Ayo? i need help asap
Let's do some calculation! Using the information below, calculate the speed of the wave. MAKE SURE TO INCLUDE YOUR UNITS!

wavelength = 2.3 cm and frequency = 3.7 Hz

Answer:

The density is 1.1gcm3

Answer:

The correct answer is D.

Explanation:

Im pritty sure;)

Answer:

D

Explanation:

edge

Strong x-ray beams can be produced when cathode rays strike a metal anode.

This process is known as the production of bremsstrahlung radiation. When high-speed electrons, also called cathode rays, are accelerated and then collide with a metal target, they are abruptly decelerated, and the kinetic energy lost is converted into X-ray photons.

The resulting X-ray beam produced can be strong and intense, and its properties depend on the energy of the incident electrons and the material of the target.

Gamma rays moving through a magnetic field, alpha rays passing through a thin metal foil, or beta rays being absorbed by bones do not directly produce strong X-ray beams.

In summary, the correct answer is A) cathode rays striking a metal anode can produce strong X-ray beams.

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We get: sinθ = (1)(0.17)/0.3, which simplifies to θ = sin^-1(0.17/0.3) = 33.6°. In the values for m (1), λ (0.034 m), and θ (33.6°), we get: d = (1)(0.034)/sin(33.6°) = 0.063 m = 6.3 cm. The frequency of light that gives the same first-order maximum angle is 3.00 x 10^8 Hz, which is in the radio wave part of the electromagnetic spectrum.

(a) To find the angle of the first-order maximum, we can use the equation: sinθ = mλ/d, where θ is the angle of diffraction, m is the order of the maximum (in this case, m = 1), λ is the wavelength of the sound wave (in this case, λ = v/f = 340/2000 = 0.17 m), and d is the slit separation (d = 30 cm = 0.3 m). Plugging these values into the equation, we get: sinθ = (1)(0.17)/0.3, which simplifies to θ = sin^-1(0.17/0.3) = 33.6°.

(b) To find the slit separation that gives the same angle for the first-order maximum with 3.40 cm microwaves, we can use the same equation as in part (a), but with different values for λ and d. We want to solve for d, so we can rearrange the equation as: d = mλ/sinθ. Plugging in the values for m (1), λ (0.034 m), and θ (33.6°), we get: d = (1)(0.034)/sin(33.6°) = 0.063 m = 6.3 cm.

(c) To find the frequency of light that gives the same first-order maximum angle with a slit separation of 1.00 m, we can use the same equation as in parts (a) and (b), but with different values for λ and f. We want to solve for f, so we can rearrange the equation as: f = m*v/d. Plugging in the values for m (1), v (speed of light = 3.00 x 10^8 m/s), and d (1.00 m), we get: f = (1)(3.00 x 10^8)/1.00 = 3.00 x 10^8 Hz. So the frequency of light that gives the same first-order maximum angle is 3.00 x 10^8 Hz, which is in the radio wave part of the electromagnetic spectrum.

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Answer:

Because even if iron is magnetic its not a magnet it self unless rubbed a magnetic object

Answer:

With regards to NASA's ambition to send humans to Mars, is an encouraging idea.  Also, the aim of sending food supply by unmanned spacecraft before the 2030 project though noble is filled with constraints and design problems.

For the constraints,

1. The spacecraft could be lost on the space before it reaches its destination being Mars. This is because, lack of communication between the control unit on earth and the spacecraft signify it being lost forever.

2. The food supply is bound to spoil on Mars since it would be stored unrefrigerated. This is as a result of the actions of the micro organisms acting on them.

For the criteria for the engineering design problem:

1. The distance between earth and Mars is very far

2. Not factoring in the preservation method into the unmanned aircraft.

Explanation:

The Hall-Petch effect states that the yield strength of a material increases as the grain size decreases.

To determine if this material follows the Hall-Petch effect, we need to plot the yield strength as a function of the inverse square root of the grain size. Using the given data, we can plot the yield strength (in MPa) against the inverse square root of grain size (in μm^-1/2). This gives a linear relationship with a negative slope, indicating that the material follows the Hall-Petch effect. To determine the value of k in the Hall-Petch equation, which is expressed as σ_y = σ_0 + k/d^1/2, where σ_y is the yield strength, σ_0 is the frictional stress, k is the strengthening coefficient, and d is the grain size, we can perform a linear regression on the data. The slope of the line gives the value of k, which is approximately 148 MPa*μm^1/2. To estimate the yield stress for a grain size of 60 μm, we can use the Hall-Petch equation with the value of k obtained from the linear regression. Plugging in the values, we get σ_y = σ_0 + 148/60^1/2 ≈ 118 MPa. Therefore, the estimated yield stress for a grain size of 60 μm is approximately 118 MPa.

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The work done by the magnetic field in one orbit is: \(W = ΔU= -m(b)r\)Now, the kinetic energy gained by the electron in one orbit is given by: KE = W. Therefore,\(KE = -m(b)r\). The kinetic energy gained by the electron in one orbit is -m(b)r.

a) Relativistic momentum of an electron:Relativistic momentum can be determined using the given formula:

m = (γ) moLet’s put the given values into the above equation.

