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
Ludmilka [50]
4 years ago
11

What's a difference between mercury and oxygen? (They both are elements)

Physics
1 answer:
borishaifa [10]4 years ago
8 0

--  There are 80 protons in the nucleus of every atom of Mercury,
but only 8 of them in the nucleus of an atom of Oxygen.

-- Mercury must be warmer than 357°C in order to boil, but Oxygen
must only be warmer than -183°C.

--  Mercury must be colder than -39°C in order to freeze, but Oxygen
must be colder than -219°C.

--  Oxygen is required for human life.  Mercury is a deadly poison.

You might be interested in
How many picoseconds are there in 1 Ms- show work
Naily [24]

There are 10⁹ picoseconds in 1 Ms

1 picosecond= 10¹² s

1 Ms = 10⁻³ s

so the number of picoseconds in one Ms=(10⁻³ s/1 Ms) * (10¹² Ps/ 1 s)=10⁹

Thus there are 10⁹ picoseconds in 1 Ms

7 0
3 years ago
When we walk, our legs alternatively swing forward about the hip joint as a pivot. In this motion the leg is acting approximatel
patriot [66]

Answer:

0.3 seconds

Explanation:

When we walk, our legs alternatively swing forward about the hip joint as a pivot. In this motion the leg is acting approximately as a physical pendulum. Treating the leg as a thin uniform rod of length 0.80 m,

To find the time it takes for the leg to swing forward, where g = 9.8 m/s^2

Let's use the simple pendulum formula which says that:

T = 2π( sqrt ( L/g))

T = 2π[sqrt (0.8/9.8)]

T = 2π × 0.082

T = 0.5129

For the leg to swing forward only, the number of complete oscillations will be half.

Period T = time t ÷ number of complete oscillations. That is,

T = t ÷ 1/2

0.5129 = t ÷ 1/2

t = 0.5129 × 1/2

Time t = 0.256 seconds.

Therefore, the time it takes for the leg to swing forward is 0.3 seconds approximately

7 0
3 years ago
What is the magnitude of the acceleration of a speck of clay on the edge of a potter's wheel turning at 45 rpm (revolutions per
Brilliant_brown [7]

Answer:

a_{cp}=7.77m/s^2

Explanation:

The equation for centripetal acceleration is a_{cp}=\frac{v^2}{r}.

We know the wheel turns at 45 rpm, which means 0.75 revolutions per second (dividing by 60), so our frequency is f=0.75Hz, which is the inverse of the period T.

Our velocity is the relation between the distance traveled and the time taken, so is the relation between the circumference C=2\pi r and the period T, then we have:

v=\frac{C}{T}=2\pi r f

Putting all together:

a_{cp}=\frac{(2\pi r f)^2}{r}=4 \pi^2f^2r=4 \pi^2(0.75Hz)^2(0.35m)=7.77m/s^2

4 0
3 years ago
Relate the changes in molecular motion of particles as they change from solid to liquid to gas
hammer [34]

Answer: Here's your answer friend,

Explanation:

1.Solid to Liquid --When a solid is heated the particles gain energy and start to vibrate faster and faster. ... Although the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid. The particles in the liquid are the same as in the solid but they have more energy.

2.Liquid to Gas--Vaporization occurs when a substance changes from a liquid to a gas. The molecules in a liquid are in constant motion while staying relatively close together due to intermolecular forces. When an increase in temperature occurs, the molecules' kinetic energy also increases.

5 0
3 years ago
A pressure cooker is a pot whose lid can be tightly sealed to prevent gas from entering or escaping. Even without knowing how bi
MariettaO [177]

Answer:

3801.13 N

Explanation:

Pressure exerted on a surface is equivalent to applied force divided by the cross sectional area. Then, the applied force will be equal to the product of the pressure exerted and the cross sectional area.

Where given:

Atmospheric pressure (P1) = 1.013*10^5 Pa

T1 =  20+273.15 = 293.15 K

P2 = ?

T2 = 120+273.15 = 393.15 K

Using the gas equation: P1/T1 = P2/T2

Therefore, P2 = P1*T2/T1 = 1.013*10^5 *393.15/293.15 = 13.6*10^4 Pa

The net pressure = P2 - P1 = 13.6*10^4 - 1.013*10^5 = 34.6 kPa

The net force F_{120} = net pressure * area

Area = 0.11 m^2

Thus:  

The net force F_{120} = 34555.7*0.11 = 3801.13 N

6 0
4 years ago
Other questions:
  • Find the density of seawater at a depth where the pressure is 950 atm if the density at the surface is 1100 kg/m3. Seawater has
    12·1 answer
  • g Two boxes with a mass of 34 kg each are resting on a surface where the coefficient of static friction is LaTeX: \mu_sμ s = 0.4
    14·1 answer
  • A car moved 60 meters west in 2 hours. What is its average velocity?
    15·1 answer
  • Ionic solutes are considered strong electrolytes. What does this mean for the conductivity of the solution?
    15·2 answers
  • Does this make sense to anyone?
    9·2 answers
  • A researcher’s background can influence the ____________ of experimental results.
    11·1 answer
  • A brightly-colored flower is probably pollinated by an insect that is attracted to that color. true or false ?
    14·2 answers
  • 7) Se calcula dividiendo distancia entre tiempo
    12·1 answer
  • A car travelling at 10 m/s has 75 kJ of KE. Calculate the car’s mass.<br><br> Will give brainliest
    12·1 answer
  • The electric potential at the dot in the figure is 3160 V. What is charge q?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!