To calculate the wavelength of a wave, take the wave speed and divide by the frequency of the wave. true or false

The find the final speed of the 2.0-kilogram body is 65 m/s towards east.

To find the final speed of a 2.0-kilogram body initially traveling at 40 meters per second east, we will use the following physics concepts:

Newton's Second Law of Motion: F = ma, where F is the force, m is the mass, and a is the acceleration.

Kinematic Equation: vf = vi + at, where vf is the final velocity, vi is the initial velocity, a is the acceleration, and t is the time.

Step 1: Calculate the acceleration.

Using F = ma, we can solve for a:

F = 10 N

m = 2.0 kg

So, a = F/m = 10 N / 2.0 kg = 5 m/s²

Step 2: Calculate the final velocity using the kinematic equation.

Initial velocity, v_i = 40 m/s

Acceleration, a = 5 m/s²

Time, t = 5 s

So, vf = vi + at

[tex]v_f = 40 \, \text{m/s} + (5 \, \text{m/s}^2 \times 5 \, \text{s}) = 40 \, \text{m/s} + 25 \, \text{m/s} = 65 \, \text{m/s}[/tex]

Therefore, the final speed of the body is 65 meters per second east.

Explanation:

Physical change is a change in which there is no change in chemical composition of the substance.

For example, when we freeze liquid water then it changes into solid, that is, only physical state of water has changed and no change in chemical composition.

Therefore, in a physical change there is change only in the arrangement, energy and movement of particles.

Answer:

Speed

Explanation:

The information "100 miles per hour" describes that the train travels 100 miles of distance in a time period of 1 hour. we know that the speed is defined as the distance traveled by an object in unit interval of time with no information about the direction of motion. hence the information "100 miles per hour" about the express train describes the speed of the train.

Answer:

The answer is False

Explanation:

Pressure is understood as a force exerted by a gas, a liquid or a solid on a surface. An increase in pressure tends to favor volume contraction. For example, the lower the pressure exerted on the surface of a liquid, the easier it is to vaporize, because the molecules of the liquid find less resistance to leave it and transform into steam.

Answer:

If the velocity of a car is halved, the centripetal force required to keep it in path of constant radius becomes one fourth of the initial force.

Explanation:

The centripetal force is required to move an object in circular path. Mathematically, the formula of the centripetal force is given by :

[tex]F=\dfrac{mv^2}{r}[/tex]

Here,

m is the mass of the object

v is the velocity of object

r is the radius of the circular path

If the velocity of the car is halved, v'=v/2

New centripetal force is given by :

[tex]F'=\dfrac{mv'^2}{r}[/tex]

[tex]F'=\dfrac{1}{4}\times \dfrac{mv^2}{r}\\\\F'=\dfrac{1}{4}\times F[/tex]

New centripetal force becomes one fourth of the initial force, when the velocity of a car is halved.

Final answer:

When the velocity of a car is halved, the centripetal force required to keep it in a path of constant radius is divided by four.

Explanation:

When the velocity of a car is halved, the centripetal force required to keep it in a path of constant radius is divided by four. This is because the centripetal force is directly proportional to the square of the velocity and inversely proportional to the radius of the circular path.

For example, let's say the original velocity of the car is v and the centripetal force required is F. When the velocity is halved to v/2, the centripetal force becomes (v/2)² = F/4.

Therefore, the centripetal force required to keep a car in a path of constant radius is divided by four when the velocity is halved.

speed

i took the test just know and put velocity and it was wrong. it said the answer was speed

Given distance and a period, we can calculate speed, angular velocity, frequency, and even time dilation effects. Speed is calculated using the formula v = d/t.

If you are given distance and a period, you can calculate several interesting physics concepts. One fundamental calculation would be speed or velocity since speed equals distance divided by time (v = d/t). If the movement occurs at a constant speed, this is straightforward. However, suppose the speed varies or involves a pendulum or circular motion. In that case, you can dive into more specific calculations such as angular velocity, frequency, and time dilation effects in relativity for movements approaching the speed of light.

