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4 years ago

1.

Physics

1 answer:

Mumz [18]4 years ago

8 0

Answer

Procedural bias occurs when the unfair amount of pressure is applied to complete their response quickly.

Measurement bias occurs when there is systematic or random error occur while taking the reading.

Design bias occur when the research fails to encounter all the aspects of the projects before presenting conclusion.

1) The correct answer is option B.

Balance is miscalibrated hence there will be systematic error which is a type of measurement bias.

2) The correct answer is option A.

Limiting response time for participant is an example of Procedural bias.

3) The correct answer is option A

Here, Jackie has not surveyed the diverse group so it is the case of design bias

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Consider an insulated tank with a volume V = 2 L is separated into two equal-volume parts by a thin wall. On the left is an idea

steposvetlana [31]

Answer

given,

V = 2 L

the left is an ideal gas at P = 100 k Pa and T = 500 K

mass is constant

$m_1 = m_2$

$\dfrac{P_1V_1}{RT_1} = \dfrac{P_2V_2}{RT_2}$

Pressure is same because it's not changing due to process

$\dfrac{V}{500} = \dfrac{2 V}{T_2}$

$T_2 = 1000\ K$

$\Delta S_{univ} = \Delta S_{sys} + (\Delta S)_{surr}$

$\Delta S_{univ} =m(C_v ln (\dfrac{T_2}{T_1}))+ R ln (\dfrac{V_2}{V_1})$

$m = \dfrac{P_1V_1}{RT_1}$

$m = \dfrac{100 \times 10^3 \times 2 \times 10^{-3}}{287\times 500}$

m = 1.39 x 10⁻³ Kg

$\Delta S_{univ} =1.39\times 10^{-3}(0.718 ln\ 2+ 0.287 ln (2)$

$\Delta S_{univ} =0.968\times 10^{-3}\ kJ/K$

5 0

3 years ago

Functions of resistor

Finger [1]

Answer:

First fall Resistor mean passive two terminal electrical components that implements electrical resistance as a circuit an then is function are used to reduce current flow , adjust single level to divide voltage ,terminate transmission.

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4 years ago

The left ventricle of the heart accelerates blood from rest to a velocity of 26 cm/s. (a) If the displacement of the blood durin

pentagon [3]

Explanation:

Initial speed of blood, u = 0

Final speed of the blood, v = 26 cm/s

(a) Displacement of the blood, d = 2 cm

Let a be its acceleration. It can be calculated using third equation of motion as :

$a=\dfrac{v^2-u^2}{2s}$

$a=\dfrac{(26)^2}{2\times 2}$

$a=169\ cm/s^2$

(b) Let t is the time taken by the blood to reach its final speed. It can be calculated as :

<u> $t=\dfrac{v-u}{a}$ </u>

$t=\dfrac{26\ cm/s}{169\ cm/s^2}$

t = 0.15 s

Hence, this is the required solution.

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3 years ago

Your cousin Freddy is about to start a new job as the manager of a convenience store. He knows you are taking a business course,

Marrrta [24]

The most important managerial skill Freddy needs to have is business acumen because it will improve his business instincts and allow him to guide him team to where they can have the most impact.

<h3>What is managerial skill?</h3>

Managerial skills are the knowledge and ability of the individuals in a managerial position to fulfil some specific management activities or tasks.

<h3>Managerial skills for convenience store</h3>

The most sought-after qualifications in a Convenience Store Manager are;

business acumen,
leadership,
organization,
good communication
networking skills, and
sales orientation

Thus, the most important managerial skill Freddy needs to have is business acumen because it will improve his business instincts and allow him to guide him team to where they can have the most impact.

Learn more about managerial skills here: brainly.com/question/28072629

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1 year ago

A moving bomb explodes into two pieces. A 2 kg fragment moves to the right at 15 m/s and the other fragment of mass 10 kg moves

Alla [95]

The initial velocity is obtained as 2.5 m/s.

<h3>What is the initial speed?</h3>

To obtain the initial speed, we have to apply the law of conservation of linear momentum which states that momentum before collision is equal to momentum after collision.

Now, the two fragments initially had one velocity before they were split in two directions opposite each other;

Applying the principle of conservation of linear momentum to this problem;

(2 + 10)v = (6 * 10) - (2 * 15) (they moved in opposite directions)

12v =60 - 30

12v = 30

v = 30/12

v = 2.5 m/s

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2 years ago