What is the frequency of a wave that has a speed of 0.5 m/s and a wavelength of 0.050 meter?
0.5 hertz.
0.008 hertz
20 hertz
10 hertz.​

Answer:

Kilo > Hecto > base unit > milli

Feel free to mark this as brainliest! :D

Answer:

c = λ ν      (wavelength * frequency)

ν = 3.00E8 / 400E-9 = 1.20E15 / sec

E = h ν = 6.62E-34 J-s* 1.20E15 / s = 7.94E-19 J

Note: 1 electron volt = 1 * 1.60E-19 = 1.60E-19 J

The most sustainable way to drive a car would be to use an all-electric car using electricity from a windmill or solar photocells.

An all-electric car powered by electricity from renewable sources such as windmills or solar photocells offers the most sustainable solution for driving. Wind and solar power are considered clean and renewable energy sources, as they do not produce greenhouse gas emissions during operation. By utilizing these energy sources to generate electricity, the environmental impact of transportation can be significantly reduced.

Compared to other options mentioned, such as a hydrogen fuel cell car or a hybrid electric car, an all-electric car powered by renewable energy has several advantages. Hydrogen fuel cells require hydrogen production, which is currently primarily derived from fossil fuels. On the other hand, hybrid electric cars still rely partially on fossil fuels for generating electricity.

By choosing an all-electric car powered by renewable energy, we can minimize carbon emissions, reduce dependence on finite fossil fuel resources, and contribute to a cleaner and more sustainable future for transportation.

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The formula for gravitational force between two objects is given as the product of gravitational constant and masses of the two objects, divided by the square of distance between the two objects.

The formula is given as:

= F = (G X M X m) / r²

where,

Force = F

Gravitational Constant = G

Mass of one object = M

Mass of another object = m

Distance = r

According to Newton's universal law of gravitation, The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them.

The force of attraction on a body by earth is called gravitational force. Example : The leaves and fruits fall from a tree downwards towards the ground.

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New observations support Hypothesis 1, as interactions between like and unlike charges follow expected attractive and repulsive behaviors.

Based on the observed interactions between like and unlike charged objects, it appears that the new observations do indeed add support to Hypothesis 1.

When like charges (similarly charged objects) come into proximity with one another, they exhibit repulsive behavior, causing them to move away from each other.

Conversely, when unlike charges (oppositely charged objects) come into contact, they display attractive behavior and move towards one another.

These observed phenomena align with our understanding of the behavior of charged objects and reinforce the validity of Hypothesis 1.

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Answer: Lisa Leslie

Explanation: On July 30, 2002, Leslie became the first woman to dunk the ball in a WNBA game.

Answer:

Lisa Leslie

Explanation:

On July 30, 2002, Leslie became the first woman to dunk the ball in a WNBA game

Jim Crow laws was the legal measure which allowed whites in southern states to keep blacks from voting after reconstruction ended.

These were the state and local laws which enforced racial segregation in the Southern part of the United States.

Due to this laws, whites in southern states kept blacks from voting after reconstruction ended.

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Answer:

B

Explanation:

A P E X

Kepler's third law states that the square of the period of a planet's orbit around the sun is proportional to the cube of its average distance from the sun.

Kepler's third law, also known as the law of harmonies, is a mathematical relationship that describes the motion of planets around the sun. It states that the ratio of the cube of a planet's average distance from the sun to the square of its orbital period is constant for all planets in the solar system.

Mathematically, this can be expressed as T^2 = k*R^3, where T is the orbital period of the planet, R is its average distance from the sun, and k is a constant of proportionality. Kepler's third law is an important tool for astronomers to study and understand the dynamics of the solar system.

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Please find attached photograph for your answer.

Hope it helps.

Do comment if you have any query.

Answer:

Whats The Question Exactly (Ill Edit This To Fit It)

Explanation:

Answer:

First you take a hula hoop and hold it around your waist then you start moving your hips in a circle and let the hula  hoop go off your hands and you keep moving your hips. You keep moving your hips until you want to stop but it might fall. Just keep trying and you should get the hang of it in a few minutes.

Explanation:

Answer:

She won't have any kenetic energy at the bottom of the hill

Explanation:

The reason there are two slits, rather than one, in a Young’s experiment is to create a path length difference. The correct option is C.

Young’s experiment involves a double-slit setup where light from a single source is split into two beams by a barrier that contains two narrow slits. The light from each of the two slits acts as a coherent source, producing a pattern of interference fringes on a screen placed behind the barrier.

The reason for using two slits rather than one is to create a path length difference between the two beams. This path length difference causes the waves to interfere with each other constructively or destructively, leading to a pattern of bright and dark fringes on the screen.

The pattern of fringes is a result of the interference of the waves from the two slits and provides valuable information about the wave nature of light. Therefore, the two slits are an essential component of Young's experiment, and they create a path length difference that leads to interference fringes. The correct option is C.

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Answer:

Sound waves are the longitudinal waves which are made of compression and rarefaction. So the compression is the region where the molecules compress so the ANSWER should be rarefaction region as the molecules spread out or expand.

The cylinder reaches the bottom of the ramp first due to kinetic energy.

The conservation of energy is used to evaluate the translational velocity of the hoop as it falls down through the ramp, the potential energy is converted to the kinetic energy caused by the rolling as well as the kinetic energy due to translational motion.

Kinetic energy is the power a thing has as a result of motion.

Applying a force is necessary if we want to accelerate an object. We must exert effort in order to apply a force. Once the job is finished, energy is transferred to the item, which then moves at a new, constant speed. Kinetic energy is what is conveyed, and it is dependent on the mass and speed attained.

