Which of the following is an example of measurement bias?a. a scale that reads zero when nothing is on it
b. a stopwatch that stops immediately when the stop button is clicked
c. a balance that always reads .01 g
d. measuring your height in your bare feet

Answers

Answer 1

Answer: A scale that reads zero when nothing is on it meansthat the scale reads that there is nothing on it. Statement a is not biased. A stopwatchthat stops immediately when the stop button is clicked means that there is nodelayed reaction of the stopwatch. It corresponds exactly as it is pressed. Statementb is not biased. A balance that always reads 0.01g means that the balance isnot set to zero or it is damaged. If no matter how heavy ythe object is, thebalance reads 0.01g, the measurement is not accurate anymore. Statement c isbiased.

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super mario, spying a mystery block just ahead and wanting star power, takes a running leap towards the block, which is a distance of 8.2 m above mario's head. the acceleration due to gravity in the mushroom kingdom is roughly 1/5th of that on earth, gmk

Answers

The time taken by Super Mario is 2.91 seconds to reach the mystery block.

To find the time it takes for Super Mario to reach the mystery block, we can use the kinematic equation:

∆y = v0t + (1/2)at2

Where ∆y is the change in a vertical position, v0 is the initial vertical velocity, a is the acceleration due to gravity, and t is the time.

Since the mystery block is 8.2 m above Mario's head, ∆y = 8.2 m. The initial vertical velocity, v0, is 0 m/s since Mario is starting from rest. The acceleration due to gravity in the Mushroom Kingdom, gmk, is 1/5th of that on Earth, so

a = (1/5)g = (1/5)(9.8 m/s2)

a = 1.96 m/s2.

Plugging these values into the equation, we get:

8.2 m = (0 m/s)t + (1/2)(1.96 m/s2)t2

Simplifying and rearranging, we get:

t2 = (8.2 m)/(0.98 m/s2)

Taking the square root of both sides, we get:

t = √((8.2 m)/(0.98 m/s2)) = 2.91 s

To learn more about Time :

brainly.com/question/2364404

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The temperature of a system must increase when heat energy is added true or false?

Answers

False.

In fact, the temperature T of a system is directly proportional to the internal energy U of the system, and the first law of thermodynamics states that the variation of internal energy of a system is given by
$\Delta U = Q-W$
where
Q is the heat added to the system
W is the work done by the system on the surroundings

We see from the formula that we have 2 possible cases:
1) the heat added to the system (Q) is greater than the work done by the system (W) --> $\Delta U$ is positive, this means that the temperature of the system increases
2) the heat added to the system (Q) is less than the work done by the system (W) --> $\Delta U$ is negative, this means that the temperature of the system decreases

Therefore, it's not true that when heat is added to the system, its temperature must increase: it depends on the value of the work done, W. So, the original statement is false.

Can a human being die by licking a diamond?

Answers

Answer:

the answer of this question ❓ is no

The atomic mass of an element whose atoms consist of seven protons, eight neutrons, and seven electrons is _____?a. 7
b. 14
c. 15
d. 22

Answers

The atomic mass is C. 15

Atomic mass = P + N = 7+8 = 15

The atomic mass of an element is defined as the sum of the protons and neutrons. On the other hand, the atomic number of a neutral element is equivalent to the number of protons or electrons. This is because a neutral element should have equal number of protons and electrons.

Answer:

Explanation:

Suppose that now you want to make a scale model of the solar system using the same ball bearing to represent the sun. How far from it would you place a sphere representing the earth? (Center to center distance please.) The distance from the center of the sun to the center of the earth is 1.496×10111.496×1011 m and the radius of the sun is 6.96×1086.96×108 m.

Answers

In this exercise we have to use the knowledge in distance, in this way we will find that the proportional distance found is:

$d = 0.645 m$

So from the information given in the text we find that:

The distance from the center of the sun to the center of the earth is $1.496*10^(11) \ m$

The radius of the sun is $6.96*10^(8)m$

We need to assume a radius for the ball bearing, so suppose that the radius is $3 mm$

First, we need to find in what way or manner often the radius of the brightest star exist considerable respect to the range of the ball significance, that exist given apiece following equating:

$(r_a)/(r_b)= \frac{6.96*10^8}{3*10{-3}} =2.32*10^(11)$

Now, we can calculate the distance from the center of the sun to the center of the sphere representing the earth:

$d_(s) = (d_(e))/(r_(s)/r_(b)) = (1.496 \cdot 10^(11) m)/(2.32\cdot 10^(11)) = 0.645 m$

See more about distance at brainly.com/question/989117

Answer:

d = 0.645 m(assuming a radius of the ball bearing of 3 mm)

Explanation:

The given information is:

The distance from the center of the sun to the center of the earth is 1.496x10¹¹m = $d_(e)$
The radius of the sun is 6.96x10⁸m = $r_(s)$

We need to assume a radius for the ball bearing, so suppose that the radius is 3 mm = $r_(b)$ .

First, we need to find how many times the radius of the sun is bigger respect to the radius of the ball bearing, which is given by the following equation:

$(r_(s))/(r_(b)) = (6.96\cdot 10^(8)m)/(3\cdot 10^(-3)m) = 2.32\cdot 10^(11)$

Now, we can calculate the distance from the center of the sun to the center of the sphere representing the earth, $d_(s)$ :

[tex] d_{s} = \frac{d_{e}}{r_{s}/r_{b}} = \frac{1.496 \cdot 10^{11} m}{2.32\cdot 10^{11}} = 0.645 m

I hope it helps you!

Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. He turned the car one more time and went 35 meters east. His car was 15 meters from the starting line. This took 5 seconds.What is the car’s velocity?
A. 3 m/s west

B.3 m/s east

C. 19 m/s west

D. 19 m/s east

Answers

Although the car's average speed is 19 m/s ,
its velocity is 3 m/s east.

Velocity is (displacement) / (time)

and Displacement is the distance between the start point and
end point, no matter what route was traveled between them.

In this case, the displacement is 15 meters east.
So the velocity is

(15 meters east) / (5 sec) = 3 meters/sec east .

Answer:

i dont know what he said but i think C

Explanation:

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