How does a controlled experiment work?

Answers

Answer 1

Answer: A controlled experiment works when an observer tests a hypothesis by looking for changes brought on by alterations to a variable.

Related Questions

A fault that is formed when compression causes the hanging wall to move over the foot wall is a(n) ______.
The doppler effect is the change in observed frequency due toa. the type of medium the wave is in b. the type of wave c. the original frequency of the source d. the motion of the source or observer
What is the final speed of a lion initially running at a speed of 30 m/s, if it accelerates ata rate of 3 m/s3 for 5 seconds?
Two objects collide and bounce apart. Assuming no outside forces act on the system, which best describes the total momentum after the collision?It is always greater than it was before the collision. It is often greater than it was before the collision. It is always the same as it was before the collision. It is often the same as it was before the collision.
A car travels from boston

A sound-producing object is moving toward an observer. The sound the observer hears will have a frequency ___ that actually being produced by the object. higher than
lower than
same as

Answers

The answer is higher than.
A sound-producing object is moving toward an observer. The sound the observer hears will have a frequency higher than that actually being produced by the object.

Why?
As the source of the waves is moving toward the observer, each of the successive wave crest is emitted from a position closer to the observer than the previous wave.
Thus each wave takes slightly less time to reach the observer than the previous wave. So, the time between the arrival of successive wave crests at the observer is reduced, increasing the frequency.

Answer: higher than

This phenomenon is known as the Doppler Effect. It occurs when a sound producing object is approaching towards an observer, it can be noticed that the sound is higher than what it really is. The sound usually fades as the object passes by.

A student squeezes several oranges to make a glass of orange juice. The juice contains pieces of orange pulp mixed with the juice. Explain why this drink can be considered a combination of a suspension and a solution.

Answers

Answer:

The juice contains sugars, plant pigments, and other chemicals dissolved in water. This is a solution. The pieces of orange pulp will rise to the top or settle to the bottom of the juice if it is allowed to sit. The pieces of pulp mixed with the juice form a suspension.

Explanation:

In chemistry, a suspension is a heterogeneous mixture containingsolid particles that are sufficiently large for sedimentation. Usually they must be larger than one micrometer. A Suspension is a heterogeneous mixture in which the soluteparticles do not dissolve but get suspended throughout the bulk of the medium.a solution is a homogeneous mixture composed of two or moresubstances. In such a mixture, a solute is a substance dissolved in another substance, known asa solvent.. it is considered a solution andsuspension because the orange juice mix with water while the pulp did not andretained as solid

1. Calculate the resistance of a 12v, 20-amp circuit.

Answers

Answer:

R = 0.6 ohms

Explanation:

We have,

Voltage of the circuit is 12 V

Current flowing in the circuit is 20 A

It is required to find the resistance of the circuit. Ohm'slaw gives the relationship between voltage, current and resistance. It is given by :

$V=IR$

R = resistance

$R=(V)/(I)\n\nR=(12)/(20)\n\nR=0.6\ \Omega$

so, the resistance of the circuit is 0.6 ohms.

Which statements explain current theories about dark energy and dark matter? Check all that apply.(correct) Space that appears empty actually contains dark energy and dark matter.
(correct) Dark matter does not emit electromagnetic radiation.
Scientists believe dark energy will cause the universe to collapse inward to a single point.
(correct) Scientists theorize that dark energy is causing the expansion of the universe to accelerate.
Dark matter includes all of the dust, ice, and debris that scientists observe in black holes.

just trynna help out future students

Answers

Answer:

Space that appears empty actually contains dark energy and dark matter

Dark matter does not emit electromagnetic radiation

Scientists theorize that dark energy is causing the expansion of the universe to accelerate

Explanation:

According to the current theories about dark energy and dark matter, scientists theorize that dark energy is causing the expansion of the universe to accelerate as dark matter does not emit electromagnetic radiation. Moreover, the space that appears empty actually contains dark energy and dark matter.

Answer:

A, B, D or 1, 2, 4

Explanation:

i did it on edge hope it helps

Millikan measured the electron's charge by observing tiny charged oil drops in an electric field. Each drop had a charge imbalance of only a few electrons. The strength of the electric field was adjusted so that the electric and gravitational forces on a drop would balance and the drop would be suspended in air. In this way the charge on the drop could be calculated. The charge was always found to be a small multiple of 1.60 × 10-19 C. Find the charge on an oil drop weighing 1.00 × 10-14 N and suspended in a downward field of magnitude 2.08 × 104 N/C.

Answers

Answer:

$4.8\cdot 10^(-19) C$

Explanation:

For a drop in equilibrium, the weight is equal to the electric force (in magnitude):

$W = F_e$

where here we have

$W=1.00\cdot 10^(-14)N$ is the weight of the drop

$F_e$ is the magnitude of the electric force, which can be rewritten as

$F_e = qE$

where

q is the charge of the oil drop

$E=2.08 \cdot 10^4 N/C$ is the magnitude of the electric field

Substituting into the equation and solving for q, we find the charge of the oil drop:

$q=(W)/(F_e)=(1.00\cdot 10^(-14)N)/(2.08\cdot 10^4 N/C)=4.8\cdot 10^(-19) C$

Relationship between oceanography and cryosphere

Answers

Oceanography is the study of the ocean and the cryosphere are the portions of the earth that are just frozen water (ice). When fresh water glaciers melt, they lower the salt levels in the ocean and and oceanographer studies that and makes sure that it wont have too much of an effect. The cryosphere plays a significant role in the global climate.

Other Questions

An object has one force acting on it. it is a 33-newton force pointing downward. to create a net force of zero on the object, which force must be applied to it?

The pressure of a gas will increase as the volume of the container decreases, provided temperature does not change. This statement is called _____. Boyle's law Charles's law Archimedes' principle Pressure laws

A small child has a wagon with a mass of 10 kilograms. The child pulls on the wagon with a force of 2 newtons. What is the acceleration of the wagon?

What is Newton’s second law of motion