The speed of light = c

Radius of orbit = r

Magnetic field = B

Now, we need to calculate the momentum. Therefore, we use the following formula:

\(p = mv\)

Using this formula, we get:

\(p = (γ) mo c\)

Therefore, the momentum of the electron is p = (γ) mo c.b) Energy gained by an electron:Given data:

Radius of orbit = r

Magnetic field = \(B= Bo + bt\) (where b and Bo are positive constants)

The expression for the force on an electron moving perpendicular to a magnetic field is given by

:\(F = Bqv\)

Where v is the velocity of the electron and q is its charge. Here, the direction of the force is perpendicular to both the velocity and the magnetic field.

As the magnetic field increases, the force on the electron will increase. The electron will spiral outwards. However, the energy of the electron remains constant.

This means that the kinetic energy of the electron must increase as its velocity increases, in order to maintain the radius of the circular path. The kinetic energy gained by the electron in one orbit can be calculated as follows: KE = work done by the magnetic field on the electron

The work done on the electron by the magnetic field is given by the change in magnetic potential energy. The magnetic potential energy is given by:\(U = -mB\)

The negative sign is due to the fact that the electron has a negative charge. As the magnetic field increases, the magnetic potential energy of the electron increases. The change in magnetic potential energy is given by:ΔU = -mΔB

Substituting the value of magnetic field, we get:

\(ΔU = -m(b)r\)

Therefore, the work done by the magnetic field in one orbit is:

\(W = ΔU= -m(b)r\)

Now, the kinetic energy gained by the electron in one orbit is given by:KE = W

Therefore,\(KE = -m(b)r\)

The kinetic energy gained by the electron in one orbit is -m(b)r.

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Answer:

Voltage V = 117.65 volts

the voltage across the light bulb's filament is 117.65 V

Explanation:

The power of a light bulb can be expressed with respect to voltage and current flow.

Power = voltage × current

P = VI

Making Voltage V the subject of formula;

V = P/I

Given;

Power P = 4.0W

Current I = 0.034A

Substituting the given values;

V = 4/0.034

V = 117.65 volts

Answer:

the pressure of fruit juice is smaller

the pressure of water is bigger

Explanation:

Answer:

the innermost layer of the earth

Explanation:

the earth has an outer core liquid and an inner core solid they are not chemically distinct from each other but they are chemically distinct from the mantle the core is mainly composed of nickel and iron

When a loose brick is resting on a wall, it has potential energy. When the brick is pushed off the wall and is falling down, the amount of potential energy is decreasing while the amount of kinetic energy is increasing.

Kinetic energy is motion––of waves, electrons, atoms, molecules, substances, and objects. Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy.

Conservation of energy is not saving energy. The law of conservation of energy says that energy is neither created nor destroyed. When we use energy, it doesn’t disappear. We change it from one form of energy into another.

A car engine burns gasoline, converting the chemical energy in gasoline into mechanical energy. Solar cells change radiant energy into electrical energy. Energy changes form, but the total amount of energy in the universe stays the same.

Energy efficiency is the amount of useful energy you get from a system. A perfect, energy-efficient machine would change all the energy put in it into useful work—an impossible dream. Converting one form of energy into another form always involves a loss of usable energy.

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The correct choice is the third option.

This comes from the fact that the packing material cushions the impacts of the content in case of a fall.

Answer:

The earth is hotter

Explanation:

the average temperature on earth is 57 degrees Fahrenheit the average on the moon is -298 degrees Fahrenheit

The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about 1.22 m .

Option B is correct .

The player will be free falling because the basketball takes the same amount of time to ascend and descend. for 0.5 seconds. Time equals 0.5 seconds when he reaches his maximum height.

Distance is given by from the laws of motion equation :

                        s = ut + 1/2 at²

                        s = 0 × t + 1/2 × 9.81 × [ 0.5 ]²

                        s = 0 + 1/2 × 9.81 × 0.25

                         s = 1.22 m

According to the first law, a force acting on an object will not cause it to change its motion. According to the second law, an object's force is proportional to its acceleration divided by its mass.

According to the third law, when two objects interact, they exert forces of equal magnitude in opposite directions. The three conditions of movement are as per the following: v = u + at is the first equation of motion. s = ut + 1/2 at² is the solution to the second motion equation. The formula for the third motion equation is v² = u² + 2as.

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Frost typically forms on the inside surface of a windowpane (rather than the outside) because the interior of a room is usually warmer and more humid than the exterior.

When the temperature drops below freezing outside, the warm and humid air inside the room comes into contact with the cold windowpane. This causes the moisture in the air to condense and freeze on the glass, forming frost. Since the outside temperature is already cold and dry, there is no additional moisture in the air to create frost on the outside of the window.

