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Dovator [93]
3 years ago
12

The periodic table lists all the compounds on Earth. True or False?

Physics
1 answer:
In-s [12.5K]3 years ago
8 0
False. Maybe you were talking about elements? If these were elements then the answer could be TRUE.
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calculate the work done to stretch an elastic string by 40cm if a force of 10N produces an extension of 4cm in it?
Charra [1.4K]
100N is how much work is needed 
4 0
3 years ago
A 45-gram object that has a volume of 9 mL has a density of
yanalaym [24]

Answer:

<h2>  The answer is </h2><h2>a. 5g/mL</h2>

Explanation:

Given data

mass m= 45g

volume v= 9mL

we know that density=m/v

substituting our given data we have

density=\frac{45}{9} =5g/mL

What is Density?

The Density of a body can be defined as the ratio of mass to volume,

or

Density, mass of a unit volume of a material substance. The formula for density is Density= \frac{mass}{volume},

where d is density,

M is mass, and

V is volume.

Density is commonly expressed in units of grams per cubic centimetre.

7 0
3 years ago
a sound wave with a frequency of 300 hertz is traveling through a medium at a speed of 320 meters/second. what is the wavelength
ss7ja [257]
Wavelength = Velocity / frequency

320 / 300

= 1.06
5 0
3 years ago
Read 2 more answers
How many cranial nerves do we have
maxonik [38]
12.


The twelve cranial nerves are: olfactory nerve, optic nerve, oculomotor nerve, trochlear nerve, trigeminal nerve, abducens nerve, facial nerve, vestibulocochlear nerve, glossopharengeal nerve, vagus nerve, spinal accessory nerve, and hypoglossal nerve.
:)
8 0
3 years ago
An astronaut weighing 248 lbs on Earth is on a mission to the Moon and Mars. (a) What would he weigh in newtons when he is on th
lesantik [10]

Answer:

W_m=183.495N

Explanation:

From the question we are told that:

Weight W=248Ibs

Mass of Weight  m= 248*0.453

                          m=112.344kg

Generally the acceleration due to gravity on the Moon is one-sixth that on Earth.

Therefore

The equation for Weight on Moon is given as

 W_m=m*g/6

 W_m=122.344*\frac{9.8}{6}

 W_m=183.495N

3 0
3 years ago
Read 2 more answers
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