#physicsquestion — Public Fediverse posts

#PhysicsQuestion: in "A Brief History of Time," Hawking describes how matter particles emit force particles, the recoil changing their directory and the impact changing their target's. This makes sense for repulsive forces, but how does that translate to attractive forces?

#ParticlePhysics #physics #gravity #magnetics #science #ScienceQuestion #ScienceQuestions

#PhysicsQuestion: in "A Brief History of Time," Hawking describes how matter particles emit force particles, the recoil changing their directory and the impact changing their target's. This makes sense for repulsive forces, but how does that translate to attractive forces?

#ParticlePhysics #physics #gravity #magnetics #science #ScienceQuestion #ScienceQuestions

#PhysicsQuestion: in "A Brief History of Time," Hawking describes how matter particles emit force particles, the recoil changing their directory and the impact changing their target's. This makes sense for repulsive forces, but how does that translate to attractive forces?

#ParticlePhysics #physics #gravity #magnetics #science #ScienceQuestion #ScienceQuestions

#PhysicsQuestion: in "A Brief History of Time," Hawking describes how matter particles emit force particles, the recoil changing their directory and the impact changing their target's. This makes sense for repulsive forces, but how does that translate to attractive forces?

#ParticlePhysics #physics #gravity #magnetics #science #ScienceQuestion #ScienceQuestions

#PhysicsQuestion: in "A Brief History of Time," Hawking describes how matter particles emit force particles, the recoil changing their directory and the impact changing their target's. This makes sense for repulsive forces, but how does that translate to attractive forces?

#ParticlePhysics #physics #gravity #magnetics #science #ScienceQuestion #ScienceQuestions

Question: What is the derivative of the Lagrangian (of what system I don't particularly care right now) with respect to entropy (or to the time derivative of entropy)? Is this even a sensible question? Can we use the Euler-Lagrange equation for entropy?

#lagrangian #lagrangianMechanics #physics #physicsQuestion #entropy #eulerLagrangeEquation #eulerLagrangeEquations

Question: What is the derivative of the Lagrangian (of what system I don't particularly care right now) with respect to entropy (or to the time derivative of entropy)? Is this even a sensible question? Can we use the Euler-Lagrange equation for entropy?

#lagrangian #lagrangianMechanics #physics #physicsQuestion #entropy #eulerLagrangeEquation #eulerLagrangeEquations

Question: What is the derivative of the Lagrangian (of what system I don't particularly care right now) with respect to entropy (or to the time derivative of entropy)? Is this even a sensible question? Can we use the Euler-Lagrange equation for entropy?

#lagrangian #lagrangianMechanics #physics #physicsQuestion #entropy #eulerLagrangeEquation #eulerLagrangeEquations

Question: What is the derivative of the Lagrangian (of what system I don't particularly care right now) with respect to entropy (or to the time derivative of entropy)? Is this even a sensible question? Can we use the Euler-Lagrange equation for entropy?

#lagrangian #lagrangianMechanics #physics #physicsQuestion #entropy #eulerLagrangeEquation #eulerLagrangeEquations

Question: What is the derivative of the Lagrangian (of what system I don't particularly care right now) with respect to entropy (or to the time derivative of entropy)? Is this even a sensible question? Can we use the Euler-Lagrange equation for entropy?

#lagrangian #lagrangianMechanics #physics #physicsQuestion #entropy #eulerLagrangeEquation #eulerLagrangeEquations

Turns out infrared thermometers don't get the temperature of water right.
Alerted to this when dying a shirt.
IR thermometer said 85°C - while I wondered why the water was gently bubbling.
Digging out a mercury thermometer revealed why - it was at simmering at 100°C.

The shirt still seems to have dyed okay.

Any physicist care to explain?
#PhysicsMastodon
#PhysicsQuestion
#IRThermometer
#TheNeedForPurple

Turns out infrared thermometers don't get the temperature of water right.
Alerted to this when dying a shirt.
IR thermometer said 85°C - while I wondered why the water was gently bubbling.
Digging out a mercury thermometer revealed why - it was at simmering at 100°C.

The shirt still seems to have dyed okay.

Any physicist care to explain?
#PhysicsMastodon
#PhysicsQuestion
#IRThermometer
#TheNeedForPurple

Turns out infrared thermometers don't get the temperature of water right.
Alerted to this when dying a shirt.
IR thermometer said 85°C - while I wondered why the water was gently bubbling.
Digging out a mercury thermometer revealed why - it was at simmering at 100°C.

The shirt still seems to have dyed okay.

Any physicist care to explain?
#PhysicsMastodon
#PhysicsQuestion
#IRThermometer
#TheNeedForPurple

Turns out infrared thermometers don't get the temperature of water right.
Alerted to this when dying a shirt.
IR thermometer said 85°C - while I wondered why the water was gently bubbling.
Digging out a mercury thermometer revealed why - it was at simmering at 100°C.

The shirt still seems to have dyed okay.

Any physicist care to explain?
#PhysicsMastodon
#PhysicsQuestion
#IRThermometer
#TheNeedForPurple

@gmusser Consider using a hashtag like #physics or #physicsquestion

Physics friends: When you fill a water bottle from a tap quickly, there’s an audible frequency sweep (to higher frequencies). Why? Can you write an equation for it? #physics #PhysicsQuestion