A wind turbine can produce electrical energy because

2 answers:

5 0

Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity.

kakasveta [241]4 years ago

5 0

Answer:

Windmills (wind turbines) are generally made up of 2-3 blades that are also considered as the propeller-like blades and this is fixed about the rotor at the top of a pillar or tower at a height of about 80-100 feet. This is because the wind is generally fast at about this height.

The rotor is again fixed to a major shaft, and when the prevailing wind is high enough in that area then the turbines rotate and due to this rotation, the generator within the major shaft starts spinning thereby produces the electricity. Thus they are one of the efficient ways of using wind energy.

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What are the two different results of a lack of calcium and a lack of atp?

liq [111]

There are numerous proteins in muscle. The main two are thin actin filaments and thick myosin filaments. Thin filaments form a scaffold that thick filaments crawl up. There are many regulatory proteins such as troponin I, troponin C, and tropomyosin. There are also proteins that stabilize the cells and anchor the filaments to other cellular structures. A prime example of this is dystrophin. This protein is thought to stabilize the cell membrane during contraction and prevent it from breaking. Those who lack completely lack dystrophin have a disorder known as Duchene muscular dystrophy. This disease is characterized by muscle wasting begininng in at a young age and usually results in death by the mid 20s. The sarcomere is the repeating unit of skeletal muscle.

Muscle cells contract by interactions of myosin heads on thick filament with actin monomers on thin filament. The myosin heads bind tightly to actin monomers until ATP binds to the myosin. This causes the release of the myosin head, which subsequently swings foward and associates with an actin monomer further up the thin filament. Hydrolysis and of ATP and the release of ADP and a phosphate allows the mysosin head to pull the thick filament up the thin filament. There are roughly 500 myosin heads on each thick filament and when they repeatedly move up the thin filament, the muscle contracts. There are many regulatory proteins of this contraction. For example, troponin I, troponin C, and tropomyosin form a regulatory switch that blocks myosin heads from binding to actin monomers until a nerve impulse stimulates an influx of calcium. This causes the switch to allow the myosin to bind to the actin and allows the muscle to contract.

6 0

3 years ago

Which of the following statements is true?

mafiozo [28]

Answer:

The correct answer is: D) The kidneys are paired organs that regulate water and electrolyte balance in terrestrial vertebrates.

Explanation:

The kidneys are the organs that control, for example, the volume of body fluid compartments, acid-base balance, and electrolyte concentrations. These organs are also key to eliminate the toxins from the body.

The kidneys are always two (when not is because of a pathology or the surgical removal of one of the two) and are present in vertebrates.

The kidneys do not regulate blood glucose. That is the job of the pancreas through two hormones called insulin and glucagon.

The kidneys do not remove nitrogenous wastes (urea) from the urine, instead they filtrate these wastes from the blood for these to be excreted through urine.

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3 years ago

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B. What are two examples that can be found inside a cell?

valentina_108 [34]

Answer:

Nucleus and chorlophlast

Explanation:

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3 years ago

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Which scenario describes a renewable resource being used for energy?

Ann [662]

Wind energy
Hydro power energy
Geothermal energy
Solar energy

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3 years ago

You are conducting a CRISPR-Cas9 experiment. You transform a cell with Cas9 and a guide RNA (contains the scaffold and guide seq

SOVA2 [1]

Answer:

Cas9-sgRNA cannot align with targeted DNA sequence

Explanation:

Without a PAM sequence, the CRISPR-sgRNA (small guide RNA) complex cannot align with the targeted DNA sequence. Therefore, you cannot perform experiments (e.g. gene editing) using CRISPR-Cas9.

8 0

3 years ago