A scientist wants to prove that certain chemicals in cosmetics are likely to cause harm to developing fetuses, when used by a pregnant woman. What is the most likely limitation she will face in her scientific design? PLEASE HURRY!!

A Scientist Wants To Prove That Certain Chemicals In Cosmetics Are Likely To Cause Harm To Developing

Answers

Answer 1

Answer:

D. Limitations due to ethical concerns about experimental subjects.

Explanation:

Answer 2

Answer:

A

Explanation:

(its my friend)


Related Questions

A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave

Answers

The speed of a wave can be calculated using this formula:

v = f x λ

Where:

v is the wave speed in metres per second, m/s

f is the frequency in hertz, Hz

λ (lambda) is the wavelength in metres, m

Calculation:

Given:

f = 20 Hz

λ = 100m

Using the equation:

v = f x λ

v = 20 x 100

v = 2000 m/s

Therfore, the speed of the wave is 2000 m/s

A sound wave has a wavelength of 100 m and a frequency of 20 Hz. The wave's speed is 2× 10^3 m/s.

assuming frequency = 20 Hz and wavelength = 100 m

utilized concept: v= = 20×100 = 2×10³ m/s

Why is frequency important?

The frequency in physics is the quantity of waves passing a fixed location in a unit of time. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given unit of time.

How would you define sound?

A sort of energy created by vibrations is sound. The molecules of the air surrounding an item vibrate as a result.. These molecules vibrate because they collide with nearby molecules, which also vibrate as a result.

To know more about Frequency, visit-

https://brainly.com/question/14316711

#SPJ2

What large city in Texas will have its third day of rain?

Answers

Answer:

houston, texas

Explanation:

i hope this helps :)

Plz help! :) :D I will mark you as BRAINLIEST!!!
Physical and Chemical Properties of Magnesium

Here is an EXAMPLE of how it has to be like. Instead of Mercury, you HAVE to do Magnesium

Physical Properties of Mercury: ”I’m a highly stable element, so you can count on me”

Chemical Properties of Mercury: ”I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”

Answers

Answer:

Some of the physical and chemical properties of magnesium are:

-The term ‘magnesium’ is derived from the Greek word magnesia, which refers to the name of the place from where it was extracted.

-Magnesium is closely related to manganese and magnetite.

-About 2.1% of the Earth’s crust contains magnesium. This makes magnesium the 6th most found element.

-The biggest deposits of magnesium is found in the seawater. It has been calculated by scientists that a cubic mile of seawater contains about 6 million tons of this element

2nd answer:

Physical Properties of Magnesium: ”I’m a highly stable element, so you can count on me”

Chemical Properties of Magnesium: ”I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon

Explanation:

Hope this helps you out! UwU

What is the product of Na +CaSO4,

Answers

Answer:

Na + CaSO4 = Na2SO4 + Ca

Explanation:

single displacement (substitution)

Which option is an example of a chemical property?
A. boiling point
B. ability to react with oxygen
C. color
D. density

Answers

Answer:

boiling point

Explanation:

Option B

what is the concept of the doppler effect?

Answers

Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer. ... For instance, when a sound object moves towards you, the frequency of the sound waves increases, leading to a higher pitch.

how this is helpful!!!!

Which of the following properly explains what takes place when light hits polarized film?

A) The intensity of the light is simply dimmed

B)The planes of light become scattered

C)The scattered light has either the horizontal plane or the vertical plane blocked

D)The intensity of the light is brighten

Answers

Answer:

C)The scattered light has either the horizontal plane or the vertical plane blocked

Explanation:

When light becomes plane polarized, it means that light is made to vibrate in only one plane.

Light usually vibrate in vertical and horizontal directions but when light becomes polarized, either the vertical or horizontal direction is blocked and it is made to vibrate in only one direction

please need asap
An atom with 38 protons and 49 neutrons would be



Strontium-49


Francium-49


Strontium-87


Francium-87

Answers

Answer:

i think it is francium 87 if i fail then i am sorry

Choose the coefficient for blank 1 (in front of Rb)

___ Rb + ___ P --> ___ Rb3P

options:

3


1


4


2

Answers

Answer:

3

Explanation:

Step 1: RxN

Rb + P → Rb₃P

Step 2: Balance RxN

We will need 3 Rb's on both sides.

3Rb + P → Rb₃P

why do competitors avoid using their compass overhead power lines

Answers

Answer:

Power lines produce a magnetic field

Explanation:

Power lines produce a type of magnet called an Electro-magnet which pulls metal magnetic objects towards it and the compass relies on magnetic feilds in order to point north.

how are subtances dissolved ?​

Answers

Answer: A solute dissolves because its particles interact with the particles of a solvent. Anything that allows more solvent to touch more solute will cause a solute to dissolve more quickly. Small pieces of a substance dissolve faster than large pieces.

A solute dissolves because its particles interact with the particles of a solvent. Anything that allows more solvent to touch more solute will cause a solute to dissolve more quickly. Small pieces of a substance dissolve faster than large pieces.

