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Physics Science

01/14/24

Does a solid, like a night stand, vibrate macroscopically because the atoms and molecules that make up the solid vibrate?

We know particles that make up solids vibrate, but do the solids vibrate themselves because of that? Like a structure or object like a night stand, does that night stand vibrate macroscopically... more

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Physics

01/14/24

The reading on the voltmeter, V, takes the following values: V=6.0V when R=2.0Ω and V=8.0V when R=4.0Ω, Claculate internal resistance for parallel circuit

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Physics

01/13/24

orbital velocity vs velocity

orbital velocity is sqrt GM/d, velocity is 2pir/T, what is the difference?

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Physics

01/13/24

difference between g as acceleration in space and centripetal acceleration in space?

g= GM/r^2, ac= v^2/r. do they both give acceleration? What is the difference between these two?

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Physics Math Physical Science Mechanical Engineering

01/12/24

Angular momentum of a rigid body physics problem

I came across this task on a website and have been curious about its solution, but I’m having trouble figuring it out:A cube with side edges d=2m, with homogeneous mass distribution, slides with... more

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Physics Science

01/12/24

Do solid objects or structures vibrate as a whole macroscopically?

I know particles vibrate in a solid microscopically, but the solid object itself does not vibrate right? Does the microscopic vibrations cause the solid object to vibrate macroscopically?

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Physics

01/11/24

If you weigh 1176 N on Earth where the acceleration due to gravity is 9.8 m/s^2 , what is your weight on Uranus where the acceleration due to gravity is 8.69 m/s^2?

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Physics Math Science Physical Science

01/11/24

Interesting friction physics problem

The following task was discussed on an internet site, and I also became curious about its solution, but I simply can't figure it out: On a horizontal, rough table, the coefficient of sliding... more

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Physics Science Physical Science Electrical Engineering

01/11/24

Variable capacitor

I came across an interesting task in a post:A variable capacitor, whose initial capacity is C, is charged to a voltage U and then short-circuited through a resistor R.1. Determine the ratio of the... more

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Physics

01/10/24

Earth orbits the sun once every 365.25 days. Find the average angular speed of Earth about the sun. Answer in units of rad/s.

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Physics

01/10/24

What is her average angular acceleration during this time interval? Answer in units of rad/s 2 .

A figure skater begins spinning counterclockwise at an angular speed of 4.4 π rad/s. During a 4.0 s interval, she slowly pulls her arms inward and finally spins at 9.0 π rad/s. What is her average... more

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Physics

01/10/24

Find the number of revolutions the tire makes during this motion, assuming no slipping. Answer in units of rev.

A car accelerates uniformly from rest and reaches a speed of 23.9 m/s in 13.6 s. The diameter of a tire is 88.7 cm. Find the number of revolutions the tire makes during this motion, assuming no... more

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Physics

01/09/24

Does the particles in a solid object vibrate or does the solid object itself vibrate?

Solid objects do not vibrate. (That we can see and/or feel and/or hear. However, molecules inside a solid vibrate. Does this mean the solid structure or object itself vibrates or just the particles... more

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Physics

01/08/24

Do solid structures or objects vibrate or just the particles that make up the solids/structures?

Solid objects do not vibrate. (That we can see and/or feel and/or hear. However, molecules inside a solid vibrate. Does this mean the solid structure or object itself vibrates or just the particles... more

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Physics

01/06/24

A force of 10.0 newtons acts at an angle 20.0 degrees from vertical. What are the horizontal and vertical components of the force?

A. The horizontal component is 10.1 newtons, and the vertical component is 0 newtons. B. The horizontal component is 3.42 newtons, and the vertical component is 9.39 newtons. C. The horizontal... more

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Physics Chemistry Biochemistry Usmle

01/02/24

An ________ particle is a helium nucleus, consisting of 2 protons and 2 neutrons (without the electrons).

Fill in the statement:An ________ particle is a helium nucleus, consisting of 2 protons and 2 neutrons (without the electrons).A. BetaB. AlphaC. OmegaD. Positron

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Physics

12/26/23

Can you explain why Pressure is inversely proportional to velocity without using the bernoulli's equation?

