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2 years ago

Please help please help NO LINKS

Biology

1 answer:

Setler [38]2 years ago

6 0

Answer:

The tyres of car wear out gradually, due to the frictional force. Frictional force arises between two objects when they move over one another. In the given cases it arises between the tyre and the surface which it is travelling on.

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a cell is placed in a solution of 3% starch and 3% glucose. After several hours, glucose is detected outside of the cell, but st

Alex17521 [72]

Answer and Explanation:

The cell was placed in a hypertonic solution. Glucose is a monosaccharide while starch is a polysaccharide. The concentration on the outside is higher compared to that on the inside. The cells have cell membrane that is semi-permeable.

Movement of molecules is dependent on the concentation gradient. However, the size of molecules determine the diffusion rate. Small and light molecules diffuse faster than large and heavy molecules thus glucose diffused faster than starch.

The cell membrane being permeable suggested that it allows molecules of small sizes to pass but not large ones.

7 0

2 years ago

Explain three advantages of using fossil fuels

just olya [345]

according to sciencethreads.com

it states the following pros and advantages of fossil fuels..

1)Fossil fuels have a very high calorific value.

2)the energy produced by fossil fuels is greater than that produced by an equivalent amount of other energy resource.

3)Systems are set up to process and utilize oil and gas

4)Widely available around the globe

5)low cost per unit energy

6)Refineries, transportation, and plastics all rely heavily on oil and gas

7)High energy output

8)Employs millions of people globally

9)The primary source of all plastics

hope this helps :)

3 0

3 years ago

Prolonged stress due to sustained child abuse is associated with reductions in the size of the:

spin [16.1K]

Prolonged stress due to sustained child abuse is associated with reductions in the size of the: hippocampus

5 0

3 years ago

How is energy from flowing water different from iron,petroleum or coal ?

Sati [7]

The energy produced from flow of water or "Hydro-power" is different to energy produced from iron, petroleum and coal as it is a clean and renewable form of energy. Hydro-power is derived from the kinetic energy of the natural flow of water like in the case of a water mill whereas the other forms listed require combustion of the fuel source that produces harmful gases leaving a negative impact on the environment. Also, hydro-power is one of the cheapest forms of energy production.
However, it should be noted that large-scale production of electrical energy from flowing water known as "Hydroelectric Power" uses man-made dams to store water in lakes as a source of potential energy. These dams can also have a negative impact on the environment as the natural flow of water is restricted. Some scientists also suggest that the construction of a dam leads to an increase in the number of earthquakes in and around the area of construction.

3 0

3 years ago

Signs and symptoms that a woman should report immediately to her health care p rovider include:________.

solong [7]

The question is incorrect.

the correct question is Signs and symptoms that a prenant woman should report immediately to her health care provider include:________.

a. vaginal bleeding

b. rupture of membranes

c. heartburn with severe headache

d. decreased libido

e. urinary frequency

Answer:

a. vaginal bleeding

b. rupture of membranes

c. heartburn with severe headache

Explanation:

A pregnant woman should report immediately about vaginal bleeding

, rupture of membranes

, and heartburn with severe headache to her health care provider.

A) Vaginal bleeding: vaginal bleeding is uterine bleeding, which is common in the earlier stage of pregnancy but if it is continous it can be symptoms of miscarriage, so one should immediately contact her healthcare provider.

B) Rupture of membranes: If any pregnant women experience rupture of membrane, it causes steady leakage of fluid from the vagina. If the rupture is preature it can cause some complications in the baby such as premature birth, infection, and cord compression.

C) Heartburn with severe headache: if a woman experiences heartburn with severe headache during pregnancy, she should immediately contact her healthcare provider as it can be symptoms of preeclampsia (condition develops during the second half of pregnancy).

Hence, the correct options are a) vaginal bleeding

, b) rupture of membranes

, and c) heartburn with severe headache

6 0

3 years ago

Please help please help NO LINKS​

Please help please help NO LINKS