원형 튜브 AB는 한쪽 끝에는 고정되고 다른 쪽 끝에는 자유롭다. 관은 조인트 B에서 축력을 받는다. 튜브 외경이 75mm이고 두께가 19mm인 경우 튜브의 최대 정상 응력을 계산합니다. (B위치에서 아래방향으로 13kn힘이 작용하고 있다,)

Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. the electric field at a point p, which is 0.50 m from the center of the sphere, is 15,000 n/c and is directed radially outward. what is the maximum magnitude of the electric field due to this sphere

The air that we breath is made mostly of which gaseous molecule

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.