Physics College

5. The reading of mercury barometer is at 70.0cm. What is the pressure at the place in N/m². (Assume density of mercury is 1.36 x 104 kg/m³)​

Answers

Answer 1

To calculate the pressure at a place based on the reading of a mercury barometer, you can use the following formula:

Pressure = Density x Gravitational Acceleration x Height

Given:

Density of mercury (ρ) = 1.36 x 10^4 kg/m³

Height (h) = 70.0 cm = 0.7 m (since pressure is usually measured in meters)

Gravitational Acceleration (g) can be assumed as 9.8 m/s².

Using the formula, we can calculate the pressure:

Pressure = ρ x g x h

= (1.36 x 10^4 kg/m³) x (9.8 m/s²) x (0.7 m)

≈ 91,168 N/m²

Therefore, the pressure at the place, based on the reading of the mercury barometer, is approximately 91,168 N/m².

Answer 2

The pressure at the given place is approximately 9.74 x 10^4 N/m².

Using the link between pressure and the height of a liquid column in a barometer, we may determine the pressure at the given location. Specifically, mercury serves as a liquid.

The equation P = gh, which takes P as the pressure, as the liquid's density, g as its gravitational acceleration, and the column's height, yields the pressure exerted by a column of liquid.

We can use the mercury's density of 1.36 x 10^4 kg/m3 and the mercury barometer's measurement of 70.0 cm, or 0.7 m, as substitutes in the formula.

P is calculated as (1.36 x 104 kg/m3) x (9.8 m/s2) x (0.7 m).

After computing this expression, we discover:

P ≈ 9.74 x 10^4 N/m²

As a result, the pressure at the location indicated is roughly 9.74 x 10^4 N/m2.

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Related Questions

MISSION REQUIREMENTS:
1. Design your Gigafood
Name your Gigafood and your food company (school appropriate)
Consider the components of your Gigafood
Sources of all of the essential nutrients
Macro: Carbohydrates, fats, proteins
Micro: Vitamins and minerals (don’t have to
include ALL of the different vitamins and
minerals)
Must contain at least 2 sources of antioxidants
2. Provide rationale (an explanation) for your Gigafood design
What is the purpose of each macro and micro nutrient?
What nutrient does each component provide?
How much of your Gigafood should someone eat?
(consider daily values)
3. Design your advertisement. You want to convince the world
that your Gigafood is the only food they will ever need.
Come up with a catchy slogan
Disclaimer to eating your Gigafood:
What are the health benefits?
Are there any risks?
What diseases or conditions will it help with?
Why should people consume your Gigafood?
4. A visual representation of your Gigafood and the advertisement
All of the components of your Gigafood should be visible
and labeled
Your advertisement should be visually appealing and
easily noticeable (see examples below)
TIPS FOR SUCCESS:
● Imagine that you are NOT limited by money or materials. You are
building your DREAM Gigafood!
● No ridiculous claims; your Gigafood cannot be the cure for cancer, or
make someone live forever.
● OPTIONAL: You MAY consider dietary restrictions, but if you consider
all the possibilities (ex. celiac, dairy free, vegetarian) you may have a
tough time constructing a food.
● Your Gigafood will likely contain 3-6 components (depending on your
choices) to include all of the necessary nutrients

Answers

I believe that Gigafood is the future of food. It is a healthy, convenient, and sustainable way to get all the nutrients our bodies need. I am excited to see how Gigafood can change the way people eat.

How to explain the food

Name: Gigafood

Company: Gigafood, Inc.

Components:

Whole wheat flourOatmealSoybeansEggsBerriesNutsNutrients:Macronutrients:Carbohydrates: 45%Fat: 25%Protein: 30%Micronutrients:Vitamins: A, B12, C, D, EMinerals: Calcium, Iron, Magnesium, Potassium, ZincAntioxidants: Berries and nuts

Gigafood is a complete and balanced meal that provides all the essential nutrients the body needs.

