Answer:
The weight is 18.75 KN/m³ that means
weight = 18750 N/m³
and mass = 1911 kg
Answer:
The correct answer is c. object snap
Explanation:
In Autocad, the object snap is defined as a drawing aid that is used together with other different commands to help to draw accurately. It also allows snapping onto a specific object location when there is a picking point. and thus, it helps to select the center of a line.
The question is incomplete. The complete question is :
The hydrofoil boat has an A-36 steel propeller shaft that is 100 ft long. It is connected to an in-line diesel engine that delivers a maximum power of 2590 hp and causes the shaft to rotate at 1700 rpm . If the outer diameter of the shaft is 8 in. and the wall thickness is
in.
A) Determine the maximum shear stress developed in the shaft.
= ?
B) Also, what is the "wind up," or angle of twist in the shaft at full power?
= ?
Solution :
Given :
Angular speed, ω = 1700 rpm


Power 
= 1424500 ft. lb/s
Torque, 

= 8001.27 lb.ft
A). Therefore, maximum shear stress is given by :
Applying the torsion formula


= 2.93 ksi
B). Angle of twist :


= 0.08002 rad
= 4.58°
Answer:
2.83 kg
Explanation:
Given:
Volume, V = 0.8 m³
gage pressure, P = 200 kPa
Absolute pressure = gage pressure + Atmospheric pressure
= 200 + 101 = 301 kPa = 301 × 10³ N/m²
Temperature, T = 23° C = 23 + 273 = 296 K
Now,
From the ideal gas equation
PV = mRT
Where,
m is the mass
R is the ideal gas constant = 287 J/Kg K. (for air)
thus,
301 × 10³ × 0.8 = m × 287 × 296
or
m = 2.83 kg