What is the mass of the block of iron that has a density of 7.87 g/cm3. Its volume measurements are 2 cm x 10 cm x 5 cm.

Each compound name with chemical formula:

Silicon tetrafluoride - SiF₄

Potassium sulfite - K₂SO₃

Diphosphorous trisulfide - P₂S₃

Siver(II) fluoride - AgF₂

Magnesium perchlorate - Mg(ClO₄)₂

A compound's constituent elements and their relative proportions are listed in a chemical formula. No subscript is used when there is only one atom of a particular type. A subscript is added to the symbol for the atom when there are two or more of a particular type of atom present.

A chemical formula lists the constituent elements of a compound along with how many atoms of each are present in the compound's smallest unit, whether it be a molecule or a formula unit. We can name simple compounds given their chemical formulas by using the names of the elements and a few simple rules.

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Answer:

140 degrees cel

Explanation:

Cold objects are more dense due to the settleing of atoms, when taken advantage of, containers can hold more. but when heated, atoms vibrate alot. due to this they jitter around and take up more space.

Explanation:

Plastics with a density less than or equal to 1.025 g/mL will float in seawater, while plastics with a density greater than 1.025 g/mL will sink.

Here are some examples of plastic densities:

Polyethylene terephthalate (PET) has a density of approximately 1.38 g/mL, so it will sink in seawater.

Polypropylene (PP) has a density of approximately 0.9 g/mL, so it will float in seawater.

High-density polyethylene (HDPE) has a density of approximately 0.95 g/mL, so it will float in seawater.

Polystyrene (PS) has a density of approximately 1.05 g/mL, so it will sink in seawater.

Based on the above examples, we can see that plastics such as polypropylene and high-density polyethylene will definitely float in seawater, while others such as polyethylene terephthalate and polystyrene will definitely sink. Other types of plastics with densities close to 1.025 g/mL may float or sink depending on their exact density and the conditions of the water, such as temperature and salinity.

Answer:

Take a look below

Explanation:

The size of the habitable zone around a star of spectral class g is larger to the size of the habitable zone around a spectral class m star.

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Answer:

when you learn to lift weights with the proper body mechanics good form becomes a habit It's true

given the linear velocity of the ball relative to the elbow joint and the moment of inertia of the forearm, we calculated the angular velocity using the formula relating linear velocity to angular velocity. Then, using the formula for rotational kinetic energy, we found the rotational kinetic energy of the forearm to be approximately 527.55 J.

To calculate the rotational kinetic energy of the forearm, we need to use the formula:

Rotational Kinetic Energy (K_rot) = (1/2) * moment of inertia * angular velocity^2

First, let's find the angular velocity. We know that the linear velocity of the ball relative to the elbow joint is 22.5 m/s at a distance of 0.490 m from the joint. The linear velocity of a point on the forearm is related to its angular velocity by the formula:

Linear Velocity = Radius * Angular Velocity

Since the distance from the joint to the point is the radius, we can rearrange the formula to find the angular velocity:

Angular Velocity = Linear Velocity / Radius

Plugging in the values, we get:

Angular Velocity = 22.5 m/s / 0.490 m

Now, let's calculate the rotational kinetic energy using the formula mentioned earlier:

K_rot = (1/2) * moment of inertia * angular velocity^2

Plugging in the values, we get:

K_rot = (1/2) * 0.500 kg·m^2 * (Angular Velocity)^2

Substituting the value of Angular Velocity, we get:

K_rot = (1/2) * 0.500 kg·m^2 * (22.5 m/s / 0.490 m)^2

Simplifying the expression, we have:

K_rot = (1/2) * 0.500 kg·m^2 * (45.92)^2

Calculating the square of 45.92, we get:

K_rot = (1/2) * 0.500 kg·m^2 * 2110.2064

Finally, multiplying the values together, we find:

K_rot = 0.500 kg·m^2 * 1055.1032

The rotational kinetic energy of the forearm is approximately 527.55 J.
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Answer:

\(20\; {\rm m\cdot s^{-1}}\), assuming that friction is negligible.

Explanation:

If an object of mass \(m\) moves at a velocity of \(v\), the momentum \(p\) of this object would be \(p = m\, v\).

if friction is negligible, the sum of the momentum should be the same before and after the collision.

Before the collision:

In other words, the sum of momentum was \(40\; {\rm kg\cdot m\cdot s^{-1}}\) before the collision.

After the collision:

The sum of the momentum stays unchanged at \(40\; {\rm kg\cdot m\cdot s^{-1}}\). Subtract the momentum of the ice skater from the sum to find the momentum of the snowman:

\(40\; {\rm kg\cdot m\cdot s^{-1}} - 0\; {\rm kg\cdot m\cdot s^{-1}} = 40\; {\rm kg\cdot m\cdot s^{-1}}\).

Divide the momentum of the snowman by its mass to find its velocity:

\(\begin{aligned}\frac{40\; {\rm kg\cdot m\cdot s^{-1}}}{2\; {\rm kg}} = 20\; {\rm m\cdot s^{-1}}\end{aligned}\).

In other words, the collision of the snowman would be \(20\; {\rm m\cdot s^{-1}}\) after the collision.

Answer:

80 meters

Explanation:

Answer:

So the distance covered is 80meters

Explanation:

Speed=72km/h=20m/s

Time=4seconds

Distance covered=?