The inside surface of a windowpane becomes colder than the outside surface due to the difference in temperature between the indoor and outdoor environments. When the warm, moist air inside the room comes into contact with the colder surface of the windowpane, the moisture in the air condenses and freezes, forming frost on the inside of the windowpane. This occurs because the air can no longer hold as much moisture when it is cooled, causing the excess water vapor to change from gas to solid state (frost).

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The height, length, and period of a wave depend upon three main factors: the length of time the wind has blown, the fetch, and the wind speed.

1. Length of time the wind has blown: This factor refers to the duration for which the wind has been blowing over the water surface. The longer the wind blows, the more energy it transfers to the water, leading to larger waves. As a result, the height, length, and period of a wave are influenced by the length of time the wind has blown.

2. Fetch: Fetch is the distance over which the wind blows in a constant direction across the water surface. The larger the fetch, the more space there is for the wind to transfer energy to the water, and the larger the resulting waves will be. Therefore, the height, length, and period of a wave are affected by the fetch.

3. Wind speed: The speed of the wind is another critical factor in determining the characteristics of a wave. Faster winds have more energy to transfer to the water, creating larger waves with higher heights, longer lengths, and longer periods. As such, the height, length, and period of a wave depend on the wind speed.

In summary, the height, length, and period of a wave are influenced by the length of time the wind has blown, the fetch, and the wind speed. These factors work together to determine the overall size and shape of the waves that form on the water surface.

Understanding these factors can help predict the behavior of waves and their potential impact on coastal areas and marine activities.

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The frame of reference of a witness watching a gunfight from the other side of the street would be an inertial frame of reference.

An inertial frame of reference is a frame of reference where, excluding external forces, a body in motion maintains a constant speed in a straight line, and a body at rest remains at rest. In this instance, the witness is stationary in relation to the street and is not speeding up while watching the gunfight. As a result, the witness's frame of reference can be regarded as inertial.

It is important to remember that the witness's frame of reference would not be inertial if they were moving or speeding up while watching the gunfight, and they would have to account for this when doing so.

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In the first case, the momentum is 4,860,000Kgm/s while in the second case, the momentum is 4,550,000Kgm/s.

The term momentum of a body refers to the product of mass and velocity. It is a vector quantity.

In the first case;

momentum = 81,000Kg * 60m/s = 4,860,000Kgm/s

In the second case, we must find the resultant velocity V

V = √(25)^2 + (43)^2

V = 50 m/s

Hence;

Momentum = 91000Kg * 50 m/s

= 4,550,000Kgm/s

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Answer:

A. It is colder at the top of a mountain

Explanation:

Answer:

I believe its the second oneee

Answer:

latitude my guy

Explanation:

north south

Answer: 1.5 × 10^-17

Explanation:

Given the following :

Frequency(f) = 2.2 × 10^16 Hz

Planck's constant(h) = 6.63 × 10^-34

The energy of a photon 'E' is given as the product of frequency and the planck's constant

E = hf

E = (6.63 × 10^-34) × (2.2 × 10^16)

E = 6.63 × 2.2 × 10^(-34 +16)

E = 14.586 × 10^-18

E = 1.4586 × 10^-17

E = 1.5 × 10-17 (2 S. F)

Answer:

C. 1.5 × 10–16 J

Explanation:

The final temperature of a metal can be calculated by using its specific heat capacity, which in this case is given as 0.128 J/(g⋅°C). When 305 J of heat is added to 29.4 g of the metal initially at 20.0 °C, the final temperature, denoted as Tfinal, can be determined.

To find the final temperature, we can use the equation Q = mcΔT, where Q represents the heat energy transferred, m is the mass of the metal, c is its specific heat capacity, and ΔT is the change in temperature. Rearranging the equation to solve for ΔT, we have ΔT = Q / (mc).

Given that Q is 305 J, m is 29.4 g, and c is 0.128 J/(g⋅°C), we can substitute these values into the equation. ΔT = 305 J / (29.4 g * 0.128 J/(g⋅°C)) = 225.52 °C.

To find the final temperature, we add the change in temperature (ΔT) to the initial temperature. \(Tfinal = 20.0 °C + 225.52 °C = 245.52 °C.\)

Therefore, when 305 J of heat is added to 29.4 g of this metal initially at 20.0 °C, the final temperature (Tfinal) of the metal is calculated to be 245.52 °C.

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Answer:

Explanation:

Electrical engineers design, develop, and test electrical devices and equipment, including communications systems, power generators, motors and navigation systems, and electrical systems for automobiles and aircraft. They also oversee the manufacture of these devices, systems, and equipment.

Answer:

Electrical engineering duties are to design and conduct research programs; applying knowledge of electricity and materials.

The independent variables are held constant during an experiment. Hence, option (d) is correct.

In mathematical modelling, statistical modelling, and experimental sciences, there are dependent and independent variables.

Dependent variables get their name because, during an experiment, their values are examined under the assumption or requirement that they are dependent on the values of other variables due to some law or rule (for example, a mathematical function).

In the context of the experiment under consideration, independent variables are those that are not perceived as dependent on any other factors.

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Answer:

change in direction

Explanation:

ans maybe correct

Answer:

This temperature is equivalent to 87°C.

.