Density is ____ per unit volume.
Answers
Answer:
mass
Explanation:
The density of a substance is defined as the ratio of mass of the substance to the volume of the substance.
It is a scalar quantity.
Its SI unit is kg/m^3.
By comparing the densities we get the idea about how dense the substance is.
For example, cotton and iron, the density of cotton is much less than iron so the cotton is less dense than iron.
The relative density is defined as the ratio of density of substance to the density of water at 4 degree C.
The density of water is maximum at 4 degree C.
Final answer:
Density is the mass per unit volume.
Explanation:
Density is a physical property of matter that describes the mass of a substance per unit volume. It is typically expressed in units like grams per cubic centimeter or kilograms per cubic meter. Density helps identify and compare substances, as objects with higher density are heavier for a given volume, while less dense substances are lighter.
Density is the mass per unit volume of a substance or object, defined as p = m/V. The SI unit of density is kg/m³. For many situations, grams per cubic centimeter (g/cm³) are used for the densities of solids and liquids, and grams per liter (g/L) are used for gases.
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Fluid pressure ____________ as depth ____________.a. decreases, increasesc. increases, increasesb. decreases, decreasesd. both b and c are correct
Answers
The speed of the plane without a wind is 430 miles/hr and speed of the wind is 20 miles/hr.
What is Speed ?
Speed is a rate of change of distance with respect to time. i.e. v=dx÷dt. Speed can also be defined as distance over time
i.e. speed= distance ÷ time
it is denoted by v and its SI unit is m/s. it is a scalar quantity.
Speed shows how much distance can be traveled in unit time.
To find dimension for speed is, from formula
Speed = Distance ÷ Time
Dimension for distance is [L¹] ,
Dimension for Time is [T¹],
Dividing dimension of distance by dimension of time gives,
{L¹] ÷ [T¹] = [L¹T⁻¹]
Dimension for speed is [L¹T⁻¹].
Consider,
Speed of the plane = v
Speed of the wind = u
Speed of the wind in the direction of wind is,
v + u = 450 miles/hr.....1
Speed of the wind in the opposite direction of wind is,
v - u = 410 miles/hr.....2
Adding equation 1 and 2
2v = 860
v = 430 miles/hr
Subtracting equation 1 and 2
2u = 40
u = 20 miles/hr
Hence the speed of the plane without a wind is 430 miles/hr and speed of the wind is 20 miles/hr.
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the plane is 430 and the wind it 20miles
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In every electricity generator for example, it spin a huge magnet within the generator to generate electric power. Hope this helps
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Answer:
No
Explanation:
The statement is implying that if you do a certain amount of work, you're entitled to do a certain amount of work. Sometimes, work doesn't entitle you a reward.
Final answer:
Taking the stairs does not justify eating a whole 'Chocolate Fondue for Two' from a health perspective. The calories burned climbing stairs would not offset the number of calories consumed from the chocolate.
Explanation:
This question appears to be related more towards the subject of Health and nutritional decisions. Eating an entire 'Chocolate Fondue for Two' by yourself due to taking the stairs instead of the elevator does not necessarily justify the act from either a health or dietary perspective. While taking the stairs can increase your physical activity and burn some calories, the amount burned would not be significant enough to counterbalance the high calorie intake from consuming 1lb of dark chocolate. An average individual may burn around 10 calories for every minute they spend climbing stairs, which would not make up for the roughly 2,200 calories present in a pound of dark chocolate.
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Answers
B. lower pitch
C. higher volume
D. lower volume
Answers
Final answer:
Higher-frequency sound waves are perceived as having a higher pitch. This is because the pitch of a sound, which our brains perceive as either high or low, is directly related to the frequency of the sound wave. Finally, the volume or loudness of a sound is related to the amplitude of the wave, not its frequency.
Explanation:
Higher-frequency sound waves are perceived as having a A. higher pitch.
The pitch of a sound is directly related to its frequency. In other words, as the frequency of a sound wave increases, the pitch that we hear also increases. Thus, sounds with higher frequencies are heard as having a higher pitch. This is why when you tune a musical instrument, increasing the tension of a string will increase its frequency of vibration, producing a higher pitch.
On the other hand, volume, also known as loudness, is related to the amplitude of sound waves, not their frequency. So higher-frequency sound waves are not necessarily louder or softer, their volume depends on other factors such as the amplitude of the wave.
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