1. True or False? The scientific method is defined as a method of research
in which a problem is identified, data is gathered, and a hypothesis is
created based off the data, then the hypothesis is tested.

Answers

Answer:

true

Explanation:

please mark BRAINLIEST

A metal sample weighs 56.8 grams. How many ounces does this sample
weigh? (1 lb = 16 oz)

Answers

Answer:

2 oz. just multiply 56.8 with 0.03527

Explanation:

a piece of metal has a mass of 1.3 g/cm and a has a volume of 24.9 cm3 what is its mass

Answers

Answer:

34.611g

Explanation:

mass of metal = ?

density of metal = 1.39/cm³

volume = 24.9 cm³

density = mass/volume

mass = density × volume

= 1.39g/cm³ × 24.9 cm³

= 34.611g

Protons have about the same mass as:

A. plasma particles
B. neutrons
C. electrons

Answers

the answer is B. neutrons

IUPAC name for C3H7​

Answers

Answer:

propyl

Explanation:

......:)

..;) .........

Using the formula M=dx v, Calculate the mass of a liquid with a density of
17.5 g/mL and a volume of 7mL.

Answers

Answer:

The answer is 122.5 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 7 mL

density = 17.5 g/mL

We have

mass = 17.5 × 7

We have the final answer as

122.5 g

Hope this helps you

CAN SOMEONE HELP ME!!!!!!!!!!!!!

Answers

Answer:

5 g/cm^3

Explanation:

Density = mass / volume


Calculate the energy of a photon with a frequency of 2.36 x 10-19 Hz.

Answers

Answer:

Explanation:

energy for photon is calculated in same wasy as for electromagnetic radiation

energy for electromagnetic radiation = hf

where f is the frequency of photon

h is Planck's constant = h = 4.14 × 10−15 eV · s.

thus

energy of photon = 4.14 × 10−15 eV · s *  2.36 x 10-19 Hz

energy of photon = 9.77 * 10−(-15+ -19) eV

energy of photon = 9.77 * 10−34eV        answer

how many valence electrons does tungsten have

Answers

Answer:74

Explanation:

Answer:

I believe Tungsten has 2 valence electrons.

Explanation:

Hope this helps!

With radiocarbon dating, scientists compare an object's carbon-14 levels with _____. the carbon-14 levels of an object from the same time period carbon-14 levels in the atmosphere the carbon-14 levels in the rock surrounding the object the object's carbon-12 levels

Answers

Answer:carbon-14 levels in the atmosphere

Explanation:

When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.

Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.

What is 8S8

In need for a quick answer

Answers

Answer:

8x8 Inc. is a provider of Voice over IP products. 8x8 products include cloud-based voice, contact center, video, mobile and unified communications for businesses.

Explanation:

I NEED THESE ANSWERED!!! PLEASEEE!!!!!

Answers

i will help you one second

A ball initially at rest is dropped from a window sill 14.2 m off the ground. Find the velocity of the ball the moment it hits the ground. Round your answer to 2 decimals places.

Answers

Answer:

16.68 m/s

Explanation:

The following data were obtained from the question:

Height (h) = 14.2 m

Initial Velocity (u) = 0 m/s

Final velocity (v) =?

Thus, the velocity (v) with which the ball hit the ground can be obtained as follow:

v² = u² + 2gh

NOTE: the acceleration due to gravity (g) = 9.8 m/s²

v² = u² + 2gh

v² = 0² + 2 × 9.8 × 14.2

v² = 0 + 278.32

v² = 278.32

Take the square root of both side

v = √278.32

v = 16.68 m/s

Therefore, the velocity with which the ball hit the ground is 16.68 m/s

what can you infer about an ion that has a negative charge?

I NEED HELP FAST FOR MY TEST!!!

Answers

Answer:

It has more electrons than protons. It is an anion.

A liquid has a volume of 225 mL and a mass of 150 g. What is its density? Round your answer to 2 decimal places.

Answers

Answer:

The answer is 0.67 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{150}{225} = \frac{2}{3} \\ = 0.66666666...[/tex]

We have the final answer as

0.67 g/mL to two decimal places

Hope this helps you

need help asap
Calculate the frequency for a wavelength of 635 nm.

Answers

Answer:

472114107.086614 MHz

Explanation:

f = C/λ

λ: Wavelength in meters

C: Speed of Light (299,792,458 m/s)

is this correct? say something if it's wrong lol ​

Answers

Answer:

seFG9zuh98gufhIUAFIyhA*UGH8gguuguuuuuuuu

Explanation:

Answer:

Yes that look about right to me :)

A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the substance's specific heat in J/(gºC) ?

