tsunami a tsunami traveling across deep water can have a speed of 750 km/h and a wavelength of 420 km. What is the frequency of such a wave?

Answer:

544

Explanation:

The total work done by Happy Hogan is 0 joules because the package is being carried at a constant velocity and there is no change in kinetic energy. This is because work done is the product of force and displacement of an object in the direction of the force.

Hence, if there is no force applied or the object is not displaced in the direction of force then no work is done. The formula for work done is given as follows:

Work done = Force × displacement × cosθHere, cosθ = 1 because the force is applied in the direction of displacement. But in this case, there is no force applied to the package. Happy Hogan is just carrying the package at a constant velocity, hence, there is no change in the kinetic energy of the package.

Therefore, the total work done by Happy Hogan while carrying the package at a constant velocity across the room for 12 seconds is zero joules.

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The root-mean-square speed (rms speed) is defined as the average velocity of gas particles in a container. It is denoted by the letter 'v'.

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To calculate the root mean square (rms) speed for nitrogen molecules at 295 K, we can use the formula: v(rms) = √(3kT/m).

where v(rms) is the rms speed, k is the Boltzmann constant, T is the temperature in Kelvin, and m is the mass of one molecule of nitrogen, which is approximately 28 g/mol (or 0.028 kg/mol).Plugging in the given values, we get:

v(rms) = \(√[(3 x 1.38 x 10^-23 J/K) x (295 K) / 0.028\)kg/mol]

v(rms) = \(√(3.32 x 10^-21 J / 0.028\)kg/mol)

v(rms) = \(√(1.186 x 10^20 m^2/s^2)\)

Thus, the rms speed for nitrogen molecules at 295 K is:

v(rms) = \(√(1.186 x 10^20 m^2/s^2)\)≈ 513 m/s Therefore, the answer is 513 m/s.

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By performing a physics demonstration in front of the students. F is 9.79 x 108 newtons.

Given,

Mr. Gewanter weighs 60 kilograms (kg).

The weight of Martha is 55 kg.

d = 1.5 meters separates them.

The equation F = GMm/d2 newton determines the gravitational force between them.

changing the given values in the equation above

F = (6.673 x 1011 x 60 x 55)/1.52 = 9.79 x 108 newtons.

As a result, F = 9.79 x 108 newton is the gravitational pull Mr. Gewanter has on Martha.

A geostationary satellite travels in a circular path around the planet with a 36,000 km radius. The orbital period of a spy satellite will then be roughly (Re = 6400 km), orbiting a few hundred kilometers above the surface of the planet.

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Potential difference (in V) across the R₂ resistor is option E) 10

In the circuit given below, the capacitors are uncharged. The switch is then closed for a long time. R₁ = 6Ω, R₂ = 40 Ω, R3 = 40 Ω and V = 20V.

Find the potential difference across the R₂ resistor.Circuit Diagram:We can solve this question by following the below steps:

Step 1: Finding the Total Resistance

Let us assume the capacitors to be open circuit initially and solve the resistors R₁, R₂, and R₃ in series,

Rₛ.Rₛ= R₁ + R₂ + R₃= 6 + 40 + 40= 86Ω

Step 2: Calculating the Current

We can calculate the current flowing in the circuit by using Ohm's law, which is given as:

I = V/Rₛ = 20/86= 0.23A

Step 3: Finding the Potential Difference across R₂The potential difference across R₂ is given as:

V₂= IR₂= 0.23 × 40= 9.2V

Therefore, the potential difference (in V) across the R₂ resistor is 9.2V.

The option that matches the value is E. 10.

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Answer:

A

Explanation:

potential energy is usually at rest at the highest point in comparason to the ground

The velocity of the horse is 20 meters/second.

To find the velocity of the horse, we can use the formula:

velocity = distance / time

In this case, the distance is 1900 meters and the time is 95 seconds. Plugging in these values into the formula, we get:

velocity = 1900 meters / 95 seconds

Simplifying, we find that the velocity of the horse is:

velocity = 20 meters/second

Speed is the speed and the bearing of movement of an item. Speed is a basic idea in kinematics, the part of traditional mechanics that depicts the movement of bodies. Velocity. As a shift in course happens while the dashing vehicles turn on the bended track, their speed isn't steady.