For example, the period T of an object moving back and forth with a constant speed v over a distance 2L, such as a pendulum, can be calculated using T = 2L/v. Similarly, the frequency, f, of such an oscillating system is found using f = 1/T. These concepts apply to various systems, including satellites orbiting a planet where the period is related to the orbital distance from the center of the celestial body.

Answer:

Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects.

Explanation:

Gravity is defined as the force of attraction between two objects. It depends on the masses of objects and the distance between them. The gravitational force between two bodies is given by the universal law of gravitation. According to this law, the force of gravity is :

[tex]F=G\dfrac{m_1m_2}{d^2}[/tex]

Where

G is the universal gravitational constant

m₁ and m₂ are masses of two bodies

d is the distance between two bodies

Hence, the correct statement that describes gravity is (b)

Answer:

The answer is Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects.

Explanation:

Gravity is a natural phenomenon by which objects with mass are attracted to each other, mostly observable in the interaction between planets, galaxies and other objects in the universe. It is one of the four fundamental interactions that causes the acceleration experienced by a physical body in the vicinity of an astronomical object. It is also called gravitational interaction or gravitation.

Answer:

C .Nebula

Explanation:

Protostar is an early stage in the formation of a star. Main sequence star is formed after the protostar heats up to almost 10 million kelvin temperature.

The interstellar medium fills the entire space, which appears to be seemingly empty. It is comprised of gas and dust. Hydrogen is the most abundant element in this medium, which is spread across and fills the space.

Under the influence of gravity, pressure and temperature, these clouds of gas and dust come together forming nebula. Hydrogen and helium in this nebula, under high temperature  conditions form protostars.

The Gay-Lussac law can clarify this, which states that if the temperature rises in the summer, the pressure should rise as well in order for K to remain constant.

Gay-law Lussac's is most commonly associated with Joseph-Louis Gay-law Lussac's of combining volumes of gases, which was discovered in 1808 and published in 1809.

It can also refer to the proportionality of a gas's volume to its absolute temperature at constant pressure.

The law is named after the French chemist who discovered the relationship between a gas's pressure and absolute temperature. Joseph gay lussac was his name.

The Gay-Lussac law, which states that if the temperature rises in the summer, the pressure must rise as well in order for K to remain constant, can help to clarify this.

Thus, the Gay-Lussac law can explain her observation.

For more details regarding Gay-Lussac law, visit:

https://brainly.com/question/11387781

#SPJ2

Answer:

52.2%

Explanation:

Efficiency= output temperature/ input temperature

output temperature= input temperature-exhaust temperature

so, 653 K - 312 K = 341 K

341 K / 653 K = 52.2%

I got the answer correct on the online quiz.

The claim that lava blown out of a volcano is called pumice is False; pumice is a volcanic rock formed from cooling lava with trapped gas, not the lava itself.

The statement that lava blown out of a volcano in an explosive eruption is called pumice is False. Pumice is not lava itself, but rather a type of volcanic rock that forms when frothy lava cools and solidifies with a high volume of gas bubbles trapped inside. Pumice is a vesicular felsic igneous extrusive rock that is light enough to float on water due to its numerous gas bubble cavities giving it a very low density.

Pumice is characterized by a frothy texture and typically takes on a whitish, light grayish, or very light brown color. Most notably, pumice has a high porosity because of the many gas bubbles that were present in the originating lava. While pumice results from volcanic eruptions, it is the solid portion that forms from rapidly cooling lava with trapped gas bubbles, distinguishing it from molten lava ejected during an eruption.

In the context of volcanic fragmental rocks such as tuff, pumice fragments can be found within a light-colored volcanic ash. These rocks are formed by explosive volcanic eruptions that blast solid fragments and ash into the atmosphere.

Answer:

c. They both have a high energy output.

