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Mars2501 [29]
3 years ago
13

The student makes a single pile of the 500 sheets of paper. Which a metre rule, she measured the height of the pile. The height

of the pile is 0.048 m. Calculate the density of the paper.

Physics
1 answer:
Cerrena [4.2K]3 years ago
6 0

Answer:  please see attached work.

Explanation:  please see attached work.  Assuming 500 sheets of paper = 20 lb.  (typicical value).  

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When measuring accelerations with three different graphs (x-t, v-t, a-t) which gives the most reliable results and why?
kipiarov [429]

Answer:

the best graph to find the acceleration is v-t since calculating the slope averages the different experimental errors.

Explanation:

The different graphics depending on time give various information, let's examine what we can get from some

Graph of x -t. from this graph we can obtain the speed through the slope, but the acceleration is not directly obtainable

v-t chart. We can get the acceleration not through the slope and the distance traveled by the area under the curve. Obtaining acceleration is very accurate since it is an average that avoids possible errors in measurements. This is the best graph to find the acceleration

Graph of a-t In this graph the acceleration is a point on the Y axis, it gives some errors because it depends strongly on the possible experimental errors.

In conclusion, the best graph to find the acceleration is v-t since calculating the slope averages the different experimental errors.

5 0
3 years ago
According to the Declaration, when do people have a right to revolution?
babunello [35]
Locke said that under natural law, all people have the right to life, liberty, and private property; under the social contract, the people could instigate a revolution against the government when it acted against the interests of citizens, to replace the government with one that served the interests of citizens.
3 0
2 years ago
A 120 W lightbulb and a 90 W lightbulb each operate at a voltage of 120 V. Part A Which bulb carries more current? Which bulb ca
uysha [10]

Answer:

120 W lightbulb

Explanation:

Let the two lightbulb be A and B respectively.

Given the following data;

Power A = 120W

Power B = 90W

Voltage = 120V

To find the current flowing through each lightbulb;

a. For lightbulb A

Power = current * voltage

120 = current * 120

Current = 120/120

Current = 1 Ampere.

b. For lightbulb B

Current = power/voltage

Current = 90/120

Current = 0.75 Amperes

Therefore, the lightbulb that carries more current is A with 1 Ampere.

7 0
3 years ago
Q: What happens when cold air approaches a body of warm air?     Optional Answers:      A. The Warm air rises.     B. The warm a
artcher [175]
A. The warm air rises! Hope this helps
8 0
3 years ago
Read 2 more answers
In order to maintain his status as an admired pianist, the late Arthur Rubinstein during his old age used special strategies, su
cricket20 [7]

Answer:

The Baltes' model of successful aging and its considerations for Aging Life Care

Explanation:

Baltes theory of successful aging – usually referred to as the SOC (selection, optimization, compensation) model. This model seemed to say that the old school of thought – disengagement – could be replaced by actively pursuing the means to make any specific situation better.

The selection, optimization and compensation (SOC) model, first presented by Baltes and Baltes (1990), provides a general theory for conceptualizing processes of successful development generally and in aging in particular (S.-C. Li & Freund, 2005). The meta-model of SOC evaluates cognitive-motivational processes regulating human development across the life span and was originally designed and developed as an explanatory framework for adaptation to aging.

The key concept of SOC describes a general process of adaptation that individuals are likely to engage in throughout life and is essential for the achievement of higher levels of functioning (P. B. Baltes & Baltes, 1990). The model takes the global view that at all stages of human development individuals manage their lives successfully through the developmental regulation processes of selection, optimization, and compensation. Successful development involves the orchestration of these three processes (selection, optimization, and compensation) which in turn, regulate the maximization of gains and minimization of losses over time. Selection, optimization, and compensation can be conceived of as one single “integrative” process of adaptive mastery and also on a lower or more micro level of aggregation, the facets of SOC can be viewed as separate processes, each contributing to successful development (Freund & Baltes, 1998b).

Selection refers to an individual focusing attention on fewer, more important goals e.g. rescaling/reconstructing goals. Optimization involves engaging in goal-directed actions and means; examples include investing time and energy into the acquisition, refinement and application of goal-relevant means, seizing the right moment, persistence, acquisition of new skills/resources, and practice of skills.

Compensation maintains a given level of functioning in the face of loss and decline in goal-relevant means by individuals investing in compensatory means.

3 0
3 years ago
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