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steposvetlana [31]
3 years ago
14

The variable that you change during an experiment is called what type of variable?

Physics
2 answers:
elena-s [515]3 years ago
7 0
The independent variable 
Norma-Jean [14]3 years ago
5 0
Independent is the affect of a dependent variable
control keeps everything the same
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A moving sidewalk 95 m in length carries passengers at a speed of 0.53 m/s. One passenger has a normal walking speed of 1.24 m/s
Archy [21]

Answer:

a) t = 1.8 x 10² s

b) t = 54 s

c) t = 49 s

Explanation:

a) The equation for the position of an object moving in a straight line at constan speed is:

x = x0 + v * t

where

x = position at time t

x0 = initial position

v = velocity

t = time

In this case, the origin of our reference system is at the begining of the sidewalk.

a) To calculate the time the passenger travels on the sidewalk without wlaking, we can use the equation for the position, using as speed the speed of the sidewalk:

x = x0 + v * t

95 m = 0m + 0. 53 m/s * t

t = 95 m/ 0.53 m/s

t = 1.8 x 10² s

b) Now, the speed of the passenger will be her walking speed plus the speed of th sidewalk (0.53 m/s + 1.24 m/s = 1.77 m/s)

t = 95 m/ 1.77 m/s = 54 s

c) In this case, the passenger is located 95 m from the begining of the sidewalk, then, x0 = 95 m and the final position will be x = 0. She walks in an opposite direction to the movement of the sidewalk, towards the origin of the system of reference ( the begining of the sidewalk). Then, her speed will be negative ( v = 0.53 m/s - 2*(1.24 m/s) = -1.95 m/s. Then:

0 m = 95 m -1.95 m/s * t

t = -95 m / -1.95 m/s = 49 s

3 0
3 years ago
Which is the most accurate description of the plasma state of matter? A. It has a fixed volume. B. Its shape is not fixed. C. It
anastassius [24]

Answer:

Its shape is not fixed

Explanation:

Plasma is sometimes a subset of gases, whereas it is also a state of matter.

These two states are different.

  No fixed shape for plasmas, no fixed volume.

Compared to solids and liquids plasmas are less dense.

 Atoms are used in the making of Plasma.

In plasma state ions are the positively charged nuclei

 

When they gain or lose electrons these atoms and molecules acquire a positive or negative electrical charge,  process is called ionization.

8 0
3 years ago
How are surface temperature and length of year on a planet related to the planet’s distance from the Sun?
Artist 52 [7]
The farther from the sun an object is the larger the distance a planet has to orbit the sun. So if a planet is far from the sun the years would be longer. And if a planet is close to the sun it would be much hotter than a planet that is far from the sun.
8 0
3 years ago
Which statement correctly describes sound waves
Alexxandr [17]

Answer:

Sound waves are longitudinal waves

Explanation:

Sound waves are the longitudinal waves. In longitudinal waves, the particles of the wave move parallel to the direction of propagation of waves.

It moves in the form of compression and rarefaction. When the particles are compact in a space the compression occurs while when they far apart form each other rarefaction occurs.

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Explain why it is easier to climb a mountain on a zigzag path rather than one straight up the side.
GaryK [48]
Although a zig zag pattern going up a mountain means you walk further, the incline of the slope is a lot less so you don't have to work as hard.
8 0
3 years ago
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