Sodium weights 0.968 so the density is equal to 968
Answer:
d) business intelligence
Explanation:
Business intelligence refers to applications and technologies that are used to gather, provide access to, and analyze data and information to support decision-making efforts. Business Intelligence uses technologies for the data analysis of business information to make strategic decision for enterprises. Common functions of business intelligence technologies include reporting, online analytical processing, analytics, data mining, process mining, complex event processing, business performance management, benchmarking, text mining, predictive analytics and prescriptive analytics.
Answer:
Blue Lighting
Explanation:
In order to make red look black, you must use blue light. The blue would be absorbed and there would be no red light to reflect.
Answer:
a) 269.23 N
b) Fr = 70.77 N
c) Work output = 5250 J
d) Work Input = 6630 J
e) Mechanical Advantage
- ideal mechanical advantage = 3.9
- Actual Mechanical Advantage = 3.09
Explanation:
a) In an ideal machine, all the work input is converted to work output.
Work output = F₀ × d₀ = 1050 × 5 = 5250 J
Work input = Fᵢ × dᵢ = 19.5 Fᵢ
19.5 Fᵢ = 5250
Fᵢ = 269.23 N
b) Real effort = 340 N
Since 269.23 N is the force required to lift the 1050 N load in this pulley system, the rest of the 340 N force services frictional forces.
Frictional force = 340 - 269.23 = 70.77 N
c) Output work = Work done by the load = F₀ × d₀ = 1050 × 5 = 5250 J
d) Input Work = Work done by the Effort = Fᵢ × dᵢ = 340 × 19.5 = 6630 J
e) Ideal Mechanical advantage = distance travelled by effort/distance travelled by load
ideal mechanical advantage = 19.5/5 = 3.9
Actual Mechanical Advantage = Load/Effort = 1050/340 = 3.09
Efficiency = Work output/Work input = 5250/6630 = 0.792
<span>Remember the definition of acceleration:
a = Δv / Δt, this is change in velocity per unit of time.
Note that a and v are in bold to mean that they are vectors.
1) a body traveling in a straight line and increasing in speed: RIGHT:
Acceleration is the change in velocity, either magnitude or direction or both. So, a body increasing in speed is accelerated.
2) a body traveling in a straight line and decreasing in speed: RIGTH
A decrease in speed is a change in velocity, so it means acceleration.
3) a body traveling in a straight line at constant speed: WRONG.
That body is not changing either direction or speed so its motion is not accelerated but uniform.
4) a body standing still : WRONG.
That body is not changind either direction or speed.
5) a body traveling at a constant speed and changing direction: RIGHT.
The change in direction means that the body is accelerated. The acceleration due to change in direction is named centripetal acceleration.
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