the force is the sum of all the forces that act upon an object

formula for wavelength = speed/frequency

So 1500/200 = 7.5 meters

The wavelength of the wave is 7.5m.

The wavelength of light is described as "the distance between two consecutive peaks or troughs of a light wave" which is denoted by the Greek letter lambda (λ). Therefore, the distance between one crest or trough of one wave and the next wave is known as wavelength.

Wavelength can be expressed as:

[tex]\lambda=\frac{v}{f}\\\lambda = wavelength\\{v} = velocity\\{f} = frequency[/tex]

λ represents wavelength which is expressed in meters. The v is wave velocity that is calculated as meters per second (mps) and the f stands for frequency, which is measured in hertz (Hz).

For above given information,

speed of a wave is 1500 m/s

frequency is 200 Hz

So, wavelength= 1500/200= 7.5m

Thus, the wavelength of the wave is 7.5m.

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Answer:

A Brief burst of intense exercise

Explanation:

Apex

Answer:

7.4

Explanation:

Assume they weigh the same: If Sally is pushed harder than Bill,  Bill would come back sooner, Bill has a greater amplitude.  Assume Bill is heavier than Sally: If both are pushed equally hard, Bill would come back sooner, Sally has a greater amplitude

Explanation:

The amplitude of a wave refers to the maximum amount of displacement of a particle on the medium from its rest position. In a sense, the amplitude is the distance from rest to crest. Similarly, the amplitude can be measured from the rest position to the trough position.

In simpler terms, amplitude stands for the maximum extent of a vibration or oscillation, measured from the position of equilibrium. Amplitude is proportional to the energy of a wave, a high energy wave having a high amplitude and a low energy wave having a low amplitude.

Answer:

12,750

Explanation:

P = mv

Momentum = Mass x Velocity

Plug it in and finish equation

Answer:

P=12,750kgm/s

Explanation:

Momentum (P) = mass x velocity

Where velocity =15m/s

Mass=850kg

Therefore, momentum(P) = (850kg) x (15m/s)=12,750kgm/s

Hence,the momentum of the train is 12,750kgm/s

Answer:

carbon

Explanation:

Answer:

It is easier to move empty cart than of moving 20 empty carts because of surface that can affect balancing the carts in same array which makes the carts of array to move in different directions.

Final answer:

It's easier to get one empty cart moving than 20 because a single cart has less inertia and friction to overcome compared to the combined inertia and friction of 20 carts.

Explanation:

The question you've asked pertains to the subject of physics, specifically the principles of inertia and momentum. Inertia is the tendency of an object to resist changes to its state of motion. When you have one empty cart, the inertia is relatively low compared to a line of 20 empty carts. Therefore, it requires less force to get one cart moving than 20 carts because the combined inertia of all the carts is greater, hence more force is needed to overcome it.

In addition to inertia, frictional forces also play a part. Each cart adds its own frictional resistance to the total system. Thus, when you try to push 20 carts, you're trying to overcome the frictional force of 20 sets of wheels on the surface as opposed to just one. This makes it substantially more difficult to get the line of carts moving compared to just one cart.

Answer:

4. hours to travel 350km going at a rate of 80km/hr.

Explanation:

Well first you must divide 350/80=4.375~4.

Answer: 4.375 hours

Explanation:

350 divided by 80 = 4.375

Answer: 4N downward

Explanation: If 16N is applied on both the right and left then the object isn't moving either way, so we are left with 4N.

"The net force on the object is 4N downward.

To find the net force acting on the object, we need to consider the vector sum of all the individual forces. Forces acting in opposite directions (to the right and to the left in this case) will cancel each other out.

Given the forces:

- 16N to the right

- 16N to the left

- 4N downward

Since the forces to the right and to the left are equal in magnitude (16N), they will cancel each other out. This leaves us with only the downward force to consider for the net force.

Therefore, the net force [tex]\( F_{net} \)[/tex]is simply the downward force:

[tex]\[ F_{net} = 4N \text{ (downward)} \][/tex]

The horizontal components of the force (to the right and to the left) have no net effect on the object's motion because they are equal and opposite, so they sum to zero in the horizontal direction. The only unbalanced force is the 4N acting vertically downward. Hence, the net force on the object is 4N downward."

