Complete Question:
A horizontal tube consists of a 7.0-cm-diameter pipe, that narrows to a 2.0-cm-diameter throat. In the pipe, the water pressure is twice atmospheric pressure and the water flows with a speed of 0.40 m/s. What is the pressure in the throat, assuming that the water behaves like an ideal fluid. The density of water is 1000 kg/m^3, and the atmospheric pressure is 1.01 x 10^5 Pa.
Answer:
1.9 atm is the pressure in the throat
Explanation:
First find velocity of water and then find the pressure using Bernoulli's Principle.
Feathers sharp ,teeth some of them , wings ,backbones
Answer:
1- The lank with the least slope will be the easiest to climb because it will require the least force.
2- All three paths will require the same energy as the work done will be the same in all three cases.
Explanation:
1- Work done W = Force x Displacement i.e. W = F × cosФ where 'Ф' is the angle between force and displacement. Smaller the angle least is the force required to climb. Hence the path with least slope will be easier to climb.
2- Since W = F × cosФ as the angle increase cos Ф decrease which means the slope is increase and consequently the force required also increases but the total work done remains the same. Hence the energy required to climb all three Lanks will be the same.
Answer:
4 and 6 are true
Explanation:
Let's analyze we use Gauss's law every situation presented
R1. False The sphere is insulating, so the entire charge is evenly distributed throughout the volume, but the sign of the charge does not change.
R2. False In a conductor the entire charge is on the surface, therefore the electric field inside is zero, in an insulating sphere the electric field as the charge is distributed the field is proportional to the charge inside the Gaussian surface
R.3. False in a metallic sphere the charge is on the surface, by gauss law, inside it there is no charge, or therefore there is no electric field
R4 True. The electric field is as if all the charge were at the origin and the field lines have the same direction of the radii of the sphere that are perpendicular to the surface
R5 False In a metallic sphere the entire charge is on the surface, so the field is zero inside, instead a point charge has a non-zero field
R6 True. The load is on the surface
Answer:
3.5
Explanation:
Mechanical advantage = force out / force in
MA = 350 N / 100 N
MA = 3.5