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Physics

Cole Paul

In double-blind studies neither the test subject or the researcher knows who was given the drug and who was given the control. Why are these studies effective for testing a drug that may elevate mood and relieve feelings of depression?

a) Since there are two symptoms that are affected, a double-blind study is required.

b) Double-blind studies are ways to ensure that only the researcher can figure out who is getting the effective drug.

c) Double-blind studies are the most economical way to gather results from testing on humans.

d) The patients and researchers are not given this information so they cannot be influenced in reporting the effectiveness.

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Physics

Jessie Reyes

A circuit is supplied with 24 volts and its load offers a total resistance of 400 ohms. What's the total circuit power?

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Physics

Dalton

Assume that a satellite orbits mars 150km above its surface. Given that the mass of mars is 6.485 X 10^23kg, and the radius of mars is 3.396 X 10^6. What is the satellites period?

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Physics

Alyson

Calculate the kinetic energy of a 4 kg object traveling at 16 m/s

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Physics

Romeo

10

What produces electromagnetic radiation?

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Physics

Eliza Huang

At this output power, how long would it take an 89 kg cyclist (including the mass of his bike) to climb the famed 1100-m-high alpe d'huez mountain stage? neglect any friction.

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Physics

Rowan Ramsey

What part of an atom is responsible for producing magnetic fields

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Physics

Paityn Solomon

A bar meter is used to measure

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Physics

Perla Cortez

Three parachutists have the following masses: A: 50 kg, B: 40 kg, C: 75 kg Which one has the greatest terminal velocity?

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Physics

Manuel Murphy

A plane is flying horizontally at a height of 500 m and a constant speed of 429 km/h when an object is projected downward at an initial speed of 35.0 m/s. if air resistance is neglected, the average vertical component of velocity between the object's release and its striking the ground is

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Physics

Savion Wall

Which statements are true?

A. Science is a collection of facts that does not evolve. We have gained all the knowledge we can from science.

B. Scientists observe natural events occurring around them. They question these observations and investigate them.

C. All scientists follow one scientific method of investigation.

D. If a hypothesis is not verified by the results from the scientific method, scientists may either redo the process or create a new hypothesis.

E. Once they reach a conclusion, scientists often keep the results to themselves.

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Physics

Miracle Owen

How many types of quarks are there and what is the name of one of them

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Physics

Cheerio

A windmill produces 1400 watts of electric power that is used to heat water. The efficiency is 100%. How long will it take to raise the temperature of 40 gallons of water by 50∘F?

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Physics

Baylee Richmond

What is a chemical energy

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Physics

Mackenzie Mcclure

Multiple sound waves reflections in a room are called?

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