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
joja [24]
2 years ago
5

Which hypothesis is testable using a scientific experiment? O A. Ancient people liked iron tools better than copper tools. O B.

Copper statues look prettier than iron statues. O C. A 100 g iron bar is worth more money than a 100 g copper bar. O D. A copper wire conducts electricity better than an iron wire.​
Chemistry
1 answer:
Elenna [48]2 years ago
7 0

Answer:The answer would be D.

Explanation:

Conductivity can be tested.

You might be interested in
Which of the following elements would you expect to be extremely explosive in the presence of water?
Natali5045456 [20]
The answer is a. Sodium
6 0
2 years ago
Read 2 more answers
The weight of a sack potato in india is 50kgf. will the weight increase or decrease in bhutan. why​
AfilCa [17]

Answer:

Assume that the sack was initially close to the sea level. Its weight will increase even though its mass stays the same.

Explanation:

The weight of an object typically refers to the size of the planet's gravitational attraction (a force) on this object. That's not the same as the mass of the object. The weight of an object at a position depends on the size of the gravitational field there; on the other hand, the mass of the object is supposed to be same regardless of the location- as long as the object stays intact.

Let g denote the strength of the gravitational field at a certain point. If the mass of an object is m, its weight at that point will be m \cdot g.

Indeed, g \approx 9.81\; \rm N \cdot kg^{-1} on many places of the earth. However, this value is accurate only near the sea level. The equation for universal gravitation is a more general way for finding the strength of the gravitational field at an arbitrary height. Let G denote the constant of universal gravitation, and let M denote the mass of the earth. At a distance r from the center of the earth (where

\displaystyle g \approx \frac{G \cdot M}{r^2}.

The elevation of many places in Bhutan are significantly higher than that of many places in India. Therefore, a sack of potato in Bhutan will likely be further away from the center of the earth (larger r) compared to a sack of potato in India.

Note, that in the approximation, the value of g is (approximately, because the earth isn't perfectly spherical) inversely proportional to the distance from the center of the planet. The gravitational field strength

On the other hand, the weight of an object of fixed mass is proportional to the gravitational field strength. Therefore, the same bag of potatoes will have a smaller weight at most places in Bhutan compared to most places in India.

6 0
2 years ago
Why does nitric oxide (no) act as a paracrine signal that affects only neighboring cells?
VMariaS [17]

The correct answer is due to rapid conversion of nitrates into nirites in extracellular fluids.

Due to the fact that it is quickly transformed to nitrates and nitrites in the extracellular fluid, nitric oxide (NO) functions as a paracrine signal that only impacts nearby cells. Because it relaxes the smooth muscle cells in blood vessel walls, nitric oxide (NO) causes blood vessels to widen. Cell signaling is a type of cellular communication in which a cell produces a signal to cause changes in neighboring cells, changing the behavior of those cells. Paracrine signaling is one type of cell signaling. Responses to allergens, tissue repair, the development of scar tissue, and blood clotting are a few examples of paracrine signaling. The transmission of signals through synapses between nerve cells is known as paracrine signaling.

Learn more about paracrine signal here :-

brainly.com/question/12538424

#SPJ4

5 0
1 year ago
Which molecule has a high specific heat?<br><br> a) C2H6<br> b) C2H6O<br> c) H2O
dem82 [27]
H2O is the correct answer :)
4 0
2 years ago
In regard to protective actions for explosive devices, the area where the blast originates is referred to as ___________ perimet
lianna [129]
This is to fill in the answer to the question.

The area where the blast originates is referred to as <span>Scene Perimeter/Isolation Zone. This whole area is dangerous for people since it can contain harmful gasses or falling debris depending on the environment of the blast. 


</span>
7 0
2 years ago
Other questions:
  • What's the difference between a molecule and a particle​
    8·1 answer
  • Plz answer quickly with explanations. .....
    8·1 answer
  • Which picture shows the correct flow of electrical current
    8·2 answers
  • The diffusion coefficient for sodium ions crossing a biological membrane 12nm thick is 1.5 x10-18 m2/s. what flow rate of sodium
    13·1 answer
  • Why do positive ions have a positive charge?​
    8·1 answer
  • The atmosphere surrounding Earth helps to maintain the various climates found around the world and keeps Earth from becoming ext
    9·1 answer
  • Which of the following best defines base isolation?(1 point)
    6·1 answer
  • Convert 0.859 mg to cg.<br> Help me plz :(
    9·1 answer
  • Which statement describes vascular plants?
    10·1 answer
  • The equilibrium constant, Kc, is calculated using molar concentrations. For gaseous reactions another form of the equilibrium co
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!