Macronutrients: Carbohydrates are the body's main source of energy. Fats provide essential fatty acids and help the body absorb vitamins. Protein is necessary for building and repairing tissues.

Micronutrients: Vitamins and minerals are essential for many bodily functions, including growth, development, and immunity.

Antioxidants: Berries and nuts are rich in antioxidants, which help protect the body against damage from free radicals.

Slogan: Gigafood: The only food you'll ever need.

Disclaimer: Gigafood is a healthy and nutritious food, but it is not a cure for any disease. It is important to eat a balanced diet and get regular exercise.

Health benefits:

Improved energy levelsWeight loss or maintenanceReduced risk of chronic diseases such as heart disease, stroke, and cancerImproved immunityIncreased lifespan

Diseases or conditions that Gigafood can help with:

Heart diseaseStrokeCancerDiabetesObesityAlzheimer's disease

Gigafood is a convenient and delicious way to get all the nutrients your body needs.

Gigafood is a healthy and sustainable choice for the environment.

Gigafood is a great way to save time and money on food.

The advertisement should be visually appealing and easily noticeable. It should use bright colors and simple graphics to capture attention. The advertisement should also include the Gigafood logo and slogan.

I believe that Gigafood is the future of food. It is a healthy, convenient, and sustainable way to get all the nutrients our bodies need. I am excited to see how Gigafood can change the way people eat.

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Tonya is modeling the discovery of electromagnetic induction. Which procedure should she use? moving a magnet into a coil of wire in a closed circuit moving a magnet into a coil of wire in an open circuit bringing a compass near a wire that has no electric current bringing a compass near a wire that has an electric current

Answers

To model the discovery of electromagnetic induction, Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Electromagnetic induction refers to the phenomenon of generating an electric current in a conductor by varying the magnetic field passing through it. This concept was discovered by Michael Faraday in the early 19th century. To model this discovery, Tonya needs to recreate the conditions that led to this breakthrough.

In Faraday's experiment, he observed that when a magnet is moved into or out of a coil of wire, it induces an electric current in the wire. This occurs when the magnetic field passing through the coil changes. Therefore, Tonya should use a similar setup to replicate this process.

Out of the given options, the most appropriate procedure for Tonya would be to move a magnet into a coil of wire in a closed circuit. By having a closed circuit, it means that the ends of the wire are connected to form a complete loop. When the magnet is moved into the coil, the changing magnetic field induces an electric current to flow through the wire.

This procedure demonstrates the principle of electromagnetic induction and shows how a changing magnetic field can produce an electric current. It allows Tonya to visually observe the effects of the induced current, which is essential in modeling the discovery of electromagnetic induction.

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What is the net force net
on an airplane window of area 1800 cm2
if the pressure inside the cabin is 0.95 atm
and the pressure outside is 0.76 atm
?

Answers

The net force on the airplane window of area 1800 cm² is 3469.47 Pa.m² .

Given:

Pressure inside the cabin: 0.95 atm

Pressure outside the cabin: 0.76 atm

Area of the airplane window: 1800 cm²

Now to find the net force on the airplane window, we can calculate the pressure difference between the inside and outside of the cabin and to calculate the pressure difference, we subtract the outside pressure from the inside pressure.

Pressure Difference = Pressure inside - Pressure outside

Pressure Difference = 0.95 atm - 0.76 atm

Pressure Difference = 0.19 atm

The area of the airplane window is given as 1800 cm². To simplify calculations in SI unit we convert the area to square meters:

Area in m² = (Area in cm²) / 10,000

Area in m² = 1800 cm² / 10,000

Area in m² = 0.18 m²

As we know,

Net Force = Pressure Difference * Area

Net Force = 0.19 atm * 0.18 m²

Net Force = 0.0342 atm·m²

To convert the net force to pascals (Pa), we use 1 atm = 101325 Pa. Multiplying the net force by 101325 Pa, we get

Net Force = 3469.47 Pa·m²

Therefore, the net force on the airplane window is approximately 3469.47 pascals times square meters (Pa.m²).

