On, Inc., publishing as pe6. Circle the letter before each element that is a gas at room temperature.
a. carbon
c. mercury
d. nitrogen
b. oxygen

Answers

Answer 1
Answer: -carbon
-oxygen
-nitrogen

Related Questions

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How much force is needed to accelerate a 68 kilogram skier at a rate of 1.2m/sec
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Which of the following best describes the difference between type a and type b

Scientists are working on a new technique to kill cancer cells by zapping them with ultrahigh-energy (in the range of 1012W) pulses of light that last for an extremely short time (a few nanoseconds). These short pulses scramble the interior of a cell without causing it to explode, as long pulses would do. We can model a typical such cell as a disk 5.0μm in diameter, with the pulse lasting for 4.0 ns with an average power of 2.0×1012W. We shall assume that the energy is spread uniformly over the faces of 100 cells for each pulse. (a) How much energy is given to the cell during this pulse? (b) What is the intensity (in W/m2) delivered to the cell? (c) What are the maximum values of the electric and magnetic fields in the pulse?

Answers

Answer:

a. 80 J/cell b. 1.02 × 10²¹ W/m² c. 8.77 × 10¹¹ V/m d. 2.92 × 10³ T

Explanation:

a. We know that energy E = Pt where P = power and t = time

The total energy delivered to all the 100 cells is E = average power × time

average power = 2 × 10¹² W and time = 4 ns = 4 × 10⁻⁹ s

E = 2 × 10¹² W × 4 × 10⁻⁹ s = 8 × 10³ J

The energy per cell E₁ = E/100 = 8 × 10³ J/100 = 80 J/cell

b. Intensity, I = P/A where P = power per cell = 2 × 10¹² W/100 = 2 × 10¹⁰ W and A = area = πr². Since the cell is modeled as a disk of diameter d = 5.0μm, r = d/2 = 5.0 μm/2 = 2.5 μm = 2.5 × 10⁻⁶ m

I = P/A = P/πr² = 2 × 10¹⁰ W/π(2.5 × 10⁻⁶ m)² = 1.02 × 10²¹ W/m²

c. The intensity I = E²/2cμ₀ where E = maximum value of electric field, c = speed of light = 3 × 10⁸ m/s and μ₀ = 4π × 10⁻⁷ H/m

E = √(I2cμ₀) = √(2 × 1.02 × 10²¹ W/m² × 3 × 10⁸ m/s × 4π × 10⁻⁷ H/m) = 8.77 × 10¹¹ V/m

The maximum magnetic field B is gotten from E/B = c

B = E/c = 8.77 × 10¹¹ V/m/3 × 10⁸ m/s  = 2.92 × 10³ T

A student squeezes several oranges to make a glass of orange juice. The juice contains pieces of orange pulp mixed with the juice. Explain why this drink can be considered a combination of a suspension and a solution.

Answers

Answer:

The juice contains sugars, plant pigments, and other chemicals dissolved in water. This is a solution.  The pieces of orange pulp will rise to the top or settle to the bottom of the juice if it is allowed to sit.  The pieces of pulp mixed with the juice form a suspension.

Explanation:

In chemistry, a suspension is a heterogeneous mixture containingsolid particles that are sufficiently large for sedimentation. Usually they must be larger than one micrometer. A Suspension is a heterogeneous mixture in which the soluteparticles do not dissolve but get suspended throughout the bulk of the medium.a solution is a homogeneous mixture composed of two or moresubstances. In such a mixture, a solute is a substance dissolved in another substance, known asa solvent.. it is considered a solution andsuspension because the orange juice mix with water while the pulp did not andretained as solid

A force of 34.5 newtons is applied to an object at an angle of 45 º with the horizontal. What is the force acting on the object in the horizontal direction?

Answers

The horizontal component of the force is 34.5 cos(45) = 24.4 newtons

The vertical component of the force is 34.5 sin(45) = 24.4 newtons

Answer:

24.4

Explanation:

I don't understand the physics work power and energy unit

Answers


Work and energy are the same thing.  Their unit is the Joule
One joule means the energy it takes to push with a force of 1 newton
through a distance of 1 meter.

The unit of power is the Watt.  That's the rate of work or energy. 
One watt means using 1 joule of energy (for example, push with a force of
1 newton through a distance of 1 meter), and doing that in exactly 1 second.


Poise under pressure, dealing with adversity, and self-esteem are all parts of which type of health? A. emotional health B. mental heal C. physical health D. social health

Answers

Answer:

The correct answer is option B, Mental Health

Explanation:

Mental health is referred to as mental illness when a person is bounded by prolonged negative thoughts. The ongoing signs and symptoms of a poor mental health can cause frequent stress and reduced ability to function. Some common symptoms of mental illness include

• Excessive anger, hostility or violence

• Extreme mood changes  

• Confused thinking or reduced ability to concentrate

• Excessive fears or worries

The answer is B.) Mental health

What is the approximate difference in elevation between Coolage Lake and the rectangular building in the top center portion of the map? A. 27 ft
B. 5 ft
C. 35 ft
D. 25 ft

Answers

The right answer for the question that is being asked and shown above is that:  "C. 35 ft." The approximate difference in elevation between Coolage Lake and the rectangular building in the top center portion of the map is that of C. 35 ft