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4 years ago

When the forces on an object have a net force of zero ( the object is still or going constant speed ).

Physics

1 answer:

nasty-shy [4]4 years ago

7 0

Answer:

the object is still

Explanation:

You need a stronger force than the opposing force to move an object.

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If an otherwise empty pressure cooker is filled with air of room temperature and then placed on a hot stove, what would be the m

Xelga [282]

Answer:

The magnitude of the net force F₁₂₀ on the lid when the air inside the cooker has been heated to 120 °C is $\frac{135.9}{A}N$

Explanation:

Here we have

Initial temperature of air T₁ = 20 °C = ‪293.15 K

Final temperature of air T₁ = 120 °C = 393.15 K

Initial pressure P₁ = 1 atm = ‪101325 Pa

Final pressure P₂ = Required

Area = A

Therefore we have for the pressure cooker, the volume is constant that is does not change

By Chales law

P₁/T₁ = P₂/T₂

P₂ = T₂×P₁/T₁ = 393.15 K× (‪101325 Pa/‪293.15 K) = ‭135,889.22 Pa

∴ P₂ = 135.88922 KPa = 135.9 kPa

Where Force = $\frac{Pressure}{Area}$ we have

Force = $F_{120}=\frac{135.9}{A}N$ .

4 0

4 years ago

What liquid is the universal solvent?

mafiozo [28]

A. water is the universal solvent.

3 0

3 years ago

Read 2 more answers

A basketball player jumps straight upward. After 0,625 s, she is 0.441 m above the ground. What is her initial velocity?????????

Lunna [17]

Answer:

v₀ = 3.77 [m/s]

Explanation:

This problem can be solved in a simple way by means of the following equation of kinematics.

$y=y_{o}+v_{o}*t+\frac{1}{2}*g*t^{2}$

where:

y - yo = 0.441 [m]

Vo = initial velocity [m/s]

g = gravity acceleration = 9.81 [m/s²]

t = time = 0.625 [s]

$0.441 = v_{o}*(0.625)-\frac{1}{2} *9.81*(0.625)^{2} \\2.357 = v_{o}*0.625\\v_{o}=3.77[m/s]$

Note: The sign of the acceleration is negative since the movement of the basketball player is against of the gravity acceleration.

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3 years ago

What is required for an electromagnet to produce a magnetic field that is

jek_recluse [69]

Answer:

A. A coil of wire with current running through it

3 0

3 years ago

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In the roman soldier model for refraction, a muddy stream crosses the road they are on walking on at 45. Will the soldiers in th

Mamont248 [21]

There are different refractive errors that are common and some of them are:

Nearsightedness (myopia) makes far-away objects look blurry.
Farsightedness (hyperopia) makes nearby objects look blurry.
Astigmatism can make far-away and nearby objects look blurry or distorted.
Presbyopia makes it hard for middle-aged and older adults to see things up close

<h3>What is Refraction?</h3>

This refers to the study of light phenomena that deflects when it passes through a medium in an oblique manner to another medium of a varying density.

Hence, we can see that there are everyday examples of refraction in simple terms which occurs and some of them are:

Glass
Human eyes
Ice crystals
Pickle jar
Microscope, etc.

Hence, we can see that your question is incomplete, so I gave you a general overview to help you get a better understanding of the concept of refraction.