The corresponding absolute pressure would be the sum of the gauge pressure and the atmospheric pressure at sea level. The atmospheric pressure at sea level is approximately 101,325 Pa. Therefore, the absolute pressure at the bottom of the tank would be:
Absolute pressure = 301,325 Pa
The corresponding absolute pressure at the bottom of the tank would be 301,325 Pa. The absolute pressure at the bottom of the tank can be calculated using the formula:
Absolute Pressure = Gauge Pressure + Atmospheric Pressure
Given the gauge pressure is 200,000 Pa, and the atmospheric pressure at sea level is approximately 101,325 Pa, we can find the absolute pressure:Absolute Pressure = 200,000 Pa + 101,325 Pa = 301,325 Pa
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Calculate the angular separation of two Sodium lines given as 580.0nm and 590.0 nm in first order spectrum. Take the number of ruled lines per unit length on the diffraction grating as 300 per mm?
(A) 0.0180
(B) 180
(C) 1.80
(D) 0.180
The angular separation of two Sodium lines is calculated as (C) 1.80.
The angular separation between the two Sodium lines can be calculated using the formula:
Δθ = λ/d
Where Δθ is the angular separation, λ is the wavelength difference between the two lines, and d is the distance between the adjacent ruled lines on the diffraction grating.
First, we need to convert the given wavelengths from nanometers to meters:
λ1 = 580.0 nm = 5.80 × 10⁻⁷ m
λ2 = 590.0 nm = 5.90 × 10⁻⁷ m
The wavelength difference is:
Δλ = λ₂ - λ₁ = 5.90 × 10⁻⁷ m - 5.80 × 10⁻⁷ m = 1.0 × 10⁻⁸ m
The distance between adjacent ruled lines on the diffraction grating is given as 300 lines per mm, which can be converted to lines per meter:
d = 300 lines/mm × 1 mm/1000 lines × 1 m/1000 mm = 3 × 10⁻⁴ m/line
Substituting the values into the formula, we get:
Δθ = Δλ/d = (1.0 × 10⁻⁸ m)/(3 × 10⁻⁴ m/line) = 0.033 radians
Finally, we convert the answer to degrees by multiplying by 180/π:
Δθ = 0.033 × 180/π = 1.89 degrees
Rounding off to two significant figures, the answer is:
(C) 1.80
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An air puck of mass m
1
= 0.25 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of m
2
= 1.0 kg is tied to it. The suspended mass remains in equilibrium while the puck on the tabletop revolves.
(a) What is the tension in the string?
(b) What is the horizontal force acting on the puck?
(c) What is the speed of the puck?
(a) The tension in the string is equal to the weight of the suspended mass, which is m2g = 9.8 N.
(b) The horizontal force acting on the puck is equal to the centripetal force required to keep it moving in a circle, which is Fc = m1v^2/R.
(c) The speed of the puck can be calculated using the equation v = sqrt(RFc/m1).
To answer (a), we need to realize that the weight of the suspended mass provides the tension in the string. Therefore, the tension T = m2g = (1.0 kg)(9.8 m/s^2) = 9.8 N.
For (b), we use Newton's second law, which states that F = ma. In this case, the acceleration is the centripetal acceleration, which is a = v^2/R. Therefore, Fc = m1a = m1v^2/R.
Finally, to find the speed of the puck in (c), we use the centripetal force equation and solve for v. v = sqrt(RFc/m1) = sqrt((1.0 m)(m1v^2/R)/m1) = sqrt(Rv^2/R) = sqrt(v^2) = v.
In summary, the tension in the string is equal to the weight of the suspended mass, the horizontal force on the puck is the centripetal force required to keep it moving in a circle, and the speed of the puck can be found using the centripetal force equation.
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The net force on any object moving at constant velocity is a. equal to its weight. b. less than its weight. c. 10 meters per second squared. d. zero.
The net force on any object moving at constant velocity is zero. Option d. is correct .
An object moving at constant velocity has balanced forces acting on it, which means the net force on the object is zero. This is due to Newton's First Law of Motion, which states that an object in motion will remain in motion with the same speed and direction unless acted upon by an unbalanced force. This is due to Newton's first law of motion, also known as the law of inertia, which states that an object at rest or in motion with a constant velocity will remain in that state unless acted upon by an unbalanced force.
When an object is moving at a constant velocity, it means that the object is not accelerating, and therefore there must be no net force acting on it. If there were a net force acting on the object, it would cause it to accelerate or decelerate, changing its velocity.
Therefore, the correct answer is option (d) - the net force on any object moving at a constant velocity is zero.
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Consider three identical metal spheres, a, b, and c. sphere a carries a charge of 5q. sphere b carries a charge of -q. sphere c carries no net charge. spheres a and b are touched together and then separated. sphere c is then touched to sphere a and separated from it. lastly, sphere c is touched to sphere b and separated from it.
required:
a. how much charge ends up on sphere c?
b. what is the total charge on the three spheres before they are allowed to touch each other?
a. Sphere c ends up with a charge of -3q.
b. The total charge on the three spheres before they are allowed to touch each other is 5q - q = 4q.
a. When spheres a and b are touched together and then separated, charge is transferred between them until they reach equilibrium. Since sphere a has a charge of 5q and sphere b has a charge of -q, the total charge transferred is 5q - (-q) = 6q. This charge is shared equally between the two spheres, so sphere a ends up with a charge of 5q - 3q = 2q, and sphere b ends up with a charge of -q + 3q = 2q.
When sphere c is touched to sphere a and separated, they share charge. Sphere a has a charge of 2q, and sphere c has no net charge initially. The charge is shared equally, so both spheres end up with a charge of q.
Similarly, when sphere c is touched to sphere b and separated, they also share charge. Sphere b has a charge of 2q, and sphere c has a charge of q. The charge is shared equally, so both spheres end up with a charge of (2q + q) / 2 = 3q/2.
Therefore, sphere c ends up with a charge of -3q (opposite sign due to excess electrons) and the total charge on the three spheres before they are allowed to touch each other is 5q - q = 4q.
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