Answer:
v = (5.2 ± 0.2) 10⁻² m / s
Explanation:
This is an exercise in kinematics of uniform motion. The formula for the average speed is
v = x / t
let's calculate
v = 5.2 / 100
v = 0.052 m / s
v = 5.2 10-2 m / s
we have to find the uncertainty of this quantity we propagate the error using derivatives
Δv = dv /dx Δx + dv /dt Δt
taking everything in the most unfavorable case, I mean all positive
let's make the derivatives
dv / dx = 1 / t
dv / dt = -x / t²
we substitute
Δv = 1 /t Δx + x /t² Δt
let's calculate the error
Δv = 1/100 0.1 + 5.2 / 100² 1
Δv = 1 10⁻³ + 5.2 10⁻⁴
Δv = 1.52 10⁻³ m/s
the error must be given with a significant figure
Dv = 2 10⁻³ m / s
the answer is
v = (5.2 ± 0.2) 10⁻² m / s
Answer:
Manometer is a measures to the atmospheric measure.
Barometer is a measure to the atmospheric pressure.
Explanation:
- Manometer is there are two types (1) closed tube (2) open tube, is filled with liquid water and mercury and the tube.
- Manometer do not need equal size of the tubes to the open ended manometers.
- Manometers is simple to attach on this filled to the high pressure gas in the bulb,this gas pressure put on the tube.
- Manometer is the attach the gas and vacuum gas to the open of the air, its high pressure gas is to the one of end.
- Manometer are filled the mercury to the heavy liquid manometer filled the liquid water and oil with the mercury.
- Barometer is to the close ended tube and the glass tube is the open and that a vacuum is the other end.
- Barometer can the u shaped and the closed ended tubes to the barometers.
- Barometer is the mercury closed end and vacuum is the tallest point in the liquid.
- Barometer is also used to be a table or left standing and also be digital and portable traditional glass, may find the digital clock .
- Barometer are filled the mercury to the high level liquid must be extreme tall in change in atmospheric pressure.
Answer:
d = vi * t + ½ * a * t^2, a = -0.5
d5 = 20.8 * 5 – ½ * 0.5 * 5^2 = 91.5 m
d6 = 20.8 * 6 – ½ * 0.5 * 6^2 = 106.8m
d6 – d5 = 15.3 m
Explanation:
Answer:
PE = M g H gravitational potential energy
KE - 1/2 M V^2 kinetic energy
PE = KE kinetic energy equal to initial gravitational energy
By definition, when the speed of the light changes when it passes from a material to another, this is called "Refraction of light". This happens when there is a difference in the index of refraction between both mediums o materials. Therefore, that speed depends of <span>the medium through it passes.
</span>
T<span>he index of refraction</span> is expressed as below:
n=c/v
"n" is <span>the index of refraction.
</span> "c" is <span>is the speed of light.
</span> "<span>v" is the phase velocity of light in the medium.
</span>
A prism, a magnifying glass, a microscope, and eyeglasses refract light. Therefore, the correct option is: B) They refract light.