A bag weighing 20 newtons is lifted 2 meters onto a shelf. How much work has been done?

In a penumbral lunar eclipse, "all parts of the moon are partly, not totally, shaded from the sun.

A penumbral lunar eclipse occurs when the Earth moves between the Sun and the Moon, but the three celestial bodies do not form a perfect line. This causes the Earth's outer shadow, called the penumbra, to fall on the Moon.

During a penumbral lunar eclipse, the Moon does not pass through the darkest part of the Earth's shadow (the umbra), so the Moon is only partly shaded from the sun, and the eclipse is usually not as noticeable as a total or partial lunar eclipse.

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Answer:

the density is 2

Explanation:

p= m/v

p is density

m is mass

v is volume

6/3 = 2

Answer:

348

Explanation:

because maths ;)

The box of macaroni are in the shape of a cuboid, and the volume of the cuboid in the same unit will be 348 cm.

A three-dimensional space's volume can be calculated.  It is frequently expressed in numerical form using SI-derived units or by different imperial units (such as the gallon, quart, and cubic inch). Volume and length are related by the definition of length (cubed). In contrast to how much space the container occupies, the volume of a container is typically thought of as its carrying capacity or the amount of fluid (liquid or gas) that it could hold.

According to the question, the given values are :

Length, l = 16 cm

Width, b = 7.5 cm

Height, h = 2.9 cm

So, the volume of the Cuboid will be, V : l × b × h

V = 16 × 7.5 × 2.9

V = 348 cm³.

Hence, the volume of macaroni box will be 348 cm³.

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For a lunar eclipse to occur, the Sun, Earth, and Moon must be roughly aligned in a line. Otherwise, the Earth cannot cast a shadow on the Moon's surface and an eclipse cannot take place. When the Sun, Earth, and Moon come together in a straight line, a total lunar eclipse takes

The density of chlorine gas at 1.21 atm and 34.9°C is 3.21 g/L. This calculation was done using the ideal gas law

To calculate the density of chlorine gas, we can use the ideal gas law: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin. We need to rearrange the formula to solve for density, which is mass per unit volume:

density = (mass of gas) / (volume of gas)

= (n x M) / V

where M is the molar mass of chlorine (70.9 g/mol).

First, we need to convert the temperature to Kelvin:

T = 34.9°C + 273.15

= 308.05 K

Next, we can use the given pressure and temperature to find the volume of the gas using the ideal gas law:

V = (nRT) / P

where R = 0.08206 L atm/(mol K)

V = (n x R x T) / P

= (1 x 0.08206 x 308.05) / 1.21

= 2.11 L

Finally, we can use the volume and molar mass to find the density:

density = (n x M) / V

= (1 x 70.9) / 2.11

= 3.21 g/L

The density of chlorine gas at 1.21 atm and 34.9°C is 3.21 g/L. This calculation was done using the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas to its physical properties.

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Answer:

Explanation:

Answer:

Long short

Explanation:

1

Dogs that are bigger are selected to be parents.

2

The parents are bred together, and their offspring will be different sizes.

3

The biggest offspring will be selected and bred together.

4

This cycle continues until the dogs have been selectively bred to be bigger than the current world record size.

5

Selective breeders need to ensure that they are not also selecting for disadvantageous traits, like genetic limb defects.

Ur gonna need this...

Brainliest plzzz..thanks..sorry Messy

Answer:

Geological and atmospheric changes happening over a long time scale can cause short extinctions.

Explanation:

Answer: b) - 8.0 \(m/s^{2}\)

Explanation: Acceleration is a vector indicating a rate an object's velocity changes over time:

a = \(\frac{v}{t}\)

and its SI unit is \(m/s^{2}\)

For the minivan to stop, it takes a period of 0.5s:

a = \(\frac{4.0}{0.5}\)

a = 8.0 \(m/s^{2}\)

As a vector, acceleration has magnitude (8\(m/s^{2}\)) and direction. Since it is stopping, the minivan has a direction opposite to the other car, which means acceleration is negative. So: a = \(- 8.0 m/s^{2}\).

Answer:

the three are scavengers predators and decomposers

Explanation:

The three biotic factors that can affect an organism after death are scavengers, predators, and decomposers that can breakdown and destroy the organism. an abiotic factor that can prevent the organism from becoming preserved after it has been buried would be groundwater.

Answer:

156.28m

Explanation:

Given;

His displacement is 900 m 80° North of west

Let North and South represent y axis and west east represent axis.

the x component of his displacement vector can be written as;

dx = dcosθ

Where d is the resultant displacement = 900m

θ is the angle with the x axis = 80°

Substituting the values;

dx = 900cos80°

dx = 156.2833599002 m

dx = 156.28 m

the x component of his displacement vector is 156.28m

Final velocity = 57.8m/s

What is acceleration?