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Answer:

No.

Explanation:

A feather is less dense and thus less force exerted while a rock is very dense thus exerting more force .

Answer: someone took down my answer I don’t know why when I took this test and got it right but the answer is C like the other person said.

Explanation:

The microwave radiation referred to in this context is radiation that was released as matter formed in the early universe. Therefore option A is correct.

Microwave radiation, also known as cosmic microwave background radiation (CMB), is a faint radiation that permeates throughout the universe.

It is considered to be the remnants of the thermal radiation released shortly after the Big Bang, during a phase called recombination. At this time, the universe transitioned from a hot, dense plasma to a state where neutral atoms could form, allowing photons to travel freely.

The cosmic microwave background radiation is isotropic, meaning it is uniformly distributed in all directions, and it has a characteristic temperature of approximately 2.7 Kelvin (-270.45 degrees Celsius).

It was first detected in 1965 by Arno Penzias and Robert Wilson, who were awarded the Nobel Prize in Physics for their discovery.

The presence of cosmic microwave background radiation provides strong evidence for the Big Bang theory and helps to support the understanding of the early universe's formation and evolution.

It serves as an important tool for studying cosmology and provides insights into the structure, age, and composition of the universe.

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Answer:

\(K.E=29.403125J\)

Explanation:

From the question we are told that

Mass \(M=100\)

Height \(50-20=30m\)

Generally the equation for velocity before impact is is is mathematically given by

\(v=\sqrt{2gh}\)

\(v=\sqrt{2*9.8*30}\)

\(v=24.25\)

Generally the equation for Kinetic Energy is is mathematically given by

\(K.E=\frac{1}{2}mv^2\)

\(K.E=\frac{1}{2}*100*(24.25)^2\\\)

\(K.E=29403.125J\)

\(K.E=29.403125J\)

The man will cover the horizontal distance with the velocity of efflux. And the required kinetic energy associated with the motion of man is

29.40 J.

When an object is in motion along a linear or curvilinear path, having some magnitude of velocity, then the energy associated with the object in that state is known as kinetic energy.

Given data -

The mass of the man is, m = 100 kg.

The height of the cliff is, H = 50 m.

The distance from the water surface is, h' = 20 m.

We can use the concept of efflux. When water comes out to some horizontal distance, then the velocity associated with the flow is known as the velocity of efflux.

Then mathematical expression for the velocity of efflux is,

\(v=\sqrt{2g(H-h')}\)

Here, g is the gravitational acceleration.

Solving as,

\(v=\sqrt{2 \times 9.8(50-20)}\\\\v = 24.25 \;\rm m/s\)

Now, the expression for the kinetic energy of man is given as,

\(KE = \dfrac{1}{2}mv^{2}\)

Solving as,

\(KE = \dfrac{1}{2} \times 100 \times 24.25^{2}\\\\KE = 29.40 \;\rm J\)

Thus, we can conclude that the kinetic energy of man diving out at 20 m from water is 29.40 J.

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Answer:

the speed of the satellite is 12,880.53 km/h

Explanation:

Given;

radius of the circular orbit, r = 24,600 km

time taken to revolve around Earth, t = 12 hours

The circumference of the satellite is calculated as;

L = 2πr

L = 2π x 24,600 km

L = 49,200π km

L = 154,566.36 km

The speed of the satellite;

v = L/t

v = 154,566.36 / 12

v = 12,880.53 km/h

Therefore, the speed of the satellite is 12,880.53 km/h

Answer:

C. mg sin(θ)

Explanation:

The plane is incline and the only force acting in the object is the gravity, so you multiply mg per sin(θ) because sin(θ) gave you the part of the gravity acting in the horizontal direction parallel with the inclined surface

The expression shows the net force on the object along the surface of the incline is mg sin(θ).  The correct option is C.

