Answer:
b
Explanation:
Answer:
Rangeland management specialists protect the land, while conservation biologists protect wildlife and its environment.
Explanation:
Which of the following explains why truck drivers are required to take a rest period after a certain period of driving?
Drivers get cash bonuses for resting at eight-hour intervals.
Rest periods cut down on the number of gas emissions in the atmosphere.
Their trucks need sufficient time between rides to cool down and not overheat.
Rest periods prevent accidents caused by lack of sleep.
Answer:
Rest periods prevent accidents caused by lack of sleep
What are the main factors contributing to the generation of heat in resistance welding (ideally explain based on equation)
Answer:
Q=I^2Rt
Explanation:
The principle of resistance welding is the Joule heating law where the heat Q is generated depending on three basic factors as expressed in the following formula
Q=I^2Rt
I is the current passing through the metal combination
R is the resistance of the base metals and the contact interfaces
t is the duration/time of the current flow.
Calculate the magnitude of the velocity and the θ angular direction of the block and the bullet together when the 50 g bullet moves to sky at a speed of 600 m/s and hits a sliding 4 kg block with a speed of 12 m/s in a direction with 30o with respect to ground.
Answer:
Magnitude of the velocity = 16.82 m/s
Angular direction, θ = 52.41°
Explanation:
As given ,
mass of bullet, m₁= 50g = 0.05 kg
speed of bullet , u₁ = 600 m/s
mass of the block , m₂ = 4 kg
speed of the block before collision , u₂ = 12 m/s
direction , θ = 30°
Now,
Assume that the combined velocity of bullet and block after collision = v
and the direction = θ
Now, from the conservation of momentum in x - direction :
m₁ u₁ + m₂ u₂ = ( m₁ + m₂ ) vₓ
where v = final velocity after collision
u₁ = initial velocity of bullet before collision = 0
m₁ = mass of the bullet before collision = 0.05 kg
u₂ = velocity of block before collision = 12 cos(30° )
m₂ = mass of block before collision
m₁ + m₂ = combined mass of bullet and block after collision = 0.05 + 4
∴ we get
0.05 (0) + 4(12 cos(30° ) ) = ( 0.05 + 4 ) vₓ
⇒ 0 + 4(6√3) = 4.05 vₓ
⇒24√3 = 4.05 vₓ
⇒vₓ = 10.26 m/s
Now, from the conservation of momentum in y - direction :
m₁ u₁ + m₂ u₂ = ( m₁ + m₂ ) [tex]v_{y}[/tex]
where v = final velocity after collision
u₁= initial velocity of bullet before collision = 600
m₁ = mass of the bullet before collision = 0.05 kg
u₂ = velocity of block before collision = 12 sin(30° )
m₂= mass of block before collision
m₁+ m₂= combined mass of bullet and block after collision = 0.05 + 4
∴ we get
0.05 (600) + 4(12 sin(30° ) ) = ( 0.05 + 4 ) [tex]v_{y}[/tex]
⇒ 30 + 4(6) = 4.05 [tex]v_{y}[/tex]
⇒30 +24 = 4.05 [tex]v_{y}[/tex]
⇒54 = 4.05 [tex]v_{y}[/tex]
⇒[tex]v_{y}[/tex] = 13.33 m/s
Now, the magnitude of the velocity = √vₓ² + [tex]v_{y}[/tex]² = √(10.26)² + (13.33)²
= √105.26 + 177.68
= √282.95 = 16.82
The angular direction, θ = [tex]tan^{-1}[/tex]([tex]\frac{v_{y} }{v_{x} }[/tex]) = [tex]tan^{-1}[/tex]([tex]\frac{13.33}{10.26}[/tex]) = [tex]tan^{-1}[/tex](1.299) = 52.41°
(,,)=^3−^3+^3, where is the sphere ^2 + ^2 + ^2=^
Use divergence theorem to find flux of F. is in outward orientation.
Answer:
The flux of F in the outward orientation is equal to 0.
General Formulas and Concepts:
Calculus
Differentiation
DerivativesDerivative NotationIntegration
IntegralsMultivariable Calculus
Partial Derivatives
Vector Calculus (Line Integrals)
Del (Operator):
[tex]\displaystyle \nabla = \hat{\i} \frac{\partial}{\partial x} + \hat{\j} \frac{\partial}{\partial y} + \hat{\text{k}} \frac{\partial}{\partial z}[/tex]
Div
[tex]\displaystyle \text{div \bf{F}} = \nabla \cdot \textbf{F}[/tex]Divergence Theorem:
[tex]\displaystyle \iint_S {\big( \nabla \times \textbf{F} \big) \cdot \textbf{n}} \, d\sigma = \iiint_D {\nabla \cdot \textbf{F}} \, dV[/tex]
Explanation:
*Note:
Your question is incomplete, but I have defined the portions of the questions that were missing below.