Explanation:

- Nuclear fusion is the process in which two lighter nuclei combine together into a heavier nucleus

- Nuclear fission is the process in which a heavier nucleus breaks apart into smaller nuclei

In both cases, a huge amount of energy is released. In fact:

- In the nuclear fusion, the mass of the heavier nucleus is slightly lower than the sum of the masses of the two initial nuclei: this means that part of the initial mass has been converted into energy, according to the equation

[tex]E=mc^2[/tex]

and we can see that even for small amount of mass, m, the energy released is huge

- In the nuclear fission, the mass of the final products is less than the mass of the initial heavier nucleus, so again, part of the initial mass has been converted into energy, according to the equation

[tex]E=mc^2[/tex]

a.  They both require a high energy input.  No.  Fission doesn't require ANY energy input to get going.  

b.  They both occur without byproducts.   No.  The by-products of fission are the biggest real problem in commercial nuclear power . . . where to put the bad stuff that's left over.

c.  They both have a high energy output.  Yes !

d.  They both involve large atoms breaking into smaller atoms.  No.  'Fission' involves large nucleii breaking into smaller ones.  'Fusion' is exactly the opposite ... combining small nucleii into more complex ones.

The system gains energy and the sign of w is positive if work is done on it. According to the principle of energy conservation, every change in the system's energy must take into account both the energy it has received and lost. Thus, option B is correct.

An interaction with its environment causes a system's internal energy to decrease. The internal energy of a system grows when work is done on it.

The energy change from work always takes place as part of a process, much like the energy change from heat: a system can perform work, but it doesn't contain work.

Therefore, when the system makes an impact on the environment, we characterize work as being positive (energy leaves the system). The work is negative if it is done to the system (energy added to the system).

Learn more about internal energy here:

https://brainly.com/question/11278589

#SPJ2

Answer:

B, h=9

Explanation:

Answer A. Red shift. verified 12/21/18 per test results.

sewage is the answer because it's what the water was filled with most

The cheetah will run a distance of 360 meters in 12 seconds if it maintains a constant speed of 30 m/s.

To determine how far a cheetah will run in 12 seconds at a speed of 30 m/s, we use the formula for distance traveled at a constant speed, which is [tex]distance = speed \times time[/tex]. Here, the speed is 30 m/s, and the time is 12 seconds, so the distance the cheetah runs is:

[tex]Distance = 30\ m/s \times 12\ s = 360\ meters.[/tex]

Therefore, the cheetah will run a distance of 360 meters in 12 seconds if it maintains a constant speed of 30 m/s throughout that time.

Answer:

In a galaxy, the expansion of the universe actually does not have any effect, because the force of gravity is enough to kinda keep the celestial bodies in their orbits.

Now, the expansion can be seen between galaxies (according to the Hubble's law, the far away is the galaxy, the faster it seems to move away), so the forces between stars actually will not really change, and the forces that the stars are experiencing by bodies in other galaxies are almost depreciable, so nothing will happen.

Final answer:

Option E) Sea Water is a poor electrical insulator among the given options, which include Plastic, Glass, Wood, and Sea Water, because the free ions in sea water enable it to conduct electricity well.

Explanation:

The question asks which of the given options is a poor electrical insulator. A poor electrical insulator would be a good conductor of electricity. Out of the options provided (Plastic, Glass, Wood, and Sea Water), option E) Sea Water is a poor insulator because it contains a high concentration of free ions, making it a good conductor of electricity. This is in stark contrast to materials like plastic, glass, and wood, which are known to be good insulators because they do not allow charges to move through them easily.

Materials like Styrofoam, fiberglass, and goose-down feathers are also mentioned as examples of good insulators, as they contain small pockets of air which is a poor conductor of heat. However, for electrical insulation, air's thermal properties are less relevant than its ability to prevent electric charge movement. When discussing electrical insulators, it's important to note that the presence of free ions, as found in Sea Water, can lead to better conductivity of electricity, making it a poor electrical insulator.

Answer:

B. Greater energy

Explanation:

Fast moving water is very energetic as its can displace very large rocks, boulders and make pebbles and sand out of them through the process r erosion. Fast moving water have kinetic energy, it opposes anything that come in its way. As river make its own channel by eroding plane. Many antecedent rivers have make their channel by cutting large mountains too.

The normal force exerted by the table on a 4kg book, when a hamster pushes down on the book with an additional force of 3N, is 42.2N.