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

An object of mass m slides down an incline with angle (θ).

The plane is incline and the only force acting in the object is the gravity, The weight or gravity acting in the horizontal direction parallel with the inclined surface is  mg sin(θ).

Thus, the correct option is C.

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Answer:

10.4mm

Explanation:

2 pages = 1 leaf

200 pages = 100 leaves

100 × 0.10 = 10 mm thickness

Total thickness = 2(0.20) +10 = 0.4+10 = 10.4mm

According to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

option B is the correct answer.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In other words, an object will maintain its state of motion (whether it is at rest or moving in a straight line at a constant speed) unless a force acts upon it.

Thus, according to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

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Answer:

its B

Explanation:

Answer: Its applied force and friction, The friction is the drag and the applied force is you pushing

Option B. The force of friction between the surface and the object is less than the component of the gravitational force that is parallel to the ramp.

The force of friction between the floor and the item is less than the thing of gravitational pressure this is parallel to the ramp; If the item improved in mass, the item's acceleration would exchange.

Friction is the shape of touch stress. It exists between the surfaces that are in contact. The frictional force relies upon the person on the ground in contact. The rougher the floor, the extra friction is concerned. The frictional force is proportional to the urgent stress, that is the burden of the body. it's miles impartial of the region of the contact.

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Disclaimer:- your question is incomplete, please see below for the complete question.

a. The force of friction acts in the same direction as the object travels.

b. The force of friction between the surface and the object is less than the component of the gravitational force that is parallel to the ramp.

c. If the object increased in mass, the object's acceleration would change.

d. If the object increased in mass, the normal force exerted on the object would remain the same.

Explanation:

tan ● = opposite / adjacent

tan 31.5 = 19 / F

0.613 = 19 / F

0.613F = 19

F = 31

sin ● = opposite / hypotenuse

sin 31.5 = 19 / a

0.52 = 19 / a

0.52a = 19

a = 36. 36

Using trigonometry, the base of the triangle is approximately 33.476, and the hypotenuse of the triangle is approximately 38.118.

To find the base and hypotenuse of a right triangle with one angle of 31.5 degrees and a given height of 19:

Here,

Opposite side = height = 19 (given)

Adjacent side = base (unknown)

Hypotenuse = hypotenuse (unknown)

First, let's find the base (adjacent side):

tan(θ) = opposite ÷ adjacent

tan(31.5 degrees) = 19/base

To find the base, we can rearrange the equation:

base = opposite ÷ tan(θ)

base = 19 ÷ tan(31.5 degrees)

Calculating the value:

base ≈ 33.476

So, the base of the triangle is approximately 33.476.

Now, using the Pythagorean theorem, we can write:

hypotenuse² = base² + opposite²

hypotenuse² = (33.476)² + 19²

hypotenuse ≈ 38.118

Therefore, the hypotenuse of the triangle is approximately 38.118.

Thus, base is 33.476, and hypotenuse is 38.118.

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Answer:

Part of the energy input is wasted. It is used to increase the entropy of the surroundings. Therefore, the useful energy output is necessarily smaller than the energy input. In other words, the efficiency of a heat engine is always less than 100%.

The output force on the piece of food the chopsticks pick up is mechanical advantage times 3 N.

The force amplified by utilising a tool, mechanical device, or machine system is known as mechanical advantage. To achieve the desired output force amplification, the gadget trades off input forces against movement.

Mathematically:

mechanical advantage = output force/input force

Given that input force = 3 N.

Hence, output force = mechanical advantage × 3 N.

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The equivalent inductance L(eq) for the series connection is 8 mH.

To find the equivalent inductance L(eq) the given values are 3.5 mH and 4.5 mH.

  Inductance is series are usually added to get our equivalent inductance. The total circuit inductance L(eq) is equal to the sum of all the individual inductances in the circuit when they are added together.

Thus, Inductance L1 = 3.5 mH

         Inductance L2 = 4.5 mH

Inductance in series, Ls = L1 + L2

                                = 3.5 mH + 4.5 mH

                                = 8 mH.