1.) 3.21

2.) 4.62

3.) 1,406.25

4.) 249,705

Answers

Answer:

i dont get the equation sorry wish i can help

4.62 is the correct answer

the amount of carbWhat is your carbon footprint?

the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuelson dioxide put into the atmosphere due to y

Answers

Answer:

D

Explanation:

Other Questions
The difference in the x-coordinates of two points is 3, and the difference in the y-coordinates of the two points is 6. Whatis the slope of the line that passes through the points?O 2O 30609 What Is PI.Don't Cheat Or No Points How to factor y^3 +2y^2 + 2y + 1 a. Describe the molecule chlorine dioxide, CIO in terms of three possible resonance structures. b. Do any of these resonance structures satisfy the octet rule for every atom in the molecule? Why or why not? Gabriela Mistral was a poet, diplomat, teacher and humanitarian. Each week she worked a certain amount of days as a poet diplomat teacher and humanitarian. This ratio was one day as a poet to one day as a diplomat to three days as a teacher to two days as a humanitarian how many days must she work as a humanitarian if she works 12 days as a teacher? what point is on the graph of f(x) =6^x Help me plz 8th grade math Retepson, Inc. has been in business for over 50 years. Retepson is best known for its Guide to Colleges line of books designed for high school students seeking admission to undergraduate programs. Basic information about a program is included in the books at no charge to the colleges, but colleges may purchase additional advertising space in the books for a fee. Traditionally, Retepson has made money by selling advertising in its books and by charging students for the books themselves. Recently, however, profits are down, and the company is considering whether it needs to change its corporate culture. Which of the following, if true, supports the conclusion that Retepson's culture should emphasize innovation? a) Anyone with Internet access can find any of the information included in the Guide to Colleges series. b) At the time that Retepson was founded, there was no easy way for students to find out basic information about a wide range of undergraduate programs. c) Most large colleges have found that the wide circulation of the Guide to Colleges line of books makes it worthwhile to purchase additional advertising space. d) Retepson's sales force has been able to prevent imitators from duplicating its success. e) Students seeking admission to selective colleges often adopt innovative approaches to their application essays in order to stand out from the group of applicants. what is 664,000 dived by 555,897 4. In Canadian coins, 16 quarters is equal in value to 2 toonies.number of quartersnumber of toonies11622024a. Fill in the table. when x=-4, what is the value of g(x) For generations, there has been only one, small, independently owned grocery store in your town. Plans for a large grocery chain to move in have just been approved. Consider the pros and cons of this new development for both the independent grocer and the local residents. COLLEpast dsee coA boat capsized and sank in a lake Based on an assumption of a mean weight of 131 lb, the boat was rated to carry 60 assengers (s the load lin was 7,860 lb).After the boat sank, the assumed mean weight for similar boats was changed from 131 lb to 173 lb Complete parts a and below.a. Assume that a similar boat is loaded with 60 passengers, and assume that the weights of people are normally distributed with a mea of 176 1 lb end a standarddeviation of 40.2 lb. Find the probability that the boat is overloaded because the 60 passengers have a mean weight greater than 131 ||The probability is(Round to four decimal places as needed)b. The boat was later rated to carry only 17 passengers, and the load limit was changed to 2,941 lb. Find the probability t at the boat is erloaded bause themean weight of the passengers is greater than 173 (so that their total weight is greater than the maximum capacity of 29 1 lb)The probability is(Round to four decimal places as needed)Do the new ratings appear to be safe when the boat is loaded with 17 passengers? Choose the correct answer below.sees oentssee scsee scopast doO A. Because the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appes to be safeOB. Because there is a high probability of overloading, the new ratings appear to be safe when the boat is loaded with passengersOC. Because there is a high probability of overloading, the new ratings do not appear to be safe when the boat is loaded with 17 passe ers:Click to select your answer(s)past due One of the main roles of police during the 19th century was "strike-breaking." Why did the police engage in these actions and who benefitted from these actions? The equation y=2x+10 describes the monthly cost to rent a movie at the localvideo kiosk, where x represents the number of movies rented and y represents thetotal cost. Find and describe the slope of this relationship. ridding the cell of material by discharging it from sacs at the cell surface is called pinocytosis phagocytosis exocytosis endocytosis Before humans ever ventured into space, we fantasized about visitingand even living onother planets. As technology continues to develop, it may one day be possible for humans to call planets other than Earth's home. Space scientists have several possible Earth-like planets and moons insight, but one that is of high interest is Kepler-186f, a planet 500 light-years away. It orbits a star much like the Sun, and it orbits in a habitable zone: it is far enough from the star to allow for the pooling of water (if it is present) on the planet's surface.Is being in a "habitable zone" enough to say the planet is habitable for human life? What characteristics would an Earth-like planet need to have to support life? What challenges would we face traveling to and colonizing Kepler-186f or other Earth-like planets outside of our solar system? Do you think scientists should spend time looking for Earth-like planets before we have the technology to visit them? Why or why not? PLEASE HELP ME!!! :(( 10 POINTS!! HELP ASAP!! What is the length of AC? Based only on the given information, it is guaranteed that Ac = bc Carolyn is looking over opinions based primarily on research studies. She has found that there are 31 of them in total. What organization is Carolyn researching?