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2 years ago

Which of these describes a nebula?

Biology

2 answers:

Elina [12.6K]2 years ago

5 0

Answer:

A collection of hot gases that sometimes produces light from nuclear reactions.

Explanation:

Solnce55 [7]2 years ago

3 0

I think it’s d

I think it’s d

A collection of dust and gases that forms stars or results from dying stars.

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What is a special type of motor designed to operate with the rotor stalled without damage to the motor?

pochemuha

Answer:

Torque motor

Explanation:

A special type of motor that is designed to operate even when the rotor is stalled is called a torque motor and it does not incur any damage while doing so.

These motors have a toroidal construction and are induction motors.

They have a wide diameter which allows them to have a higher torque and thus, this improves their thermal performance and this enables the motor to keep working even when it is stalled as it can draw high currents.

Further, these motors are usually present without brushes or commutators due to which they can operate at higher speeds.

A torque motor is most commonly found in tape recorders, computer games, throttle controls and actuators.

4 0

3 years ago

the illustration shows a girl.pushing on a heavy box she pushes with a force of 40 N. how can you detwermine if she is doing wor

mariarad [96]

What is representing N thats important.

7 0

4 years ago

What would most likely happen if there were no condensation stage in the water cycle?

Nataliya [291]

Answer:

Water could not convert from a gas to a liquid and the earth will dry out and die.

Explanation:

5 0

3 years ago

If a person removes a colony of honey bees from a structure where they are unwanted, it is a good idea to remove all the wax com

drek231 [11]

Answer:

true

Explanation:

3 0

3 years ago

Autonomic regulation of heart rate is via two reflex centers found in the pons. True or False

prisoha [69]

Answer:

Autonomic regulation of heart is via two reflex centers that are found in medulla oblongata

Explanation:

Medulla oblongata contain long stem that makes the upper part of brain case and this is a cone shaped structure which is responsible for autonomic regulation like controlling heart rate,vomiting,respiration,breathing etc.

The heart rate is controlled by autonomic nervous system that are mainly sympathetic and parasympathetic nervous system that releases hormones like catecholamine (epinephrine and non epinephrine) which helps in controlling the heart rate.

Medulla oblongata mainly connects the brain with the spinal cord that are responsible for responsible for the autonomic functions which contain -

Controlling the ventilation via signalling system regulated by chemo receptors which detects change in acidity of the blood.

Acts on cardiovascular centers.

Controlling the reflex centers like vomiting,coughing,sneezing,swallowing etc.

4 0

3 years ago