Step 1: Define
Identify given.
[tex]\displaystyle \textbf{F}(x, y, z) = z^3 \hat{\i} - x^3 \hat{\j} + y^3 \hat{\text{k}}[/tex]
[tex]\displaystyle \text{Region:} \{ \ \text{Sphere: } x^2 + y^2 + z^2 = a^2 \ \}[/tex]
Step 2: Integrate Pt. 1
Find div F:Step 3: Integrate Pt. 2
We can evaluate the Divergence Theorem integral pretty easily:
[tex]\displaystyle \begin{aligned}\iiint_D {0} \, dV & = \iint_D {0} \, dV \\& = \int_D {0} \, dV \\& = \boxed{0}\end{aligned}[/tex]
∴ [tex]\displaystyle \Phi = 0[/tex]
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Topic: Multivariable Calculus
Unit: Stokes' Theorem and Divergence Theorem
What happens if the TEV bulb loses its charge?
Answer:
When a loss of charge exists, There is not a sufficient force to throttle the value open to it's correct position.
Which of the following hazards is shared by surface mining and sub-surface mining?
rabid bats
mine collapse
poor air quality
hazardous chemicals
B I guess. since they both have potential to collapse
Answer: Hazardous chemicals
Explanation:
true or false: don't break or crush mercury-containing lamps because mercury powder may be released?
Answer:
true
Explanation:
don't break or crush mercury-containing lamps because mercury powder may be released?- true
i need help with this assignment.
Answer:
Mortgage/rent.
Homeowners or renters insurance.
Property tax (if not already included in the mortgage payment).
Auto insurance.
Health insurance.
Out-of-pocket medical costs.
Life insurance.
Electricity and natural gas.
Explanation:
What is an example of an appropriate element to consider when evaluating a game review? Select one: a. Do I like the personality of the game reviewer? b. Did the reviewer agree with my personal opinion about the game? c. What are the most important factors to this reviewer? d. Is the reviewer an intelligent person?
Answer:
c. What are the most important factors to this reviewer?
Explanation:
When evaluating a game, there are certain factors that a good reviewer should have in mind. These factors would serve as a guide as he writes the review. First and foremost, he should dedicate his time to play the game and then consider factors such as;
graphicsplayabilitysoundFactoring these important aspects of the game would help him to make a quality review.
The tool life decreases from 0.8 min to 0.2 min due to the increase in cutting speed from 60 m/min to 120 m/min in a turning operation.
Compute is the value of the cutting speed at 0.4 min.
a-)Determine the spindle speed in rpm.
b-)Find the required power for the unit force.
c-)The friction between tool and workpiece varies 0.25-0.35 during the process.
d-)Calculate the rate of maximum force to minimum force.
Answer:
The value of the cutting speed = 84.85 m/min
a.)The value of the spindle speed = 270.08 rpm
b.)The value of the Power for the unit force = 1.414 W
c.)[tex]u_{max}[/tex] = 0.35, [tex]u_{min}[/tex] = 0.25
d.)The rate of maximum force to minimum force = 1.4
Explanation:
As given, T₁ = 0.8 min
T₂ = 0.2 min
V₁ = 60 m/min
V₂ = 120 m/min
Now, as we know that Taylor's tool life equation -
VTⁿ = k
where V = speed in m/min
T = time in min
n = Index
k = constant
Now,
V₁T₁ⁿ = V₂T₂ⁿ
⇒60 (0.8)ⁿ = 120(0.2)ⁿ
⇒ (0.8)ⁿ = 2(0.2)ⁿ
⇒ ([tex]\frac{0.8}{0.2}[/tex] )ⁿ = 2
⇒4ⁿ = 2
Taking log both side , we get
⇒n log(4) = log(2)
⇒n = [tex]\frac{log(2)}{log(4)}[/tex] = 0.5
Now,
As given , T = 0.4 min
We know,
VTⁿ = V₁T₁ⁿ
⇒V (0.4)ⁿ = 60(0.8)ⁿ
⇒V = 60([tex]\frac{0.8}{0.4}[/tex] )ⁿ
⇒V = 60(2)ⁿ
⇒V = 60([tex]2^{0.5}[/tex])
⇒V = 84.85 m/min
∴ The value of the cutting speed = 84.85 m/min
a.)
As we know ,
V = π×d×N
Let d = 100 mm = 0.1 m
⇒ 84.85 = π×0.1×N
⇒ N = [tex]\frac{84.85}{0.1\pi } = 270.08[/tex] rpm
∴ The value of the spindle speed = 270.08 rpm
b.)
As we know,
P = F×V
⇒P = 1×[tex]\frac{84.85}{60} = 1.414[/tex] W per unit force
∴ The value of the Power for the unit force = 1.414 W
c.)
As given - The friction between tool and workpiece varies 0.25-0.35 during the process.