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Physics Math Calculus Geometry

12/26/23

Find the surface area of revolution about the x-axis of y=6x+6 over the interval 0 <= x <= 2

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Physics Math Calculus Geometry

12/25/23

Use cylindrical shells to find the volume of the solid obtained by rotating the region bounded by y=x^2 , y=0, and x=3, about the y-axis.

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Physics

12/21/23

I have a question:

Two liquids of densities ρ1 and ρ2 (ρ2 = 2ρ1) are filled up behind a square wall of side 10 m. Each liquid has a height of 5 m. The ratio of the forces due to these liquids exerted on upper part MN... more

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Physics

12/21/23

What does this sentence mean?- liquid surface is always perpendicular to the net force

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Physics

12/20/23

What are the three primary colors?

Many people would say red, blue, and yellow. But did you know that those are only how we see them? In reality, the true primary colors are red, blue, and green! Our eyes need yellow pigment in... more

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Physics Calculus

12/20/23

Non-Constant Acceleration of a Car Drag Racing on a Quarter Mile Track. What am I doing wrong?

I'm a retired engineer and my hobby is racing my Cadillac at the local quarter mile track. Being a numbers geek by training I decided to write an Excel program that could take my time slip and spit... more

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Physics Math Calculus

12/19/23

The velocity of a particle moving along a line is a function of time given by v(t) = 88 / (t^2 +9t +8). Find the distance that the particle has traveled after t=7 seconds if it started at t=0 seconds.

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Physics Math Calculus

12/18/23

The velocity of a particle moving along a line is a function of time given by v(t) = 72 / (t^2 + 12t + 35). Find the distance that the particle has traveled after t=8 seconds if it started at t=0 secs

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Answers •1

Does a solid, like a night stand, vibrate macroscopically because the atoms and molecules that make up the solid vibrate?

The reading on the voltmeter, V, takes the following values: V=6.0V when R=2.0Ω and V=8.0V when R=4.0Ω, Claculate internal resistance for parallel circuit

orbital velocity vs velocity

difference between g as acceleration in space and centripetal acceleration in space?

Angular momentum of a rigid body physics problem

Do solid objects or structures vibrate as a whole macroscopically?

If you weigh 1176 N on Earth where the acceleration due to gravity is 9.8 m/s^2 , what is your weight on Uranus where the acceleration due to gravity is 8.69 m/s^2?

Interesting friction physics problem

Variable capacitor

Earth orbits the sun once every 365.25 days. Find the average angular speed of Earth about the sun. Answer in units of rad/s.

What is her average angular acceleration during this time interval? Answer in units of rad/s 2 .

Find the number of revolutions the tire makes during this motion, assuming no slipping. Answer in units of rev.

Does the particles in a solid object vibrate or does the solid object itself vibrate?

Do solid structures or objects vibrate or just the particles that make up the solids/structures?

A force of 10.0 newtons acts at an angle 20.0 degrees from vertical. What are the horizontal and vertical components of the force?

An ________ particle is a helium nucleus, consisting of 2 protons and 2 neutrons (without the electrons).

Can you explain why Pressure is inversely proportional to velocity without using the bernoulli's equation?

Find the surface area of revolution about the x-axis of y=6x+6 over the interval 0 <= x <= 2

Use cylindrical shells to find the volume of the solid obtained by rotating the region bounded by y=x^2 , y=0, and x=3, about the y-axis.

I have a question:

What does this sentence mean?- liquid surface is always perpendicular to the net force

What are the three primary colors?

Non-Constant Acceleration of a Car Drag Racing on a Quarter Mile Track. What am I doing wrong?

The velocity of a particle moving along a line is a function of time given by v(t) = 88 / (t^2 +9t +8). Find the distance that the particle has traveled after t=7 seconds if it started at t=0 seconds.

The velocity of a particle moving along a line is a function of time given by v(t) = 72 / (t^2 + 12t + 35). Find the distance that the particle has traveled after t=8 seconds if it started at t=0 secs

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