As we know that

Speed=distance covered/time taken

Speed*time taken=distance covered

Putting values

Distance covered=20m/s*4s

Distance covered =80meters

I hope it will help you

The principle involved is the conservation of momentum, where the boat moves in the opposite direction to maintain total momentum zero.

The physics principle involved in the movement of the boat as the man jumps onto the jetty is the principle of conservation of momentum. According to this principle, the total momentum of an isolated system remains constant if no external forces act on it.

In this scenario, the boat and the man can be considered as an isolated system since there are no external forces acting on them. Initially, when the man is standing on the boat, the system is at rest, and the total momentum is zero.

When the man jumps off the boat and onto the jetty, he exerts a force on the boat in one direction. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. As the man pushes off the boat, the boat experiences an equal and opposite force that propels it in the opposite direction.

Due to the conservation of momentum, the momentum gained by the boat in one direction is equal to the momentum lost by the man in the opposite direction. As a result, the boat moves away from the jetty, exhibiting a backward motion.

This principle can be mathematically expressed as:

Initial momentum of the system = Final momentum of the system

Since the initial momentum is zero, the final momentum of the system (including the man and the boat) must also be zero. The momentum gained by the boat ensures that the total momentum of the system remains conserved.

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Answer:

is

Explanation:

e

The distance between Mankato and Duluth is 237 miles i.e.  equal to 381.415 kilometer approximately.

Distance can be define as, the total movement of an object without any regard to direction. Thus in very simple word the distance between two points is the length of the line segment that connects them. The distance between two points is always positive.

A line segment is a term of geometry that, the part of a line having two endpoints

The distance between Mankato and Duluth = 237 miles

1 miles = 1.60934 kilometers

237 miles = 237 × 1.60934 kilometers

237 miles = 381.41358 kilometers

Therefore ,we can write the distance between Mankato and Duluth in kilometers is 381.4 kilometers.

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With less ice, it could greatly affect the animals that depend on the ice, such as polar bears, walruses, and many other animals. This could result in their species eventually going extinct.

Answer:it’s 400 meters

Explanation:

Answer:

my big long peen for ur mom

Explanation:

Answer:

A biotic factor is a living thing and has an impact on the environment whilst Abiotic factor is not a living thing but has an impact on the environment

Answer:

29.7 m/s fast, velocity is 29.7 m/s

Explanation:

Applying,

v² = u²+2gs...................... Equation 1

Where v = final velocity, u = initial velocity, g = acceleration due to gravity, s = distance.

Given: u = 0 m/s (dropped from height), s = 45 m

Constant: g = 9.8 m/s²

Substitute these values into equation 1

v² = 0²+2×9.8×45

v² = 882

v = √(882)

v = 29.7 m/s.

Hence the stone will be moving 29.7 m/s fast and the velocity is also 29.7 m/s

The angular wave number of a wave with a speed of 5 m/s and a frequency of 10 Hz is equal to ω = 2πf/v = 2π (10 Hz) / (5 m/s) = 6.283185 rad/s.

The angular wave number is an important parameter in describing the characteristics of a wave. It is a measure of the number of wave cycles that occur in a given distance, and it is related to the wavelength, frequency, and speed of the wave.

The angular wave number can also be used to calculate the frequency of a wave from its wavelength and speed. This is done by using the equation f = v/2πλ, where f is the frequency, v is the speed of the wave, and λ is the wavelength.

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Answer:

\(n = 1.563x {10}^{20} \)

The purpose of this experiment is to understand series and parallel circuits, how to calculate their equivalent resistance, and how to construct the laboratory.

There are two or more paths that current to travel through in a parallel circuit. Each element of the parallel circuit has the same voltage applied to that too. The total current flowing from the source is equal to the sum of a currents through each path.

When one route is blocked, electricity continues to flow thanks to a parallel circuit. Numerous lighting fixtures are a great example. Even if just one light in the fixture fails, led light stays on.

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Answer:

efficiency is equal to work output over work input times 100 ÷ so the answer for this question is 54.7 percent

There is no cure for any of those. However you can contain the symptoms with medications

Answer:

All of them except diabetes

Explanation:

Answer:

Eruption plume, a column of hot volcanic ash and gas emitted into the atmosphere during an explosive volcanic eruption. Mantle plume, an upwelling of abnormally hot rock within the Earth's mantle, which can cause volcanic hotspots.

Explanation:

teehee love your pfp

Answer:

in this case destruction is obvious also there might be some reaction take place

Explanation:

The SI was established in 1960 by the 11th General Conference on Weights and Measures (CGPM, Conférence Générale des Poids et Mesures). The CGPM is the international authority that ensures wide dissemination of the SI and modifies the SI as necessary to reflect the latest advances in science and technology.

The weight will be 80N.

Given :- Weak Gravitational field of moon relative to earth ,

F=1.6N

To find : Weight of a 50Kg mass on Moon .

Principle - Weight and mass although sounding same has different roles in Physics . Mass is the amount of matter that is utilized to build a material while talking about weight means its inclusive of an exertion of earth with the application of mass. Mathematically weight w= mg [Product of mass and gravity ]

Now in this question using basic unitary method we can resolve the ask of question. For example cost of one pen is 2rupee then cost of 2 pens is 4 rupees.

Reasoning- As per question , weight of 1 kg = 1.6N

so weight of 50Kg= 1.6 x 50⇒80N

Hence the amount of 80N equivalent weight is computed.

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Answer: D. 3.37m/s

Explanation:Just qnswerd iit