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podryga [215]
3 years ago
6

3. Name four examples of:(a) mixtures(b) compounds(c) elements​

Physics
2 answers:
Keith_Richards [23]3 years ago
6 0
Examples of mixtures:

Smoke and fog (Smog), Dirt and water (Mud), Sand, water and gravel (Cement), Water and salt (Sea water), Potassium nitrate, sulfur, and carbon (Gunpowder), Oxygen and water (Sea foam), Petroleum, hydrocarbons, and fuel additives (Gasoline)

Examples of compounds:

sodium chloride, sucrose, nitrogen gas, a sample of copper, and water.

Examples of elements: carbon, oxygen, hydrogen, gold, silver and iron.
Anika [276]3 years ago
4 0

Answer:

examples of mixture: smoke,fog,sand, potassium nitrate, sulfur and carbon.

examples of compounds: mithane, ammonia,salt and nitrous oxide.

examples of elements: hydrogen , helium, oxygen and neon.

Explanation:

there are more elements

You might be interested in
Which of the following quantities are vectors? Select all that apply. Which of the following quantities are vectors? Select all
andrew11 [14]

Answer:

1980 kg m/s due south

8.2 m/s2 north-west

Explanation:

In order a quantity to be a vector, it should both has a magnitude and direction.

27 J/s --> Only magnitude. (Power)

1980 kg m/s due south --> Both magnitude and direction. (Momentum)

8.2 m/s2 north-west --> Both magnitude and direction. (Acceleration)

3.2 mi straight up --> Direction is not clear. (Position)

2.9 m/s2 --> Only magnitude. (Magnitude of acceleration)

293 K --> Only magnitude. (Temperature)

200 s --> Only magnitude. (Time)

5 0
4 years ago
A 5.00 kg pendulum swings back and forth. At the top of its arc, it reaches a height of 0.36 m. What is the velocity of the pend
ella [17]
Tools we'll use:

--     Gravitational potential energy = (mass) x (gravity) x (height)

--     Kinetic energy (of a moving object) = (1/2) (mass) x (speed)²

When the pendulum is at the top of its swing,
its potential energy is

                             (mass) x (gravity) x (height)

                         =  (5 kg) x (9.8 m/s²) x (0.36 m)

                         =      (5 x 9.8 x 0.36)        joules

                         =            17.64 joules .

Energy is conserved ... it doesn't appear or disappear ...
so that number is exactly the kinetic energy the pendulum
has at the bottom of the swing, only now, it's kinetic energy:

                   17.64 joules  =  (1/2) x (mass) x (speed)²

                   17.64 joules  =  (1/2) x (5 kg) x (speed)²

Divide each side by 2.5 kg:

                   17.64 joules / 2.5 kg  =  speed²

Write out the units of joules:

                   17.64 kg-m²/s²  /  2.5 kg  =  speed²

                   (17.64 / 2.5) (m²/s²)  =  speed²

                       7.056 m²/s²  =  speed²

Take the square root
of each side:              Speed = √(7.056 m²/s²)

                                           =    2.656 m/s .

Looking through the choices, we're overjoyed to see
that one if them is  ' 2.7 m/s '.  Surely that's IT !
_______________________________

Note:
The question asked for the pendulum's 'velocity', but our (my) calculation
only yielded the speed.

In order to describe a velocity, the direction of the motion must be known,
and the question doesn't give any information on exactly how the pendulum
is hanging, and how it's swinging. 

We know that at the bottom of its swing, the motion is completely horizontal,
but we have no clue as to what direction.  So all we can discuss is its speed.
6 0
3 years ago
Which part of the ocean is deepest?
vazorg [7]

Answer:

The oceans' deepest area is the Mariana Trench, also called the Marianas Trench, which is in the western part of the Pacific Ocean. The trench is 1,554 miles long and 44 miles wide, or 120 times larger than the Grand Canyon. According to the National Oceanic and Atmospheric Administration, the trench is almost 5 times wider than it is deep.

Explanation:

6 0
3 years ago
8. A man takes one minute to lift 4 bags of sugar each of weight 50N
timofeeve [1]

Answer:

D

Explanation:

the formula is F=mgh

so now you can write it like

m= 4×50=200

200×1.5×10=30000

6 0
3 years ago
1) As evaporation increases, salinity____
vlada-n [284]
What's your question? is it seprete questions
3 0
3 years ago
Read 2 more answers
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