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
olchik [2.2K]
3 years ago
5

Many of water's emergent properties, such as its cohesion, its high specific heat, and its high heat of vaporization, result fro

m the fact that water molecules _____.1.are extremely large2.tend to repel each other3.are in constant motion4.are very small5.are attracted to each other by partial negative and positive charges on the oxygen and hydrogen atoms, respectively
Physics
1 answer:
Bingel [31]3 years ago
3 0

Answer:

Option 5.

Explanation:

Many of the properties of water like high specific heat, cohesion, high vaporization heat, etc can be contributed to the polar nature of water molecule.

Water being a polar molecule as it contains positively charged hydrogen and an electro-negative oxygen which results in uneven or non uniformity in sharing of electrons which leads to dipole formation and hence polarization of the molecule due to which it attracts its neighboring molecules.

This polar nature imparts the properties like cohesion, surface tension , adhesion, etc due to the presence of hydrogen bonds in water molecule.

You might be interested in
James decides to walk home from school today. He lives 3 miles from school and can walk home in 45 minutes. At what rate is Jame
Kaylis [27]
B 1 mile/15 minutes is the right one
3 0
2 years ago
A 3.00N rock is thrown vertically into the air from the ground. At h=15.0m, v=25m/s upward. Use the work-energy theorem to find
butalik [34]

Answer:

so initial speed of the rock is 30.32 m/s

correct answer is b. 30.3 m/s

Explanation:

given data

h = 15.0m

v = 25m/s

weight of the rock m = 3.00N  

solution

we use here work-energy theorem that is express as here

work = change in the kinetic energy    ..............................1

so it can be written as

work = force × distance     ...................2

and

KE is express as

K.E = 0.5 × m × v²  

and it can be written as

F × d = 0.5 × m × (vf)² - (vi)²      ......................3

here

m is mass and vi and vf is initial and final velocity

F = mg = m  (-9.8)  , d = 15 m and v{f} = 25 m/s

so put value in equation 3 we get

m  (-9.8) × 15 = 0.5 × m × (25)² - (vi)²

solve it we get

(vi)² =  919

vi = 30.32 m/s

so initial speed of the rock is 30.32 m/s

5 0
3 years ago
5.3 two 30 kg children in a 20 kg cart are stationary at the top of a hill. They start rolling down the 80 m tall hill and they
Makovka662 [10]

Answer:

<em>60008.4 J</em>

<em></em>

Explanation:

The mass of each kid = 30 kg

mass of the cart = 20 kg

The speed of the cart down the hill = 30 km/hr = 30 x 1000/3600 = 8.33 m/s

The height of the hill = 80 m

The potential energy of the boys at the top of the hill = mgh

where

m is the total mass of the kids and the cart = (30 x 2) + 20 = 80 kg

g is the acceleration due to gravity = 9.81 m/s^2

h is their height above the ground = 80 m (on the top of the hill)

substituting, we have

potential energy PE = 80 x 9.81 x 80 = 62784 J

At an instance at the bottom of the hill

their kinetic energy = \frac{1}{2} mv^2

where

v is their velocity = 8.33 m/s

m is their total mass = 80 kg

substituting, we have

kinetic energy KE = \frac{1}{2}*80*8.33^2 = 2775.6 J

Total work done on the cart is equal to the energy lost by the cart when it reached the bottom of the hill

work done by friction = PE - KE = 62784 - 2775.6 = <em>60008.4 J</em>

5 0
3 years ago
Suppose an air bubble is trapped in the eudiometer before starting the experiment. After the experiment is finished, the resulti
seraphim [82]

Answer:

Explanation:

The resulting valie would be too large

8 0
2 years ago
Name some devices we use to make measurements
NikAS [45]

Answer:

Explanation:

Ruler. A steel ruler aids the measurement and layout of straight lines. The ruler, also called "straightedge" or "straight-edged ruler," is a long, thin strip of wood, metal or plastic marked with increments of measurement.

Measuring Tape. The modern measuring tape's roughly palm-sized casing contains a coiled strip of metal marked with increments of measurement. The metal strip, called "tape," attaches to a spring which automatically retracts the tape into the casing following use.

Walking Tape Measure. The walking tape measure, also called "surveyor's measure," records the distance traveled by a wheel. An operator pushes the measure's wheel, similar to a bicycle wheel, by a handle as an attached ticker box displays feet or meters in the same format as a car's odometer.

Laser Measure. The laser measure offers point and shoot distance measurement. In its most basic form, a laser measure is a hand-held electronic device with a digital display.

4 0
2 years ago
Other questions:
  • The impulse experienced by a body is equivalent to the body’s change in?
    11·1 answer
  • Which of the following is most likely to be an observation made by a physiologist
    11·1 answer
  • How much force is required to accelerate a 2kg mass at 3 m/s2? answer key?
    10·1 answer
  • what is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons
    12·1 answer
  • When an object moved in a circle ___ acts to accelerate the object toward the center of that cirlce
    14·2 answers
  • Van finds a metamorphic rock as he is exploring a small ravine near his house. Metamorphic rock is a type of rock that has gone
    15·2 answers
  • A motobike's tire rotates with a constant angular speed of 62.8 rad/s. The radius of a tire is 30cm. Assuming that no slipping o
    12·1 answer
  • What's unique about the philosophical approach to the question of truth?
    12·1 answer
  • What are the physical and chemical properties of sodium?
    5·1 answer
  • a steam engine work on its vicinity 285 k heat is released with the help of 225 c energy absorbed to the system what is the effi
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!