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3 years ago

If you have a density of 5 g/mL and a mass of 2.5 g, what is the volume?

Physics

1 answer:

Korvikt [17]3 years ago

5 0

Density = Mass/Volume
2.5 g/ml = 5g/Volume
Volume = 5g/(2.5 g/ml)
= 2 ml

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I AM SO SORRY THIS TIME I PUT IT LOL

Fittoniya [83]

Answer:

a Internal core

b The lower mantle

c Butter dough

d Earth rocks

7 0

2 years ago

In a particular spontaneous process the entropy of the system decreases. What can you conclude about the sign and magnitude of δ

Veronika [31]

Answer:

▲Ssurroundings is +ve and greater than ▲Ssystem

Explanation:

The Second Law of

Thermodynamics

States that, a spontaneous process leads to an increase in the entropy of the universe. That is for a spontaneous process ∆Suniv > 0

or ▲Ssystem + ▲Ssurroundings > 0

Hence according to the Second Law of Thermodynamics when

▲Suniverse > 0, means that the process is spontaneous

▲Suniverse = 0 the process will not take place under ordinary condition

▲Suniverse < 0, The backward, opposite or alternate process occurs

spontaneously

Therefore since the process is spontaneous

∆Suniv = ▲Ssystem + ▲Ssurroundings > 0

However ▲Ssystem < 0

Therefore ▲Ssurroundings - ▲Ssystem

> 0 or

▲Ssurroundings > ▲Ssystem

Hence ▲Ssurroundings is +ve and greater than ▲Ssystem

6 0

3 years ago

A 45-kg box containing a new bicycle has just arrived in the front porch and two brothers are fighting over it. The first brothe

Hitman42 [59]

Answer:

0.17

Explanation:

Draw a free body diagram. There are five forces on the box:

Weight force mg pulling down

Normal force Fn pushing up

Applied force 52 N pulling to the left

Applied force 125 N pulling to the right

Friction force Fnμ pulling to the left

Sum of the forces in the y direction:

∑F = ma

Fn − mg = 0

Fn = mg

Fn = (45)(9.8)

Fn = 441

Sum of the forces in the x direction:

∑F = ma

125 − 52 − Fnμ = 0

Fnμ = 73

μ = 73 / Fn

μ = 73 / 441

μ = 0.17

7 0

3 years ago

while a block slides forward 1.35 m, a force pulls back at a 135 direction, doing -17.8 J of work. what is the magnitude of the

igomit [66]

The magnitude of the force is 18.6 N

Explanation:

The work done by a force pushing/pulling an object is given by the equation:

$W=Fd cos \theta$

where:

F is the magnitude of the force

d is the displacement of the object

$\theta$ is the angle between the direction of the force and the direction of the displacement

For the block in this problem, we have:

$W=-17.8 J$ is the work done

d = 1.35 m is the displacement

$\theta=135^{\circ}$ is the angle

Solving the equation for F, we find the magnitude of the force:

$F=\frac{W}{dcos \theta}=\frac{-17.8}{(1.35)(cos 135)}=18.6 N$

Learn more about work here:

brainly.com/question/6763771

brainly.com/question/6443626

#LearnwithBrainly

3 0

3 years ago

dvanced photodiode detectors have a second light-emitting diode, operating at a wavelength of 2.0 × 10–7 m, to detect even small

ICE Princess25 [194]

Answer:

$1.5\cdot 10^{15}Hz$

Explanation:

The relationship between wavelength and frequency is given by:

$c=f \lambda$

where

$c=3\cdot 10^8 m/s$ is the speed of light

f is the frequency

$\lambda$ is the wavelength

In this problem, we know the wavelength:

$\lambda=2.0\cdot 10^{-7} m$

So we can re-arrange the formula above to find the frequency:

$f=\frac{c}{\lambda}=\frac{3.0\cdot 10^8 m/s}{2.0\cdot 10^{-7} m}=1.5\cdot 10^{15}Hz$

5 0

3 years ago