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wire (mass = 50 g, length = 40 cm) is suspended horizontally by two vertical wires which
conduct a current I = 8.0 A, as shown in the figure. The magnetic field in the region is into the
paper and has a magnitude of 60 mT. What is the tension in either wire?

Answers

The magnetic field in the region is into the paper and has a magnitude of 60 mT and the tension in either wire is 0.096 N.

To find the tension in either wire, we can apply the equation for the force experienced by a current-carrying wire in a magnetic field.

The force experienced by a current-carrying wire in a magnetic field is given by the equation F = B * I * L * sin(θ), where B is the magnetic field strength, I is the current, L is the length of the wire, and θ is the angle between the wire and the magnetic field.

In this case, the wire is suspended horizontally by two vertical wires, and the magnetic field is into the paper. Since the wire is horizontal, the angle between the wire and the magnetic field is 90 degrees, so sin(θ) = 1.

The force experienced by the wire due to the magnetic field is F = B * I * L.

Given:

Current (I) = 8.0 A

Magnetic field (B) = 60 mT = 60 * 10^(-3) T

Length of the wire (L) = 40 cm = 40 * 10^(-2) m

Substituting the given values into the equation, we get:

F = (60 * 10^(-3) T) * (8.0 A) * (40 * 10^(-2) m)

Simplifying the expression, we find:

F = 0.192 N

Since the wire is suspended by two vertical wires, the tension in each wire will be half of the total force. Therefore, the tension in either wire is 0.192 N / 2 = 0.096 N.

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Describe the setup of the electromagnet. Why does the wire need to be a conductive material?

Answers

An electromagnet consists of a conductive wire wrapped around a magnetic core, creating a magnetic field when an electrical current is passed through it.

An electromagnet is a type of magnet that is created by running an electrical current through a wire. The setup of an electromagnet involves a few basic components. First, there must be a wire that is conductive, meaning that it can conduct electricity. This wire is usually wrapped around a core, which is often made of iron, steel, or another magnetic material. When an electrical current is run through the wire, it creates a magnetic field around the wire. This magnetic field then magnetizes the core, creating an even stronger magnetic field. The strength of the electromagnet can be controlled by adjusting the amount of current that is run through the wire. The wire must be a conductive material because it needs to be able to carry the electrical current that creates the magnetic field. If the wire were not conductive, then the electrical current would not be able to flow through it, and the magnetic field would not be created. In summary, the setup of an electromagnet involves a conductive wire wrapped around a magnetic core, which is magnetized by the electrical current running through the wire. The wire must be conductive to carry the electrical current and create the magnetic field.

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Use the formula below to answer the question
IxV
An electrical circuit containing one lightbulb has a voltage of 3V and a
power of 3 W.
Calculate the current used by the lightbulb.
OA. 1 A
OB. 6 A
OC. 9A
D. 12 A
V=IxR p=i*v

Answers

The current used by the lightbulb is 1 Ampere (A). Therefore, the correct option is option(A) . 1 A.

To calculate the current used by the lightbulb, we can use Ohm's Law and the formula for power.

Ohm's Law states that the current (I) flowing through a conductor is equal to the voltage (V) across the conductor divided by the resistance (R) of the conductor. Mathematically, it can be expressed as I = V/R.

In this case, we are given the voltage (V) of 3V, but we don't have the resistance (R) directly. However, we can use the formula for power (P) in terms of current and voltage: P = I * V.

We are given that the power (P) of the lightbulb is 3W. Therefore, we can rewrite the formula for power as I = P/V.

Substituting the values, we have I = 3W / 3V, which simplifies to I = 1A.

Hence, the current used by the lightbulb is 1 Ampere (A). Therefore, the correct option is OA. 1 A.

It's important to note that plagiarism is not tolerated, and the response provided here is an original explanation based on fundamental electrical principles. If you need further assistance or have any additional questions, feel free to ask.

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