# Search results

1. ### Will the torque for this force = 0

torque about axis of rotation of the door left side
2. ### Will the torque for this force = 0

https://ibb.co/drnjDG will the torque for this force = 0 explain according to the torque relation
3. ### Mass difinition and protons

thank you sir
4. ### Mass difinition and protons

my question is Does 1 kg of iron contain the same number of protons as 1kg of aluminium,hydrogen and wood Can we define mass of matter with no of protons and neutrons it contains?
5. ### Embarassing question- Displacement equation

you must take in consideration difference between Average velocity and Instantaneous velocity x = vt v is average velocity x= 1/2* (V0 + V )t now v is velocity at time t
6. ### Question about atmosphere pressure

we define the ATM. pressure as the weight of cylinder of air above the earth with surface area for its base equal 1 m2 referring to this definition how could we illustrate the pressure at 1- a room with roof . 2- a room without roof . 3- vacuum room.
7. ### Momentum and kinetic energy

that's now clear thank you
8. ### Electric current

we know that electric current result of motion of electrons through aconductor and resistance result of electron's collisions with matter's nuclei resulting in heating material my question is what is the effect of positive electric field of nuclei at the motion of negative electrons ...
9. ### Strange behavior of the density of the water around the freezing point

yes sir thats exactly what i meant but i want to know with more diagramatic illustration the effect of molecule's shape on this behaviour i thought that such basic phenomena had a lot of discussion in previous threads
10. ### Strange behavior of the density of the water around the freezing point

i meant with strange behavior that water contradicts the role of decreasing density due to increasing temperatur at a range from 0 c degree to 4 c degree
11. ### Strange behavior of the density of the water around the freezing point

please is there a topic that discuss with illustration factor that causes Strange behavior of the density of the water around the freezing point
12. ### Momentum and kinetic energy

why although the equations of momentum and kinetic energy of an object contains the same symbols m and v we note in an inelastic collision that momentum unlike the kinetic energy is conserved

thank you
14. ### Misunderstanding about work definition

as scientists defines it work is the product of force and displacement i just want to ask is the displacement meusured during force application or during motion even if the force removed thank you
15. ### Perplexing question regarding the relationship temperature of the Earth in orbit arou

thank you mr dave and mr russ i have understood from the link that the water-land distriputions between north and south earth hemispheres make the earth as awhole cooler in jan and hotter in jul
16. ### Perplexing question regarding the relationship temperature of the Earth in orbit arou

thank you sir very much i have realy benfited of your guiding informations
17. ### Perplexing question regarding the relationship temperature of the Earth in orbit arou

We know that the earth revolves around the sun in an oval orbit the sun occupies one of its centers On this basis, the distance from the sun is not constant and the land closest to the sun in Maicon on Jan. 3 and and be further from the sun on July 4, the difference between the two points...