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nika2105
1 month ago
9

Four students measured the acceleration of gravity. The accepted value for their location is 9.78 m/s2. Which student's measurem

ent has the largest percent error?
Physics
2 answers:
ValentinkaMS [3.4K]1 month ago
6 0
The correct measurement should actually be from student 1: 9.87 m/s², rather than 9.78.
Yuliya22 [3.3K]1 month ago
4 0
The correct answer is 9.45 m/s². I just completed the quiz, and among the options "9.85, 9.45, 10.01, 9.75," the right choice is 9.45 m/s².
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A gas is compressed in a cylinder from a volume of 20.0 l to 2.0 l by a constant pressure of 10.0 atm. calculate the amount of w
Maru [3345]
First, we must transform the pressure into SI units, considering that 1 atm = 1.01 \cdot 10^5 Pa:
p=10.0 atm =1.01 \cdot 10^6 Pa

The starting and ending volumes of the gas will be as follows (keeping in mind that 1.0 L = 0.001 m^3):
V_i = 20.0 L=0.020 m^3
V_f = 2.0 L=0.002 m^3

Thus, the work performed on the gas by its surroundings is
W= -p \Delta V=-p(V_f-V_i)=-(1.01 \cdot 10^6 Pa)(0.002 m^3-0.020 m^3)=18180 J
The positive outcome indicates that this work leads to a rise in the gas's internal energy.
8 0
2 months ago
Smoking increases ____ levels in the blood, thus increasing the possibility of unwanted clotting.
ValentinkaMS [3465]
It may lead to higher levels of homocysteine, which can harm the inner linings of arteries. Such damage often results from unwanted clotting that can occur due to factors like smoking, which tends to raise unwanted blood clots in the body, ultimately causing these levels to rise and resulting in undesired consequences.
7 0
2 months ago
Three point charges are positioned on the x axis. If the charges and corresponding positions are +32 µC at x = 0, +20 µC at x =
Sav [3153]

Response:

Magnitude of the electrostatic force acting on the +32 µC charge, F_{net} = 12 N

Clarification:

Let q₁ = +32 µC, located at x₁ = 0

q₂ = +20 µC, positioned at x₂ = 40 cm = 0.4 m

q₃ = -60 µC, placed at x₃ = 60 cm = 0.6 m

Define the force magnitude on the +32 µC charge from the +20 µC charge as F₁ (the force on q₁ due to q₂).

F_{2} = \frac{kq_{1}q_{2} }{x_{2}^2 }

F_{2} = \frac{9 * 10^{9} * 32 * 10^{-6} * 20 * 10^{-6} }{0.4^2 }\\F_{2} = 36 N

Define the force magnitude on the +32 µC charge from the -60 µC charge as F₂ (the force on q₁ due to q₃).

F_{3} = \frac{kq_{1}q_{3} }{x_{3}^2 }

F_{3} = -\frac{9 * 10^{9} * 32 * 10^{-6} * 60 * 10^{-6} }{0.6^2 }\\F_{3} =-48 N

The resultant electrostatic force on the 32 µC charge is F_{net} = |F_{2} + F_{3}|

F_{net} =| 36 + (-48)| \\F_{net} =|- 12 N| \\ F_{net} = 12 N

7 0
2 months ago
A 1.0-kilogram ball is dropped from the roof of a building 40. meters tall. What is the approximate time of fall? [Neglect air r
Maru [3345]
H = 40 m is the height from which the ball is released.
m = 1 kg is the ball's mass

Assuming g = 9.8 m/s² and disregarding air resistance.

The vertical velocity at the start is zero.
Let t be the flight duration, then
40 m = (1/2)*g*(t s)² = 0.5*9.8*t²
t² = 40/4.9 = 8.1633
t = 2.857 s

Result: 2.9 s (rounded to the nearest tenth)
3 0
1 month ago
Read 2 more answers
The ballistic pendulum was invented in 1742 by English mathematician Benjamin Robins. It consists of an initially stationary pen
serg [3582]

Answer:

What is your question?

Please feel free to modify or inquire in the comments.

Thank you.

Explanation:

7 0
2 months ago
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