 1/2 V^2)

Divide both sides by mg

hₙ = h + 0.5 (V^2)/g

h = 2.15m

g = 9.8 m/s^2

V = 7.5 m/s

hₙ = 2.15 + 0.5(7.5^2)/9.8

hₙ = 2.15 + 2.87

hₙ = 5.02 m

6 0

3 years ago

Which method best helps to prevent wind erosion?

docker41 [41]

Answer:

A. rotating crops

Explanation:

7 0

3 years ago

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mafiozo [28]

The answer is “Impulse acting on it” according to the impulse-momentum theorem.

6 0

3 years ago

A solar panel measures 0.57 m by 1.3 m. In direct sunlight, the panel delivers 6.6 A at 6 V. If the intensity of sunlight is 300

zheka24 [161]

Answer:

efficiency of solar panel is 18%

Explanation:

Energy received by the sunlight is given as

$Power = intensity \times area$

here we know the dimensions of the plate as

$L = 0.57 m$

$W = 1.3 m$

now we have

$Area = (0.57)(1.3) m^2$

$A = 0.741 m^2$

now the power received by the sun light is given as

$P_1 = 0.741(300) = 222.3 W$

now the output power due to solar panel is given as

$P_{out} = V i$

$P_{out} = (6.6 A)(6 V)$

$P_{out} = 39.6 Watt$

now the efficiency is given as

$\eta = \frac{P_{out}}{P_{in}}$

$\eta = \frac{39.6}{222.3}$

$\eta = 0.18$

8 0

3 years ago

Which country or region is coal-rich and oil-poor?

zimovet [89]

THE ANSWER FOR UR QUESTION IS

WHICH COUNTRY OR REGION IS COAL RICH AND OIL POOR
ANS:- UNITED STATES IS THE COUNTRY WHICH IS COAL RICH AND OIL POOR

HOPE THIS HELPS!!!

^_^ HAPPY TO HELP U ^_^

5 0

3 years ago