An object has a mass of 48g and a volume of 6cm cubed (like a little 3 above the m) Calculate the density of this object
Answers
Density = (mass) / (volume)
= (48 g) / (6 cm³)
= (48 / 6) (g / cm³)
= 8 g/cm³
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Help with #3 please
A nerve signal is like a wave. how does this work?
Which factors are used the calculate the kinetic energy of an object? Check all that apply. gravity velocity volume mass height
In a transverse wave that travels through a medium, the molecules of the medium vibrateA. at right angles to the direction in which the wave travels.B. at twice the velocity of the molecules in a longitudinal wave.C. with smaller amplitudes than the molecules in a longitudinal wave.D. in the direction in which the wave travels
b. its melting point
c. its amount of heat transferred
d. its rate of change in temperature
Answers
The following that is is most closely related to the specific heat of a substance is its rate of change in temperature. The answer is letter D. The amount of energy required to raise the temperature of 1 kilogram of a substance by 1 Kelvin is called the specific heat. The answer is a. For example, water. Water has a specific heat of 4.18 Joules per kilogram per Kelvin. This means that in order for water to change from one state to the other at one kelvin, it needs 4.18 Joules of energy per one kilogram of water. But it does not apply to changes in phase, because the heat added or removed during a phase change does not change the temperature of a substance.
Answers
The average distance between earth and moon would be - 384,000 kms.
This is calculated by the formula -> Distance = Speed x Time.
II) It cannot be dispersed
III) It can be reflected *
Answers
Answer:
It can be refracted
Explanation:
When a single wavelength wave which is known as a monochromatic light is passed from one transparent medium to the other, it can refract. This refraction can only be seen if the light enter the medium at some angle.
Answers
If the '46.4' is ' meters per second² ' , then the force required is
(mass of the object in kilograms) x (46.4) newtons .
Answers
Physical changes refer to alterations in the properties or characteristics of matter without changing its chemical composition. Some examples of physical changes include changes in state, size, shape and color.
Changes in state are common physical changes that occur when matter transitions between solid, liquid, or gas phases. This change occurs due to a change intemperature or pressure. For example, water freezing into ice or boiling into steam are examples of changes in state.
Changes in size, shape, and texture occur when matter undergoes physical alterations without any changes in its chemical composition. For instance, cutting a piece of paper into small pieces, hammering a metal sheet to make it thinner, or molding clay into a different shape are all examples of physical changes.
Changes in color are also physical changes. They occur when the light-reflecting properties of a material change due to a physical alteration. For instance, when copper is exposed to air, it turns green due to a chemical reaction, but when iron rusts, it changes color due to a physical change in its surface.
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B. Pass the solution through a filter to let the dissolved substance separate.
C. Use a magnet to draw out the solid substance from the water.
D. Pour the liquid along a rough surface that would catch the solid particles but not the water.
Answers
Boiling the water away, leaving the substance behind in the beaker is the way to separate the mixture. The correct option is A.
What is a mixture?
A mixture is basically a substances comprised of two or many distinct chemical substances which are indeed not linked covalently.
A mixture is the usually physicalcombination of two or more substances that retain their identities as well as are mixed in the way to form solutions, suspensions, along with colloids.
When two or more distinct substances are physically combined, a mixture is formed that can be distinguished back into its original substances.
When two or more substances combine to form a new substance that cannot be separated back into its original substances, a chemical reaction occurs.
The mixture can be separated by boiling the water away and leaving the substance in the beaker.
Thus, the correct option is A.
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Answer:
I think the answer is a because boiling water cleans it