In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object

Acceleration = (Initial velocity - Final velocity) /time

Given,

time = 3.4s

Acceleration = 17 m/s^2

17 = (0-v)/3.4

final velocity = 17 X 3.4 = 57.8 m/s

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The statement "charged particles that move in liquids to create electric current" is true. They can create an electric current.

When charged particles, such as ions, are present in a conductive liquid, they can carry electrical charge and move in response to an applied electric field.

This movement of charged particles constitutes an electric current. The liquid through which the charged particles move is typically referred to as an electrolyte.

Examples of electrolytes include solutions of salts, acids, or bases. In various electrochemical processes, such as batteries and electroplating, the movement of charged particles within a liquid medium plays a crucial role in generating and sustaining electric currents.

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Complete question :

Charged particles that move in liquids to create electric current. T/F

Answer:it is c i just did it and got it right. :3

Explanation:

Explanation:

Generally, stream flows are measured in CFS   = Cubic Feet per Second

Answer:

You should still workout 90 min.

The proper time is measured by a single clock in a single place.

The proper time on earth is 90 min.

The clock on the rocket is also in a single place in the frame of the rocket so you still need to workout for 90 min.

By being wary of these factors and following the recommended guidelines, you can ensure the safe and effective use of hemoconcentrators in medical procedures.

When using hemoconcentrators, it's essential to be cautious and consider a few factors to ensure their safe and effective use. Some things to be wary of with hemoconcentrators include:
1. Compatibility: Make sure the hemoconcentrator is compatible with your specific application and equipment to avoid any malfunctions or complications during the procedure.
2. Clotting risks: Hemoconcentrators can sometimes lead to increased blood clotting risks. Ensure appropriate anticoagulation measures are in place during the procedure to minimize this risk.
3. Flow rate: Be mindful of the blood flow rate through the hemoconcentrator. Exceeding the recommended flow rate could lead to hemolysis or other complications.
4. Sterility: Maintain a sterile environment and follow proper handling procedures to prevent contamination, which could potentially lead to infection.
5. Monitoring: Closely monitor the patient's vital signs, blood pressure, and fluid balance during the procedure to promptly identify and address any adverse reactions or complications.

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The major characteristic an organic compound has which an inorganic

compound doesn't  have is the presence of carbon atoms in the molecule.

This helps us to differentiate the compounds into their respective divisions.

Inorganic compounds

Organic compounds

We can observe that inorganic compounds lack carbon atoms which makes

the answer valid.

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Answer:

B and E because yk thats the asnwer

The frequency heard by the passenger on the second train is approximately 319.75 Hz.

To calculate the frequency heard by a passenger on a train moving in the opposite direction to another train, we can use the concept of the Doppler effect. The Doppler effect describes the change in frequency of a wave (sound, in this case) when the source of the wave and the observer are in relative motion.

Let's break down the given information

Speed of sound in still air: v = 344 m/s

Speed of the first train: v₁ = 30.0 m/s

Frequency of the note emitted by the train whistle: f₁ = 277 Hz

Speed of the second train (moving in the opposite direction to the first): v₂ = 18.0 m/s

The formula for calculating the observed frequency (f₂) due to the Doppler effect when the observer and source are moving towards each other is

f₂ = (v + v₂) / (v - v₁) × f₁

where:

f₂ is the observed frequency

v is the speed of sound in air

v₂ is the speed of the observer (passenger on the second train)

v₁ is the speed of the source (first train)

f₁ is the frequency of the source (note emitted by the train whistle)

Plugging in the values into the formula, we can calculate the observed frequency:

f₂ = (v + v₂) / (v - v₁) × f₁

= (344 + 18.0) / (344 - 30.0) × 277

Simplifying this equation gives

f₂ = 362 / 314 × 277

Calculating the numerical value

f₂ ≈ 319.75 Hz

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-- The given question is incomplete, the complete question is

"A railroad train is travelling at 30.0 m/s in still air. The frequency of the note emitted by the train whistle is 277 Hz . The speed of sound is 344 m/s. What frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/s and approaching the first?"

Answer:

135

Explanation:

15grams of water + 120 grams of beaker=135 grams together

Answer:

15 grams + 120 grams =135 grams all together

Answer:

The GPE, stored is 640 Joules

Explanation:

The given parameters are;

The given mass of the astronaut, m = 80 kg

The height of the top of the lunar lander to which the astronaut climbs, h = 5 m

The gravity strength on the moon, g = 1.6 N/kg

The Gravitational Potential Energy, GPE, stored is given according to the following equation;

GPE stored = m·g·h

Therefore, by substituting the known values, we have;

GPE Stored = 80 kg × 1.6 N/kg × 5 m = 640 Joules

The GPE, stored = 640 Joules.

Answer:

65.74 km/hr

Explanation:

KE = 1/2mv²

I'm assuming the KE is 1.1x10⁴ J ?  It's hard to tell from what you wrote.