When a 4kg book sits on a table, it is subject to Earth's gravity which pulls it down. This force, due to gravity, is given by the mass of the book multiplied by the acceleration due to gravity (Fg = mass × gravity), which is 4 kg × 9.8 m/s² = 39.2 N.

This downward force is balanced by an upward normal force (N) exerted by the table.

When a hamster pushes down on the book with an additional force of 3 N, the total downward force becomes Fg + 3 N.

Since the book is stationary on the table, the combined downwards forces must be balanced by the normal force exerted by the table.

Therefore, the normal force is equal to the weight of the book plus the force exerted by the hamster. So, N = 39.2 N + 3 N = 42.2 N. This is the normal force exerted by the table on the book.

The normal force exerted by the table on a 4kg book, which a hamster is pushing down on with a force of 3N, is 42.2 N, as it must balance the combined weight of the book and the force applied by the hamster.

Calculating the Normal Force

When considering the scenario of a 4kg book resting on a table with a hamster pushing down on it, we must take into account the forces acting on the book. The weight of the book due to gravity is given by W = mg, where m is the mass of the book and g is the acceleration due to gravity (9.80 m/[tex]s^2[/tex]).

Therefore, the weight of the book is W = 4 kg imes 9.80 m/[tex]s^2[/tex] = 39.2 N. The hamster exerts a downward force of 3 N, which adds to the weight of the book. The total downward force on the book is thus 39.2 N + 3 N = 42.2 N.

According to Newton's third law, the normal force exerted by the table on the book must balance this total downward force in the absence of vertical acceleration. Therefore, the normal force that the table exerts on the book is also 42.2 N.

Answer: A 0.5kg

Explanation:

Momentum is defined as the product of mass and velocity of a body.

Momentum = mass × velocity

Mass = ?

Momentum = 7.5kgm/s

Velocity = 15m/s

Mass = Momentum/Velocity

Mass = 7.5/15

Mass = 0.5kg

The elastic constant of the wire is about 470 N/m

[tex]\texttt{ }[/tex]

Let's recall Elastic Constant formula as follows:

[tex]\boxed{k = \frac{E A}{L}}[/tex]

where:

k = elastic constant ( N/m )

E = Young's Modulus ( Pa )

A = cross-sectional area ( m² )

L = initial length ( m )

Let us now tackle the problem!

[tex]\texttt{ }[/tex]

Translation:

A wire, with cross sectional area A = 5 mm² and length L = 32 cm, is stretched by a force. Assuming that Young's modulus of wire E = 3 × 10⁷ N/m², calculate the elastic constant k of the wire !

Given:

cross sectional area = A = 5 mm² = 5 × 10⁻⁶ m²

length of wire = L = 32 cm = 0.32 m

Young's modulus of wire = E = 3 × 10⁷ N/m²

Asked:

elastic constant of wire = k = ?

Solution:

[tex]k = \frac{E A}{L}[/tex]

[tex]k = \frac{ (3 \times 10^7) \times (5 \times 10^{-6})}{0.32}[/tex]

[tex]k = 468.75 \texttt{ N/m}[/tex]

[tex]k \approx 470 \texttt{ N/m}[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{ }[/tex]

Grade: High School

Subject: Physics

Chapter: Elasticity

To calculate the total atmospheric force on the top of a table, the table's surface area is multiplied by the atmospheric pressure (F = PxA). The total force upward on the underside of the table under normal circumstances is equal to the downward atmospheric force.

The subject of this question is physics focusing specifically on the concept of air pressure and force. To determine the total force of the atmosphere acting on the table, we first need to know that the atmospheric pressure is about 101325 N/m2. The force F is calculated by multiplying the pressure P with the area A (F = P x A). Hence, the area of the table is 1.5 m x 2.2 m = 3.3 m2. Therefore, the total force is F = 101325 N/m2 x 3.3 m2 = 334472.5 N, which is the answer to part (a).

For part (b) of the question, under normal circumstances, the total force acting upward on the underside of the table is the same as the downward atmospheric force, that is, 334472.5 N. This equal upward force is what keeps objects from being crushed by the atmospheric pressure.

https://brainly.com/question/13490641

#SPJ11