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Answer:

90 mAmps

Explanation:

V=IR

V/R = I

9 v / 100 ohm = .09 amps = 90 mAmps

Given,

The mass of the board, m=5 kg

The reading on the weighing board near the feet of Annabelle, F₁=380 N

The reading of the weighing board near the head of Annabelle, F₂=280 N

The total distance between the two weighing boards, d=2.50 m

Let us assume that the centre of mass of the board lies exactly at its geometrical centre. Thus the distance of the centre of mass of the board from either of the weighing boards is l=2.50/2=1.25 m

a)

As the system is in equilibrium, the total downward gravitational force is equal to the upward reaction force applied by the boards. Thus,

Where M is the mass of Annabelle and g is the acceleration due to gravity.

On substituting the known values,

Thus Annabelle's mass is 62.35 kg

b)

The entire system is also in rotational equilibrium and net torque is zero.

Let us assume that the weighing board near Annabelle's feet is the pivot point of the system.

Therefore,

Where d_c is the distance of the centre of mass of Annabelle from her feet.

On rearranging the above equation,

On substituting the known values,

Thus the centre of mass of Annabelle is 1.05 m from her feet.

Answer:

Machines can reduce force but not work.

Work = force * distance

If a machine reduces the force input by a factor of two, say, then the distance traveled by the applied force must be doubled

One cannot get more work out of a machine than the work input to the machine.

The density of lead is 11.4 g/cm3 at 25°C and the volume occupied by 25.0 g of lead is 2.19 cm3. Hence, option A is the correct option.

The formula to calculate the volume (V) of a substance is:

V = m / ρ

Here, m is the mass of the substance and ρ is its density so in this case, we have:

m = 25.0 g

ρ = 11.4 g/cm3

Putting these values into the formula:

V = 25.0 g / 11.4 g/cm3

V = 2.19 cm3

Therefore, the volume occupied by 25.0 g of lead is 2.19 cm3.

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Answer:

an educated guess about the solution to the problem.

Explanation:

the hypothesis is is a specific, testable PREDICTION about what you expect to happen in your study.

The angular velocity of a point on the surface of the earth is \(7.3 * 10^{-5} rad/s\)

What is angular velocity?

Angular velocity is a vector quantity and is described as the rate of change of angular displacement which specifies the angular speed or rotational speed of an object and the axis about which the object is rotating.

What is angular velocity and write its formula?

Angular velocity is the rate of change of the position angle of an object with respect to time, so w = theta / t, where w = angular velocity, theta = position angle, and t = time.

Every point on the earth's surface completes one circular orbit (centered at a point on the axis) in 1 day

1 day = 24x60x60

1 day=86400s

Angular velocity is given by :

\(w =2\pi /86400\\ w =7.3*10^{-5} rad/s\)

Thus, \(7.3 * 10^{-5} rad/s\) is the correct answer.

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Answer:

KE = 1/2 M V^2

V = (2 KE / M)^1/2 = (2 * 40 / .1)^1/2 = 28.3 m/s

Answer:

शब्द प्रयोग गर्छौं ।

The difference, though, lies in the hydrogen atoms. In heavy water, each hydrogen atom is indeed heavier, with a neutron as well as a proton in its nucleus. This isotope of hydrogen is called deuterium, and heavy water's more scientific name is deuterium oxide.

The combined new velocity of the coal wagon and the locomotive is 3.04 m/s.

Velocity is the rate of change of displacement.

To calculate the combined velocity of the coal wagon and the locomtive, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the combined new velocity is 3.04 m/s.

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Answer:

amplitude

Explanation:

amplitude of a wave is the maximum displacement of a point from its rest position.

hope you get it,

A tug-of-war that results in one team pulling the other across the line is an example of reaction force.

A reaction force  can be described as the consequence of an action force which is opposite in direction.

It should be noted that the  Newton's third law of motion is the one that deals with these two forces, which  can be considered as the action and reaction forces however the Newton's third law made us to understand that for every action, there is an equal and opposite reaction, hence the case above can be seen as an example of reaction force.

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The natural frequencies are ω1 = √(2k/m) and ω2 = √(k/(2m)). If the off-diagonal terms are zero, the equations of motion are fully decoupled. These responses can be plotted to visualize the system's behavior over time.

a. For ci = C2 = 0:

i. The natural frequencies of the system can be computed using the formula: ωn = √(ki/mi), where ωn is the natural frequency, ki is the stiffness coefficient, and mi is the mass. In this case, we have m1 = m, m2 = 2m, k1 = 2k, and k2 = k. Therefore, the natural frequencies are ω1 = √(2k/m) and ω2 = √(k/(2m)).

ii. To orthonormalize the modes, we need to find the eigenvectors associated with the system's mass and stiffness matrices. By performing modal analysis, we can compute the eigenvectors and normalize them to obtain orthonormal modes. Once the modes are orthonormalized, we can check if a modal transformation of coordinates fully decouples the equations of motion by examining the off-diagonal terms of the transformed mass and stiffness matrices. If the off-diagonal terms are zero, the equations of motion are fully decoupled.

iii. To calculate the system responses xi(t) and x2(t) using modal analysis for m = 1 and k = 4, we can express the initial conditions in terms of the orthonormal modes obtained in part ii. Then, using the modal transformation, we can decouple the equations of motion and solve them individually for each mode. Finally, the system responses can be obtained by combining the modal contributions based on the computed modal coordinates and natural frequencies. These responses can be plotted to visualize the system's behavior over time.

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The current flowing through each wire is the experiment's independent variable because it is the one that the experimenter is actively manipulating and controlling.

The resistance is influenced by the wire's thickness, so the thicker the wire, the lower the resistance. Because less water can flow through a narrower pipe in a given length, there is more resistance in a narrower pipe.

Due to the alloy composition of nichrome wire, its resistance is quite high. Because of this, it generates a lot of heat when current flows through it, making it extremely hot to the touch.

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