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3 years ago

PLS HELP WITH THIS DENSITY QUESTIONS AND WHEN SHOWING STEPS PLS USE GRASS

Physics

1 answer:

STatiana [176]3 years ago

4 0

Answer:

Explanation:

Density = mass/volume

132g/(48.9 cm³) = 2.7 g/cm³

(27 g)/(3 cm³) = 9 g/cm³

512 g/(65 cm³) = 7.9 g/cm³

1.2 kg/(3243 cm³) cm³ = 1200 g/(3243 cm³) = 0.37 g/cm³

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Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 × 10-7 W/m2. Another

ioda

Answer:

$6.1875\times 10^{-8}$

Explanation:

Assuming uniform spread of sound with no significant reflections or absorption. We know that sound intensity varies $I=\frac {k}{r^{2}}$ where r is the distance

Since intensity is given then when at 3 m

$1.1\times 10^{-7}= \frac {k}{3^{2}}$

$k=3^{2}\times 1.1\times 10^{-7}= 9.9\times 10^{-7}$

Since we have the constant then at 4m

Intensity, $I= \frac {9.9\times 10^{-7}}{4^{2}}=6.1875\times 10^{-8}$

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3 years ago

Which has the least potential energy

makvit [3.9K]

Answer:

The plasma state would have the least potential energy and the greatest kinetic energy.

Explanation:

i just took the test and i go it right

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3 years ago

Read 2 more answers

Suatu sistem gas berada didalam ruang yang fleksibel. Pada awalnya gas berada pada kondisi P1 = 1,5 × 10 pangkat 5 N/m2, T1 = 27

enot [183]

Answer:

16.00L

Explanation:

First you calculate the number of moles in the system:

$PV=nRT\\\\n=\frac{PV}{RT}\\\\n=\frac{(1.5*10^5N/m^2)(12L)}{(0.082L.atm/mol.K)(300.15K)}=73134.16\ mol$

To find the new volume of the system you use the following formula for an isobaric procedure:

$T_2-T_1=\frac{P}{nR}(V_2-V_1)\\\\V_2=\frac{nR}{P}(T_2-T_1)+V_1\\\\V_2=\frac{(73134.16\ mol)(0.082L.atm/mol.K)}{1.5*10^5N/m^2}(400.15-300.15)K+12L\\\\V_2=16.00L$

hence, the new volume is 16.00L

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4 years ago

A force of 6 N is used to open a door, wherein the distance of the force to the axis of rotation is 80 cm. If the angular accele

Luda [366]

Explanation:

∑τ = Iα

(6 N) (0.80 m) = I (0.5 rad/s²)

I = 9.6 kg m²

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4 years ago

1.what is matter?

MariettaO [177]

1. Matter is anything that has mass and takes up space.
2. Electrons orbit around the nucleus.
3. protons and electrons

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3 years ago