⇒[tex]u_{max}[/tex] = 0.35
[tex]u_{min}[/tex] = 0.25
d.)
Rate of maximum force , [tex]F_{max}[/tex] = [tex]u_{max}[/tex] × Normal force
Rate of minimum force , [tex]F_{min}[/tex] = [tex]u_{min}[/tex] × Normal force
∴ we get
[tex]\frac{F_{max} }{F_{min} } = \frac{u_{max} }{u_{min} } = \frac{0.35}{0.25}[/tex] = 1.4
∴ we get
The rate of maximum force to minimum force = 1.4
10. Atmospheric scientists study weather patterns.
True
False
Answer:
True
Explanation:
Atmospheric science is studying of the Earth's atmosphere. Meteorology includes atmospheric chemistry and atmospheric physics with a major focus on weather forecasting.
Answer:
The other person is Correct the answer is true
Explanation:
.. You should
an eyewash station periodically.
A)
Remove
B) O Paint
C) Inspect
DO Move
Answer:
C.
Explanation:
You want to make sure it still works. You don't want to move it periodically though in case of an emergency.
Which component found in fertilizer is a known cancer-causing agent?
ammonia
nitrites
phosphorous
zinc
Answer:
B Nitrites
Explanation:
The correct answer is nitrites. Nitrites can cause cancer when humans have reached a certain level of exposure.
Answer: The correct answer is nitrites
Explanation: This answer has been confirmed correct.
The inclusion of nitrites in fertilizer makes it a risk as a carcinogen (hence the product warning labels).
4. Employees are not responsible for thelr own safety whlle at work.
A) O True
B) O False
The statement "Employees are not responsible for their own safety while at work" is false because Employees most certainly are responsible.
What is Occupational safety?A multidisciplinary discipline dealing with the safety, health, and welfare of individuals at work is known as occupational safety and health, often known as occupational health and safety, occupational health, or occupational safety.
An environment that is safe and healthy for workers may minimize injury and sickness expenses, lower levels of absenteeism, boost output and quality, and improve employee morale. In other words, safety benefits the business.
Thus, the statement "Employees are not responsible for their own safety while at work" is false because Employees most certainly are responsible.
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in multi-grade oil what is W means?
Answer:
winter viscosity grades
Explanation:
The “W”/winter viscosity grades describe the oil's viscosity under cold temperature engine starting conditions. There's a Low Temperature Cranking Viscosity which sets a viscosity requirement at various low temperatures to ensure that the oil isn't too thick so that the starter motor can't crank the engine over.
A square rod is 2 m long and 0.5 m by 0.5 m in cross section. It elongates by 0.5 mm when subject to a tensile load P. The normal longitudinal strain is most nearly:_____
Answer: the normal longitudinal strain is most nearly 2.5 x 10⁻⁴ mm/mm
Explanation:
Given the data in the question,
we know that;
Normal longitudinal strain = elongation / original length
so we substitute our values
Normal longitudinal strain = 0.5 mm / (2 m x 1000) mm
= 0.5 mm / 2000 mm
= 2.5 x 10⁻⁴ mm/mm
Therefore the normal longitudinal strain is most nearly 2.5 x 10⁻⁴ mm/mm
increases as
Complete the sentence. As division of labor increases,
well.
A. voluntary exchange
B. opportunity cost
C. specialization
D. physical capital
Answer: C... Specialization
Explanation:
Increases as Complete the sentence. As division of labor increases, specialization.
What is Labor?The procedure by which the placenta and fetus depart the uterus is called labor. Vaginal delivery (via the birth canal) and cesarean delivery (surgery) are the two possible methods of delivery.
In order for the fetus to pass through the birth canal, the cervix must first open (dilate) and thin (efface) during a series of ongoing, progressive contractions of the uterus called labor.
The Fair Labor Standards Act (FLSA) specifies requirements for minimum wage, overtime compensation, recordkeeping, and youth employment that are applicable to workers in the private sector and in federal, state, and municipal governments.
Typically, two weeks before or after the anticipated birth date, labor begins. Nobody, however, is entirely sure what starts labor.
Therefore, Increases as Complete the sentence. As division of labor increases, specialization.
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Which of the following explains the difference between conservation and preservation?
Conservation is the management of habitats; preservation is the management of resources.
Conservation is the management of renewable resources; preservation is the management of nonrenewable resources.
Conservation is the practice of managing resources; preservation is the act of keeping resources undamaged.
Conservation is the act of keeping resources undamaged; preservation is the practice of managing resources.
Answer:
b
Explanation:
Answer: The correct answer is Conservation is the practice of managing resources; preservation is the act of keeping resources undamaged.
Explanation: This answer has been confirmed as correct.
20. The preferred method for applying the field excitation voltage uses a field relay which operates on the
principle of
Ar speed application
B. time application
C. thermal application
D. angle application