A) Force: 0.0528 N

B) Power dissipated: 0.307 W

C) Power delivered: 0.307 W

Explanation:

A)

The  force experienced by a current-carrying wire in a magnetic field is given by

[tex]F=ILB[/tex]

where

I is the current in the wire

L is the length of the wire

B is the strength of the magnetic field

In this problem, we have:

L = 0.451 m

B = 0.751 T

I = 0.156 A

Therefore, the force is

[tex]F=(0.156)(0.451)(0.751)=0.0528 N[/tex]

B)

The rate of energy dissipation in the resistor is the power dissipated in the resistor, and it is given by

[tex]P=I^2R[/tex]

where

I is the current in the resistor

R is the resistance

For the wire in this problem,

I = 0.156 A

[tex]R=12.6\Omega[/tex]

Therefore, the power dissipated is

[tex]P=(0.156)^2(12.6)=0.307 W[/tex]

C)

The mechanical power delivered to the rod is given by

[tex]P=VI[/tex]

where

V is the potential difference across the rod

I is the current in the rod

The potential difference across the rod must be equal to the potential difference across the resistance, which can be  found by using Ohm's law:

[tex]V=RI=(12.6 \Omega)(0.156 A)=1.97 V[/tex]

Therefore, the power delivered to the rod is

[tex]P=(1.97 V)(0.156 A)=0.307 W[/tex]

This power is equal to the power dissipated on the resistor: this is due to the law of conservation of energy, in fact the total energy must remain constant, so here the electric energy is transformed into mechanical energy of motion of the rod.

Answer:

Fields

Explanation:

The presence of a magnet's magnetic field best explains why a magnet can act at a distance on other magnets or objects containing certain metals. The magnetic field is an invisible force field that extends from the magnet, wherein other magnets or certain metals are influenced.

The feature of a magnet that allows it to act at a distance on other magnets or on objects containing certain metals is its magnetic field. A magnet's magnetic field is an invisible force field that extends out from the magnet in a pattern similar to the pattern formed by evenly spaced, radiating lines. Within the magnetic field, other magnets or certain metals are pushed or pulled by the magnetic force. For example, if you slowly bring a piece of iron closer to a magnet, you will feel the iron being attracted towards the magnet even before it physically touches the magnet. That's the magnetic field in action.

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The baseball takes 0.8 s to travel a distance of 20 m at a speed of 25 m/s.

Explanation:

It is known that speed is the rate at which any object covers a particular distance.

So [tex]speed =\frac{\text { distance }}{\text { time }}[/tex]

Hence, it is known that speed is directly proportional to distance covered and inversely proportionate to the time taken to cover this distance.

Similarly, the time taken by any object to cover a distance is directly proportionate to the distance and inversely proportionate to the velocity of the object.

As the distance is given as 20 m and speed is given as 25 m/s, then the time can be easily obtained by finding the ratio of distance to speed.

Here,

          [tex]\text { Time }=\frac{\text {distance}}{\text {speed}}=\frac{20}{25}=0.8 \mathrm{s}[/tex]

Thus, the baseball takes 0.8 s to travel a distance of 20 m at a speed of 25 m/s.

To calculate the velocity of sound in air using the given information, we'll use the formula:

Speed=(distance)/(Time).Therefore, the velocity of sound in air is 332m/s.

To calculate the velocity of sound in air using the given information, we'll use the formula:

Speed=(distance)/(Time)

Given:

Time taken for the echo(t) = 0.2 seconds

Distance between the person and the hill(d) = 33.2 meters

Firstly, recognize that the sound traveled twice the distance (to the hill and back) to create the echo.

So, the actual distance the sound traveled is 2×distance=2×33.2meters=66.4meters.

Next, use the formula for speed:

Speed=(distance)/(Time)

Speed=(66.4m)/(0.2s)

Speed=332m/s

Therefore, the velocity of sound in air is 332m/s.

Which statements describe the Mercalli scale? Check all that apply.

A. This scale measures seismic waves based on their size.

B. This scale rates an earthquake according to how much damage it causes.

C.This scale produces a single rating for earthquakes that reach the surface.

D. This scale uses Roman numerals to rank the damage caused by an earthquake.

E.This scale measures the magnitude of an earthquake based on the size of seismic waves.

The Mercalli scale : This scale rates an earthquake according to how much damage it causes and This scale uses Roman numerals to rank the damage caused by an earthquake.

The Modified Mercalli scale is intended to illustrate the consequences of an earthquake, at a contracted station, on tangible characteristics, on modern fittings and human beings.

