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3 years ago

Describe the life of a damselfly

2 answers:

6 0

Life Span. The life span of damselflies varies between species and within species depending on environmental factors. After one to three weeks, the eggs, laid in water, usually hatch, releasing the larvae or nymphs, but eggs laid in late summer may overwinter before hatching.

antiseptic1488 [7]3 years ago

3 0

Dragonflies and damselflies have a fascinating life history. Most their life is spent underwater, first as an egg and then as a larva (or nymph) and they have a comparatively short adult life, being "on the wing" for a few weeks only.

Hope this helps :)

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What is the major underlying principle of chromatography?.

KatRina [158]

Separation will be achieved if one component adheres to the stationary phase more than the other component does.

6 0

2 years ago

Read 2 more answers

Write an informal definition of half-life.

Pavel [41]

the time required for the activity of a substance taken into the body to lose one half its initial effectiveness. Informal. a brief period during which something flourishes before dying out.

hope this helps ^^

6 0

3 years ago

Give the number of covalent bonds that a carbon atom can form.

polet [3.4K]

Answer:

four covalent bonds

Explanation:

A carbon atom would form 4 covalent bonds.

For a covalent bond to be formed, an atom would share its valence electrons with another. In this process, each atom would require unpaired electrons for this bond to be formed. The number of available unpaired electrons would represent the number of electrons needed to complete the outer energy level of the atom.

In a carbon atom, we have no lone pair of electrons and 4 unpaired electrons. When these 4 electrons are shared with those of other atoms, they produce a complete octet which perfectly mimics the noble gases.

3 0

3 years ago

How many nitrogen atoms are in NH3?

valkas [14]

Three
Ammonia, NH3, is a chemical compound composed of one nitrogen atom and three hydrogen atoms.

8 0

3 years ago

Newton’s second law of motion is F=ma A net force of 60 N north acts on an object with a of 30 kg. Use Newton’s second law of mo

Luda [366]

Answer: The acceleration of the object is $2m/s^2$ . If net force increases, acceleration will also increase and if mass increases, the acceleration will decrease.

Explanation:

Force is defined as the product of object's mass and acceleration.

Mathematically,

$F=ma$ ......(1)

or,

$a=\frac{F}{m}$ .....(2)

where,

F = Force exerted on an object = 60N

m = mass of an object = 30kg

a = acceleration of the object = ?

Putting values in above equation, we get:

$a=\frac{60kg.m/s^2}{30kg}=2m/s^2$

The acceleration of the car is $2m/s^2$ .

From equation 2, it is visible that acceleration is directly proportional to force. This means that \if force increases, acceleration also increases.

And acceleration is inversely proportional to mass of the object. This means that if mass increases, the acceleration decreases.

Hence, if net force increases, acceleration will also increase and if mass increases, the acceleration will decrease.

8 0

3 years ago