Thus, the equivalent inductance L(eq) is 8 mH.

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Answer:

12 ml

Explanation:

The initial volume in the cylinder is 20 ml

 adding the rock adds volume to the cylinder

       the new volume is 32 ml .....the increase in volume is the volume of the rock :   32 - 20 = 12 ml    volume of rock

A magnetic field is a vector field that explains the magnetic effect on moving charges, currents, and magnetic materials.

The magnetic field is the area around a magnetic material or a moving electric charge where the power of magnetism works. A diagram of the magnetic field that depicts how a magnetic force is spread within and around a magnetic substance.

The region encircling a magnetic dipole or a moving charge generates a magnetic field. The SI measure of field strength for magnetic fields is Tesla (T). The magnetic field is the region around a magnet where one can feel the magnetic pull.

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Answer:

Refractors telescopes utilize specially designed lenses to focus the light on an image. A Reflector telescope uses mirrors, which causes light to reflect at different angles within the optical tube and extends the overall light path.

Answer:

The reflective telescope uses mirrors to catch light and reflect it to the eyepiece. A refractive telescope is kinda' the same except it can focus in on the light.

Explanation:

Answer:Lead by an example

Practice what you preach. You'll never convince anyone to conserve water if you aren't doing it yourself.

Engage with others.

Seek out allies.

Give people a reason to save.

Provide entry-level strategies.

Encourage others to challenge themselves.

Think big.

Choose a monthly focus.

Answer:

Active stretching.

Explanation:

Think about it.

Answer:

Sound travels fastest through solids because they have the highest density and the molecules are closest together. This allows for the sound waves to transfer more quickly through the material.

Answer:

The first one is: His weight on the Earth before take-off and the weight after take-off back on Earth once he gets back should be recorded as his Independent variable and his dependent variable.

The second one is: If he gained the weight back that he had lost while on the trip then you should disregard them unless that was the weight he was when he weighed himself after he got back.

The Third one is: The mass of an object is the amount of matter it contains, regardless of its volume or any forces acting on it. … Gravity is a force that attracts objects toward the Earth. The weight of the object is defined as the force caused by gravity on a mass.

Explanation:

I took  the quiz earlier. Hope this Helps you.

The composition of the particles forming Saturn's rings is primarily made up of water ice.So option D is correct.

The Saturn's Rings are the set of 7 rings that surround the planet of Saturn. They are the most noticeable feature of Saturn and are classified according to their order in the planet, starting from the closest ones (D Ring) and ending with the farthest ones (F Ring). Each of the rings is made up of millions of individual objects ranging in size from tiny grains to enormous chunks that are miles in diameter.The composition of the particles forming Saturn's rings:Saturn's rings are formed of many tiny ice particles, which range in size from tiny grains to objects that are several meters in diameter. The rings are comprised of 99.9 percent ice, which is mostly water ice, but also some methane and ammonia ice. The ice particles in the rings are coated with silicates, carbon, and organic materials, and their size distribution ranges from smaller than a grain of sand to larger than a house.

Therefore option D is correct.

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The energy output is 714 Watts is loss.

According to the thermal conductivity equation, the rate of heat loss H is given by:

H=\swhere,

K is the heat conductivity coefficient.

A is for Area of Cross Section.

H = Heat loss rate

Temperature differential between the two sides of the body in the given situation: x-Thickness of the material 71 -1

T = 37°C, or body temperature, and 12°C, or room temperature

initial instance.

A=2m x=0.01 m

H=174watt

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The equation below is completed by the chromium nucleus.

Chromium is mostly found in chromite. The locations where this ore can be found include South Africa, India, Kazakhstan, and Turkey. In an electric arc furnace, chromite is often reduced with carbon to generate chromium metal, as is chromium(III) oxide when it is reduced with silicon or aluminum.

An important mineral called chromium helps insulin work properly in the body by regulating blood sugar levels. Your body uses the hormone insulin to convert sugar, starchy carbs, and other foods into the energy you require for daily activities.

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