The Modified Mercalli Intensity value ascribed to a particular site subsequent an earthquake has an extra significant means of severity to the nonscientist than the magnitude because intensity assigns to the outcomes really encountered at that position. This scale is comprised of 12 growing levels of intensity, denoted by Roman numerals, arranging from gradual shaking to catastrophic impairment.

Answer:

A

Explanation:

Transformation rule : The coordinates change by the rule when the figure rotate 90 degrees about the origin is given by

[tex](x,y)(-y,x)[/tex]

Transformation rule: When the figure reflected across x- axis then the coordinates change by the rule

[tex](x,y)(x,-y)[/tex]

The given figure cut x - axis at x=3

The coordinates (3,0).

After 90 degrees rotation about origin the coordinates becomes (0,3).

After reflection across x- axis , the coordinates becomes (0,-3).

Only in first figure, there is (0,-3) .

Hence, the option A is true.

B) 37 V

The potential difference between point a and point b is equal to 37 V

The potential difference across a and b can be calculated by finding the equivalent resistance of the resistors R1, R2 and R3 and then by applying Ohm's law.

Given:

R1 = 3.0 Ω

R2 = 8.0 Ω

R3 = 10.0

Current = I = 5 A

To calculate equivalent resistance of the circuit:

R2 and R3 are connected in parallel configuration. The equivalent resistance of R2 and R3 can be calculated as

[tex]\frac{1}{R_p} =\frac{1}{R_2} + \frac{1}{R_3} \\\\\frac{1}{R_p}=\frac{1}{8} + \frac{1}{10}= \frac{5+4}{40} = \frac{9}{40} \\\\ \frac{1}{R_p}=\frac{9}{40} \\\\R_p=\frac{40}{9}\ ohms[/tex]

Resistance R1 is in series with Rp. The equivalent series resistance is calculated as

[tex]R_s = R1+R_p = 3+\frac{40}{9}= \frac{27+40}{9} = \frac{67}{9} = 7.44\ ohms[/tex]

Thus the given 3 resistor circuit can be written as an equivalent resistance Rs equal to 7.44 Ω through which current I passes.

By Ohm's law;

If V is the potential difference between a and b

Potential difference across points a and b = Current flowing through the circuit × Resistance between points a and b

[tex]V = I\times R_s = 5\times 7.44 = 37.2\ V[/tex]

37.2 V ≈ 37 V

Therefore, the potential difference between point a and point b is equal to 37 V

Answer:

Explanation:

37V

Answer:

C. The provider's success claims seem too good to be true.

Answer:

The less distance between the objects, the more force there is between them.

Relationship between the gravitational force and distance shown in the graph is

>increases, decreases.

As most gravitons exist in a cloud around any object so when distance from the object increases, the density of the graviton cloud goes decreases. There is less gravitational attraction due to this.

The relationship between the force of gravity and distance between the objects is explained by inverse square law. This implies that the force of gravity between objects is inversely proportional to the square of the distance.

Any influence that causes an object to undergo a change is called force. Distance implies how far an object travels over a period of time. When the force applied is greater on an object, it will travel more distance.

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Earth is surrounded by a magnetic field because of the rotating electric currents by the charged metallic particles in the earth crest.

On earth, electric currents are produced by the movement of liquid metal in the planet's outer core. These electric currents combine to create a magnetic field that surrounds the globe as a result of Earth rotating on its axis.

The magnetic field is crucial to keeping life on Earth alive. Without it, we would be exposed to a lot of solar radiation and our atmosphere would be unrestricted in its ability to escape into space.

A stream of charged particles emerging from the sun, interacts with the magnetic field that stretches from the interior of the earth into space. Electric currents caused by the movement of convection currents of a combination of molten iron and nickel in the earth's outer core produce the magnetic field.

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Final answer:

The statement is true; atoms with electronegativity differences below 0.4 typically form covalent bonds, with a bond being considered nonpolar covalent when the electronegativity difference is less than 0.4.

Explanation:

The statement that atoms with electronegativity differences below 0.4 generally form covalent bonds is true. In chemistry, the electronegativity difference between bonding atoms is a determinant of the type of bond they will form. If the difference in electronegativities is less than about 0.4, the bond is typically considered nonpolar covalent, where the bonding electrons are shared equally between the two atoms, and the distribution of electrical charge is balanced. When the electronegativity difference is between 0.4 and about 1.7, the bond is classified as polar covalent, meaning electrons are not shared equally, leading to a partial charge distribution within the molecule.

