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trasher [3.6K]
3 years ago
7

Only 4 questions plz answer.

Physics
2 answers:
saul85 [17]3 years ago
7 0
The second pic is the second choice I believe
Rom4ik [11]3 years ago
3 0

I know that 1 is more gas but the others I cant read them.

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How can you use the volume of some quantity of a pure substance to calculate its mass
dangina [55]
Firstly, you must identify the pure substance first. Then, from a reliable source obtain its density. Density is calculated through the equation,
                                   
                                  density = mass / volume

From this equation, the volume can be calculated.
                                  
                                   volume = mass / density

3 0
3 years ago
we measure a voltage difference of 5.0 V between two points on the conducting paper between two parallel conducting electrodes.
Alex17521 [72]

Answer:

E=1824.81 V/m

Explanation:

Given that

Voltage difference = 5 V

Distance ,D= 3 mm

 θ = 24°

As we know that electric filed given as

E=\dfrac{V}{d}

Given that D is 24° with respect to the perpendicular to the electrodes.So we have to take cos component of D.

d= D cosθ

d= 3 cos24°

d = 2.74 mm

So

E=\dfrac{V}{d}

E=\dfrac{5}{2.74\times 10^{-3}}

E=1824.81 V/m

8 0
3 years ago
Mework
S_A_V [24]

The force applied by the student is 75 N

Explanation:

We can solve this problem by using Newton's second law, which states that the  force applied on an object is equal to the product between the mass of the object and its acceleration:

F=ma

where

F is the force applied

m is the mass of the object

a is the acceleration

In this problem,

m = 50 kg

a=1.5 m/s^2

Substituting, we find the force applied by the student:

F=(50)(1.5)=75 N

Learn more about Newton's second law of motion:

brainly.com/question/3820012

#LearnwithBrainly

8 0
3 years ago
Laurie is moving a dresser with a mass of 250 kg. She does 126 J of work with a force if 14 N. How far does she move the dresser
DanielleElmas [232]

Answer: 9 m

Explanation:

Work is said to be done when an unbalanced force causes displacement of the body.

Force is the product of mass (m) and acceleration (a).

Work = Force × Displacement

⇒W = F.s = ma.s

It is given that mass of the dresser is, m = 250 kg

work done, W = 126 J

Force acting on the dresser, F = 14 N

we need to find displacement, s

⇒126 J = 14 N × s

⇒ s = 126 J/ 14 N = 9 m

Hence, Laurie is able to move the dresser to about 9 m.

8 0
3 years ago
Read 2 more answers
In about 5 billion years, at the end of its lifetime, our sun will end up as a white dwarf, having about the same mass as it doe
vitfil [10]
It is fine to use the equation given by Plitter, since we are told that the mass is about the same as it is now, and I seriously doubt the original question wants the student to go into relativistic effects, electron degeneracy pressure and magnetic effects that govern a real white dwarf star.
There is no need to make it unnecessarily complicated, when the question is set at high school level.  The question asks, given a particular radius, and a given mass, what will the density be (which in this case will be the average density).   To answer the question, one needs to know the mass of the sun (which is about 2×1030 Kg.  One needs to convert the diameter to a radius, and then calculate the spherical volume of the white dwarf.  Then one can use the formula given above, namely density=mass/volume
8 0
3 years ago
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