Answer:
0.0003758 m²
Explanation:
The formula to apply is;
ΔL=1/Y *F/A*L₀
Where ΔL=change in length = 0.412 in
Y=modulus of elasticity=30000000 psi
change psi to Pa
1 psi= 6.894757 kPa
30000000=?
6.894757 *30,000,000 =206842710000 Pa
F=applied force = 12000 lb---change to Newtons
1 lb=4.4482189159 N
12000 lb=? 12000*4.4482189159 =53378.6 N
A=cross-sectional area=?
L₀=original length of the rod= 50 ft ----change to meters
1ft =0.3048
50 ft=50*0.3048=15.24 m
ΔL =0.412 in -----change to meters
1 in =0.0254
0.412 in =? 0.412*0.0254 =0.0104648 m
Applying the formula
ΔL=1/Y *F/A*L₀
0.0104648 =1/206842710000 *(53378.6/A)*15.24
142031994.2=53378.6/A
A=53378.6/142031994.2
A=0.0003758 m²
Answer:
For SGID you type this
$ find . -perm /4000
For SUID you type this
$ find . -perm /2000
Explanation:
Auxiliary file permissions, that are commonly referred to as “special permissions” in Linux are needed in order to easily find files which have SUID (Setuid) and SGID (Setgid) set.
After typing
$ find directory -perm /permissions
Then type the commands in the attachment below to obtain a list of these files with SGID and SUID.
Answer:
Randomized Control Trial (RCT)
Explanation:
A Randomized Control Trial (RCT) study is a type of scientific study method, especially used in medical studies, where the subjects of the study are randomly assigned to two groups (Test and control groups). The test groups receive a medical intervention whose effect is to be studied, while the control group receives a placebo (a substance that is inert and has no therapeutic value). Notably in this study design is that apart from the medical intervention of interest, every other variable such as age, sex, race, etc. is controlled (the same across all the groups), to reduce the occurrence of biases, and this is to ensure that the difference in the outcomes between the test and control groups are as a result of the variable of interest alone. Randomization is also critical because it helps reduce recruitment bias and mimics natural occurrence as much as possible.
Answer:A
Explanation:
Damp roof is generally applied at basement level which restrict the movement of moisture through walls and floors. Therefore it could be inside or the outside basement walls.
Answer:
Technician B only.
Explanation:
It is not necessary that all electric motors will use Direct current, some may also use Alternative current. Some electric motors that use DC may use brushes. There are two types of brushless motors that use alternative current.