An electronegativity difference of zero indicates an absolute nonpolar covalent bond, while significantly higher differences (usually greater than about 1.8) suggest the bond will be ionic in character, where electrons are transferred from one atom to another, resulting in the formation of ions.

Answer: Option A. They follow a repeating pattern as they propagate

Explanation:

Answer:

float

Explanation:

a less dense material will float when placed in a material that is more dense than itself. The reverse is also true, that a denser material will sink when placed into into a less dense material.

The heat required to change 1.25 kg of steak is 2825 kJ /kg.

Explanation:

Given, mass m = 1.25 kg,     Temperature t = 100 degree celsius

To calculate the heat required,

                                 Q = m [tex]\times[/tex] L

where m represents the mass in kg,

          L represents the heat of vaporization.

When a material in the liquid state is given energy, it changes its phase from liquid to vapor and the energy absorbed in this process is called heat of the vaporization. The heat of vaporization of the water is about 2260 kJ/kg.

                                  Q = 1.25 [tex]\times[/tex] 2260

                                  Q = 2825 kJ /kg.

Answer:

Turbines in coal factories

Explanation:

Turbines in coal factories use steam power to move the turbine flaps and generate static electricity as energy output.

Explanation:

a machine or a device that transfers the motion of a hot gas to motion of an object is a rocket ship.

Answer:

[tex]44.27m/s[/tex]

Explanation:

The kinematic equation

[tex]v_f^2=v_0^2+2ad[/tex]

gives the final velocity [tex]v_f[/tex] of the object given the initial velocity [tex]v_0[/tex], the acceleration [tex]a[/tex], and the distance traveled [tex]d[/tex].

For our case, the object is dropped; therefore,

[tex]v_0=0[/tex]

I.e. the initial velocity is zero. The acceleration due to gravity is

[tex]a=9.8m/s^2[/tex],

and the distance traveled is [tex]d=100m[/tex].

Putting the values into the equation we get:

[tex]v_f^2=0+2(9.8ms^{-2})(100m)\\\\v_f^2=1960\\\\v_f=\sqrt{1960} \\\\\boxed{v_f=44.27m/s}[/tex]

The final velocity of the object is 44.27 m/s.

Answer: A. 1.77x10-² N

Explanation: Newton's Law of Universal gravitation is expressed in the following formula:

F= G x ( m1 x m2 ) / r²

= 6.673x10-¹¹ N.m²/kg² ( 2.0x10⁴ kg x 3.0x10⁴ kg) / (1.5m )²

= 0.0177 N or 1.77x10-² N

Answer:

2621.25 meters

Explanation:

First, write down what we are given.

Initial velocity = 27.5 m/s

Final velocity = 42.4 m/s

Time = 75 seconds

We need to look at the kinematic equations and determine which one will be best.  In this case, we need an equation with distance.  I am going to use [tex]v_{f}^{2} = v_{i}^{2} +2ad[/tex], but you can also use the other equation, [tex]x = v_{o}t+\frac{1}{2}at^{2}[/tex]

We need to find acceleration.  To find it, we need to use the formula for acceleration: [tex]a = \frac{v_{f}-v_{i}}{t}[/tex].  Plugging in values, [tex]a = \frac{42.4-27.5}{75} = .199\ m/s^{2}[/tex]

Next, plug in what we know into the kinematics equation and solve for distance.  [tex]42.4^{2} = 27.5^{2} + 2(.199)(d)\\d = 2621.25\ meters[/tex]

This is a false statement. Newton's first law says that if the net force on an object is zero, the object stays in UNIFORM MOTION. That means it keeps moving at a constant speed, in a straight line. It can certainly have some speed, in some direction, but without any net force, they CAN'T CHANGE.

Answer:

C. positron

Explanation:

Antimatter particles bind with each other to form antimatter, just as ordinary particles bind to form normal matter. For example, a positron (the antiparticle of the electron) and an antiproton (the antiparticle of the proton) can form an antihydrogen atom.

There you go.

Answer:C. positron

Explanation:

Answer:

25J

Explanation:

Kinetic energy = 1/2 mv²

Mass = m= 0.5kg

Velocity = v = 10m/s

K. E = 1/2 x 0.5 x 10 x 10

K. E = 0.5 x 5 x 10

K. E = 2.5 x 10

K. E = 25 J

The S. I unit of energy is joules with symbol J

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Answer:

A.) 25j

Explanation:

k= 1/2mv^2