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3 years ago

Why did one liter of have a greater mass than the other liter prepared by a different method

Physics

2 answers:

VikaD [51]3 years ago

4 0

Maybe the water wasnt stable enough and probably couldnt read the water level correctly

gavmur [86]3 years ago

4 0

Nobody can answer your question, because we have no idea
what belongs after the word "... of ...", so we don't know what
substance(s) you're talking about.

All we can say for sure is that the first method produces the substance
with greater density, because it has more mass in the same volume.

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classic physics problem states that if a projectile is shot vertically up into the air with an initial velocity of 128 feet per

ddd [48]

Answer:

$t_1 = 0.28 s$

$t_2 = 7.72 s$

Explanation:

Given that height of the projectile as a function of time is

$h = -16 t^2 + 128 t + 112$

here we know that

h = 147 ft

so from above equation

$147 = -16 t^2 + 128 t + 112$

$16 t^2 - 128 t + 35 = 0$

now by solving above quadratic equation we know that

$t_1 = 0.28 s$

$t_2 = 7.72 s$

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2 years ago

A vacuum cleaner produces sound with a measured sound level of 75.0 dB. (a) What is the intensity of this sound in W/m2? W/m2 (b

jonny [76]

Answer:

Part a)

$I = 3.16 \times 10^{-5} W/m^2$

Part b)

$P_o = 0.162 Pa$

Explanation:

Part a)

Level of sound = 75 dB

now we know that

$L = 10 Log\frac{I}{I_0}$

here we know that

$I_0 = 10^{-12} W/m^2$

now we have

$75 = 10 Log(\frac{I}{10^{-12}})$

$I = 3.16 \times 10^{-5} W/m^2$

Part b)

Intensity of sound wave is given as

$I = \frac{1}{2}\rho A^2\omega^2 c$

here we know that

$A = \frac{P_o}{Bk}$

so we have

$I = \frac{1}{2}\rho(\frac{P_o}{Bk})^2\omega^2 c$

$I = \frac{1}{2}\rho P_o^2 \frac{c^3}{B^2}$

now we know

$\rho = 1.2 kg/m^3$

$c = 340 m/s$

$B = 1.4 \times 10^5 Pa$

now we have

$3.16 \times 10^{-5} = \frac{1}{2}(1.2)P_o^2\frac{340^3}{(1.4\times 10^5)^2}$

$P_o = 0.162 Pa$

5 0

3 years ago

A body, with a volume of 2 m3, weighs 40 kN. Determine its weight when

lana66690 [7]

Answer:

8.8 kN

Explanation:

V = 2 m³, W = 40 kN, SG = 1.59

Bouyant force N = 1.59 * 1000 kg/m³ * 9.81 N/kg * 2 m³ = 31.2 kN

So the weight becomes 40 - 31.2 = 8.8 kN

3 0

2 years ago

Atoms with fewer than 4 valence electrons want to give away their electrons to become what

krek1111 [17]

Answer:

Stable, Cation, Donor Atom

Explanation:

When an atom has less than 4 electrons in its valence shall, it tends to lose those electrons to becomes stable. Because an atom becomes stable when its valence shell is complete. So, when it loses the electrons its valence shell becomes complete. Also, after the loss of the electrons a positive charge is developed on the atom and it becomes an cation or donor atom.

Hence, there can be multiple answers to this question.

Atoms with fewer than 4 valence electrons want to give their electrons to become <u>Stable, Cation, Donor Atom.</u>

4 0

3 years ago

Read 2 more answers

How is energy related to the change of state represented by the model? Atoms gain energy as a gas changes to a solid. Atoms gain

amm1812

Answer: C) Atoms lose energy as a gas changes to a solid.

Explanation:

Energy is related to the change of state represented by the model in this way Atoms lose energy as a gas changes to a solid. As a certain gas is changing its state into that of a solid material, its atoms are going to lose some energy.

6 0

3 years ago