1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anon25 [30]
4 years ago
8

How many variables should there be in a well-designed experiment?

Physics
1 answer:
s344n2d4d5 [400]4 years ago
8 0

Answer:

1

Explanation:

You might be interested in
A badger is trying to cross the street. Its velocity vvv as a function of time ttt is given in the graph below where rightwards
hjlf

The badgers displacement from its position at point <em>t </em>= 2, to its position at point <em>t </em>= 3 is 25 meters

<h3>Which method can be used to calculate the displacement of the badger?</h3>

The points on the graph are;

(0, 0), (1, 5), (3, -5), (6, -5)

The point <em>t </em>= 2 is between (1, 5) and (3, -5)

The slope, <em>m</em>, of the line containing the point <em>t </em>= 2 is therefore;

  • m = (-5 - 5)/(3 - 1) = -5

The equation of the line is therefore;

v - 5 = -5•(t - 1)

v = -5•t + 5 + 5 = -5•t + 10

v = -5•t + 10

At <em>t </em>= 2, we have;

v = -5×2 + 10 = 0

The velocity at <em>t </em>= 2 is 0 m/s

The value of the acceleration is the same as the slope, <em>m </em>= a = -5

Given that the initial velocity at <em>t </em>= 2 is 0, we have;

∆x = u•t + 0.5•a•t²

At <em>t </em>= 3, the time of travel from the time <em>t </em>= 2 is 1 seconds, which gives;

∆x = 0×5 + 0.5×(-5)×1² = -2.5

The distance traveled between points,<em> </em><em>t </em>= 2 and <em>t </em>= 3 is ∆x = -2.5, which is 2.5 meters in the direction opposite to the initial direction.

Learn more about the equations of motion here:

brainly.com/question/21010554

#SPJ1

5 0
2 years ago
Compare the Summer Solstice with the Autumn Equinox. Justify your response in two or more complete sentences.
ryzh [129]
Midway between the two<span> solstices we have equinoxes – Vernal Equinox in March and </span>Autumnal Equinox<span> in September. ... After this time, the Earth's northern axis is tilted </span>more<span> and </span>more<span>towards ... Then on </span>Summer Solstice<span>, the Sun will reach its farthest north position in the sky</span>
4 0
3 years ago
Read 2 more answers
Qualitative and Quantitative Momentum Problems.
Elena L [17]

Answer: the reaction force is large.

Explanation:

From Newton's third law, we know that for every action, there is equal and opposite reaction.

Since, a large amount of high speed of water is ejecting out from hose. The high momentum due to large speed in short duration of time would cause water to eject out with great force. The reaction force would act on the firefighter holding the hose. An equal amount of large force would act on him. Thus, it is difficult for a firefighter to hold a hose that ejects large amounts of high speed water.

3 0
4 years ago
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.16
Lubov Fominskaja [6]

Answer:

The minimum velocity of the ball so the string will not go slack as the ball moves around the circle = 6.17 m/s

Explanation:

During the motion of the ball round the circle, the force keeping the ball in circular motion is directed towards the centre of the circle and the gravity is always pointing down.

At the highest position in the motion of the ball, the velocity is at a minimum because the net force responsible for motion is the difference between centripetal force (force in the string, keeping the ball in circular motion) and the weight of the ball.

At the bottom position of the ball, it has maximum velocity during the circular motion (net force = centripetal force + weight).

If the velocity of the ball is too low at the bottom, the ball will not have enough energy to make it to the top.

As the ball comes to the bottom of its circular motion, its kinetic energy increases because its potential energy is decreasing and as the ball moves back to the top of the circle of the circular motion, its kinetic energy decreases because its potential energy is increasing.

So, with respect to the height of the bottom of the circular motion as point 0, the diameter of the circular motion is the maximum vertical height reached by the ball.

And the minimum kinetic energy to still be able to rise to that vertical height = potential energy at that vertical height

(1/2) mv² = mgh

m = 0.167 kg

v = ?

g = 9.8 m/s²

h = 2 × radius = 2 × 0.97 = 1.94 m

(1/2) v² = 9.8 × 1.94

v² = 2×9.8×1.94 = 38.024

v = 6.17 m/s

5 0
4 years ago
You are tasked with completing the Venn diagram comparing weather
chubhunter [2.5K]
Weather can be forecasted (meterologists) , climate can be forecasted scientists use computer programs called climate models. sorry im not sure about the other ones though :) Good luck on your assignments!
8 0
3 years ago
Other questions:
  • Plz answer the following question below plz
    12·2 answers
  • Does the coefficient of kinetic friction depend on speed?
    11·1 answer
  • A plane monochromatic light wave is incident on a double slit as illustrated in Figure 37.1.
    7·1 answer
  • How can shoe and tire marks be preserved in mud?
    5·1 answer
  • Identify the correct sequence for the formation and use of coal.
    11·2 answers
  • An object experiences an acceleration of 8.5 m/s^2 over a distance of 300 m. After that acceleration it has a velocity of 400 m/
    13·2 answers
  • Help I’ll give ndburbrbruejdmd
    11·1 answer
  • A transformer has an output coil with 6 times as many turns as the input coil. If the input frequency is f then the output frequ
    13·1 answer
  • Physics help please!
    7·1 answer
  • A girl running around a circular track of radius 200 m completes one
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!