1.1x10⁴ J = 1/2(66 kg)v²

v² = 2(1.1x10⁴ J) / (66 kg) = 333.3 m²/s²

v = √333.3 m²/s² = 18.26 m/s

convert m/s to km/hr:

18.26 m/s x 1 km/1000 m x 3600 s/hr = 65.74 km/hr

The materials which are more resistant to electricity are called insulators. Materials like wood, plastics, rubber etc are insulators. They can be used in protective coatings.

There are three type of materials based on their conductivity. Substances which are most conductive at room temperature are called conductors. Materials which are not conducting at normal conditions but can conduct at higher temperature or on doping are called semiconductors.

Materials which are not conducting at any condition are called insulators. Insulators are thus resistant to electricity or to the passage of electrons. Metals are all conductors. Silicon and germanium are examples of semiconductors.

Materials like wood, plastics, rubber, glass, and other ceramic materials are insulators. Insulators can be used as protective coating from electric shock.

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Answer:

I do I make a brinliest can you please can me

Answer:

Because of the given stranded wires is that it's thinner there are even more air gaps and a greater surface area in the individual stranded wires then therefore it carries less current than similar solid wires can with each type of wire , insulations technologies can greatly assist in reducing power dissipation.

According to the National Fire Protection Association (NFPA) 1 Fire Code, a temporary combustible structure covering 2,000 sq ft should be at least 20 feet away from any other building.

This is to minimize the risk of fire spread from the temporary structure to other nearby buildings. However, it is important to note that local fire codes and regulations may vary and may have different requirements for the distance between buildings and temporary structures. It is always best to consult with local authorities and follow their guidelines to ensure safety and compliance. Additionally, it is important to take extra precautions when dealing with combustible materials and structures to prevent fires and ensure the safety of individuals and property.

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The distance a temporary combustible structure should be from another building varies by location's fire codes, yet a common suggestion is 30 feet. This rule is in place to prevent the rapid spread of fire. However, local building and fire codes provide the most accurate requirement.

Unfortunately, the question doesn't specify a standard distance, and thus the information can very according to different fire codes that vary by location, but a common rule mentioned in many fire safety guidelines suggests a temporary combustible structure covering 2,000 square feet should ideally be at least 30 feet away from any other building. This distance exists to reduce the risk of fire spreading rapidly from one structure to another. However, for a precise requirement, it would be crucial to consult the local building and fire codes.

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Each point along the track of one solar mass star represents the star's surface temperature and luminosity at one time.

A star having a mass equal to the mass of the Sun is called a one-solar mass star.

Its life track shows the luminous intensity as well as the surface temperature.

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The dimension of a/b where x is the distance and t is the time is T

Given the expression

x = at + bt²

where

x is the distance

t is the time

Based on the homogeneity principle, the expression on the left-hand side must be equal to that on the right. Hence;

x = at

\(a = \frac{x}{t}\)

Since x is the distance and distance is measured in metres, the dimension equivalent will be the length 'L'

Since t is the time and time is measured in seconds, the dimension equivalent will be the seconds 'T'

\(a=\frac{L}{T}\)

Similarly;

x  = bt²

\(b=\frac{x}{t^2}\\b=\frac{L}{T^2}\)

Next is to get a/b;

\(\frac{a}{b} = \frac{L}{T} \div \frac{L}{T^2}\\\frac{a}{b} = \frac{L}{T}*\frac{T^2}{L} \\\frac{a}{b} =\frac{T^2}{T}\\\frac{a}{b} =T\)

Hence the dimension of a/b is T

we can use 3 formula for inclined plane

W=-ΔPE

W=ΔKE

W=mg sinθ. d

let's use the third formula

sinθ = 1.2 : 3

sinθ = = 0.4

W = m.g. sinθ. d

W = 110 x 10 x 0.4 x 3

W = 1320 J

The final equilibrium temperature (in °C) of the system when ice and water vapor are combined can be calculated using the principle of energy conservation and the specific heat capacities of ice and water.

To determine the final temperature, we can apply the equation:

(m₁ * c₁ * ΔT₁) + (m₂ * c₂ * ΔT₂) = 0

Where:

- m₁ is the mass of ice (22.0 kg)

- c₁ is the specific heat capacity of ice (2.09 J/g·°C)

- ΔT₁ is the change in temperature of ice (final temperature - 0.00 °C)

- m₂ is the mass of water vapor (4.80 kg)

- c₂ is the specific heat capacity of water (4.18 J/g·°C)

- ΔT₂ is the change in temperature of water (final temperature - 100.0 °C)

Solving for the final temperature, we find:

(22.0 kg * 2.09 J/g·°C * ΔT₁) + (4.80 kg * 4.18 J/g·°C * ΔT₂) = 0

Substituting the given values, we can solve for ΔT₁ and ΔT₂. Once we have those values, we can find the final temperature by adding ΔT₁ to 0.00 °C.

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