Which of the following is the SI unit used to measure length?a. kilogram
b. liter
c. meter
d. Kelvin
Answers
Answer : The SI unit to measure length is "meter".
Explanation :
SI unit means the international system of units. There are some fundamental units and some of the units are derived from fundamental units.
The SI units of some quantities are as follows :
- Mass : The SI unit of mass is Kilogram or Kg.
- Volume : The SI unit of volume of liter.
- Length : The SI unit of length is meter.
- Temperature : The SI unit of temperature is kelvin.
Hence, the correct option is (b) " meter ".
Answer:
Option c: Meter.
Explanation:
The meter is the unit of length in the international system of units. That system establishes standard measure at an international level for the following units:
- Meter (m)
- Seconds (s)
- Kilograms (Kg)
- Ampere (A)
- Kelvin (K)
- Mol (mol)
The meter is defined as the distance that light travels in vacuum in ratio of of a second.
Related Questions
What is a longitudinal wave?a. particles that travel in parallel to the direction of energy movement b. particles that travel in a reverse direction to the direction of energy movement c. particles that travel perpendicular to the direction of energy movement d. particles that travel in an intersecting direction to the direction of energy movement
In chemistry a 'system' is ___________________.A. The part of the universe that is being studied at the moment.B. The entire universe.C. All of theseD. Outside of the experiment, or reaction of interest.
Question 2 of 10Which illustration represents low accuracy and low precision?
Nicolaus Copernicus was considered: a heretic because his theory disagreed with the church a hero because his theory agreed with current beliefs the "Father of Astronomy" because he believed the earth was the center of the solar system
Answers
Explanation:
Max will be when they are in the same direction: 8 + 5 = 13 units
Min will be when they are in opposite directions 8-5 = 3 units
Answers
Answers
temperature is the answer
Answers
The rocket launches when the countdown reaches "T minus 0." "T" represents the time remaining until a specific event.
What does "T" symbolize in rocket launch countdowns?
In the context of rocket launches, "T" represents time. The countdown begins with "T minus" indicating the time remaining until liftoff. As the countdown progresses, the value of "T" decreases, counting down to zero, which marks the exact moment of launch.
Once the rocket is airborne, the countdown transitions to "T plus," denoting the time elapsed since liftoff. This standardized countdown terminology allows mission control to communicate crucial timing information precisely and efficiently during various phases of the rocket's journey.
Read more about rocket launch
#SPJ3
Answer: The "T" in rocket launch
Explanation:
This tells the Mission Control What will be happening
b.) how long will it take for the swimmer to cross the river, if the distance from the starting point to the dock is 300 m?
Please show all your work, thanks
Answers
a)The direction that she must aim herself through the water to arrive at the dock will be 73.7°.
b)The time it takes for the swimmer to cross the river will be 240 seconds.
What is speed?
Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its si unit is m/sec.
Given data;
The maximum speed of the swimmer In still water,v=1.25m/s.
Speed of river = 0.35m/s [E]
α is the direction that she must aim herself through the water to arrive at the dock.
t is the time it takes for the swimmer to cross the river
The distance from the starting point to the dock is,s = 300 m
If the swimmer were to swim straight, the water's speed along the x-axis would have to match that of the swimmer.
α is the angle between vx and v
The value of the
The time that the swimmer will use for reaching the dock;
s = V×t
t = s/(v)
t=300 m / 1.25 m/sec
t = 240 seconds
Hence, the direction that she must aim herself through the water to arrive at the dock. and it takes for the swimmer to cross the river will be 73.7° and 240 seconds respectively.
To learn more about the speed refer to the link;
#SPJ2
Explanation:
As you can see in the picture, we want the swimmer to go on a straight line, so the speed of the water must be equal to the speed of the swimmer along the x-axis. We also know the value of v, so we can calculate the of the cosine of the angle (alpha) between Vx and V. Thanks to the fundamental relation of gioniometry (cos^2(x) + sin^2(x) = 1) we can find the sine of alpha and calculate Vy. With Vy we can calculate the time that the swimmer will use for reaching the dock: s = Vy * t => t = s/(Vy).
I'll let you do all the calculations, you just have to plug in values.
lens.?
Answers
1/f = 1/v - 1/u
where f is the focal length of the lens, v is the image distance, and u is the object distance.
Given that the focal length (f) is 4.0 m and the object distance (u) is 12.0 m, we can substitute these values into the formula:
1/4 = 1/v - 1/12
To solve for v, we need to rearrange the equation:
1/v = 1/4 + 1/12
1/v = (3 + 1)/12
1/v = 4/12
1/v = 1/3
Now, we can find the value of v by taking the reciprocal of both sides:
v = 3 meters
So, the image distance (v) is 3 meters.
To find the image size, we can use the magnification formula:
magnification (m) = -v/u
Given that the object height (h) is 2.0 meters, we can substitute these values into the formula:
m = -v/u = -3/12 = -1/4
The negative sign indicates that the image is inverted. The magnification value of -1/4 means that the image is one-fourth the size of the object.
Therefore, the image size is 1/4 of the object's height, which is 1/4 * 2.0 = 0.5 meters.
So, the image size is 0.5 meters and the image distance is 3 meters from the convex lens.
I hope this explanation helps! Let me know if you have any further questions.