If three crests pass Pin in one second, the wavelength is?

Answer:

(3rd Question about the Black Widow Pulsar)

J1311 is a fast spinning neutron star, which means it emits strong beams of radiation from it's poles.

As the beam of the pulsar sweeps across the surface of the companion star, it heats it up and blows its material outward into space, thus decreasing its mass.

A parallel circuit is described as a type of circuit in which there are several current paths.

A parallel circuit is a type of electrical circuit where two or more components are connected in parallel, and each component has its path for electric current flow. The path is separate from all other parts, and each has the same voltage level. The current divides among each path according to the resistance value of the components in the circuit. Parallel circuits are used in various applications, including lighting in households, street lights, and other electronic devices. In a parallel circuit, the voltage across each component is the same, and the total current in the circuit is equal to the sum of the current flowing in each branch.

A parallel circuit is used in the household and other applications to prevent other electrical devices from overloading and cutting off electrical supply, for example, when several devices are plugged into a power source. In a parallel circuit, the voltage divider circuit can be used to divide the voltage among resistors. This is because the voltage across each component in a parallel circuit is the same, and we can use the equation V = IR to calculate the voltage divider.

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Answer:

Frictional force increases with the increase in the roughness of the surface.

Explanation:

You will see that the rougher the surface, the greater the wear and tear.

Answer:

I honestly think both of them are true

Answer:

Heat has shorter wavelengths than visible light.

Explanation:

(I had the same question)

I looked up the first one and it was wrong, and the missing options are incorrect. So It would not be all of the above. So, using process of elimination,  "Heat has shorter wavelengths than visible light" is correct.

I PROMISE this is correct

Answer:

your answer is A

Explanation:

brainliest plzzzz

Answer:

c is the correct answer

The graph points are described below.

What is kinetic energy ?

The movement of an object or a subatomic particle exhibits the kinetic energy, often known as the energy of motion. Every atom and object in motion contains kinetic energy. Kinetic energy is present whenever something moves, such as when a person walks, a baseball soars through the air, a piece of food falls from a table, or a charged particle moves in an electric field.

What is potential energy ?

A sort of energy that can be stored but is reliant on the locations of various system components in relation to one another is known as potential energy. A spring gains potential energy when it is stretched or compressed.

P.E= 1/2Kn²

K.E = 1/2 mv²

since the sum will be always constant

At point A.E. is the maximum displacement and the minimum kinetic energy

At point C displacement is maximum so kinetic energy is maximum

At point, B, D it sum of both since displacement is just half of the maximum

so half of the P.E will be converted to K.E.

Therefore, graph points are described below.

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Answer:

v = 17.68 m/s

Explanation:

Given that,

While standing at a crosswalk, you hear a frequency of 510 Hz from an approaching police car.

After the police car passes, its frequency is 460Hz.

We need to find the speed of the police car.

The formula is as follows :

\(v=\dfrac{v_o(f-f')}{f+f'}\)

Put all the values,

\(v=\dfrac{343(510-460)}{510+460}\\\\=17.68\ m/s\)

So, the speed of the police car is 17.68 m/s.

Answer:

i- testing testing,, 1 2 1 2

Answer:

?

Explanation:

Did it work how you wanted?

The refrigerant is a 100% pure vapour when it reaches its final condition. As a result, m v = m = PV is the mass of vapour in the final state.

Refrigerant 134a is originally present as a two-phase liquid-vapor combination at 10 degrees Celsius in a closed, rigid tank with a volume of 1.5 m3. In its ultimate stage, the refrigerant is heated to a temperature of 50°C and a quality of 100%.

Refrigerant-134a is mixed in saturated liquid and vapour form in a rigid tank at 26 OC. The tank's volume is 2.6 m3, and heat is delivered there until the refrigerant vaporises to saturation at 56%C.

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Insulators can be easily charged by friction as the extra electrons gained CANNOT easily escape. Conductors: materials that allow electrons to flow through them easily. Conductors CANNOT be easily charged by friction as the extra electrons gained can easily escape. When negatively charged rod is put near a metal can

Answer: Explanation:

Blastocyst, a distinctive stage of a mammalian embryo. It is a form of blastula that develops from a berrylike cluster of cells, the morula. A cavity appears in the morula between the cells of the inner cell mass and the enveloping layer.

Answer:

its d

Explanation:

i searched it up

The operational motor in the hair dryer revolves the fan blades or impellers, propelling the air through the appliance to offer an organized air flow for drying tresses.

The electric motor in a hair dryer rotates the fan blades or impellers, bringing in unheated airflow at one end.

A vacuum cleaner evidently replicates a hair dryer since both uses a motor to create an air movement.

In terms of a vacuum cleaner, the motor drives a fan or impeller, thus providing suction to draw dirt and scoff from its near vicinity, while a hair dryer utilises its motor to drive a fan or impeller, making up a stream of heated air to rapidly dry hair. It's evident that these devices have various functions yet their mechanism to manipulate the environment remain close enough to be compared.

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Answer:

d = 27.03 m

Explanation:

Constant Speed Motion

An object travels at constant speed if the ratio of the distance traveled by the time taken is constant.

Expressed in a simple equation, we have:

\(\displaystyle v=\frac{d}{t}\)

Where  

v = Speed of the object

d = Distance traveled

t = Time taken to travel d.

From the equation above, we can solve for d:

d = v . t

It's required to find the distance traveled by someone walking at v=1.7 m/s for t=15.9 s. Substituting in the last equation:

d = 1.7 m/s * 15.9 s

d = 27.03 m

Answer:

Because of the heat that contains of the fire anf it make it boil because of the atmosphere that has form

Answer:

C. Thermal energy from the fire moves to the water in the form of heat.

Explanation:

The frequency of the radar wave is 4.166 Hz.

The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave. The wavelength is the reciprocal of the frequency of the wave.

Wavelength λ = 1/f

A 0.12-meter-long electromagnetic (radar) wave is emitted by a weather station and reflected from a near by thunderstorm.

The radar wave travels double the distance 0.12 m.

λ = 2 x 0.12  = 0.24 m

Then, the frequency of the radar wave is

f= 1 / 0.24

f =4.166 Hz

Thus, the frequency of the radar wave is 4.166 Hz.

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The change in the momentum of the bus is 10600 kg-m/s, if bus of 1600 kg crashes with a SUV of 600 kg.

The mass of the bus, m₁ = 1600 kg

The mass of the SUV, m₂ = 600 kg

Initial velocity of the bus, v₁ = 10 m/s

initial velocity of the SUV, v₂ = 0 (at rest)

Velocity of the bus after collision, v₃ = 3 m/s

Velocity of the SUV after collision, v₄ = 1 m/s

The change in momentum(Δp) is given by,

Δp = (m₁v₁ + m₂v₂) - (m₁v₃ + m₂v₄)

Δp = (1600 × 10 + 600 × 0) - (1600 × 3 + 600 × 1)

Δp = 16000 - 5400

Δp = 10600 kg-m/s

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Answer:

C. Probably not since that system deals mostly with mobility.

Explanation:

Answer:

25

Explanation:

sin(30) = x/50

x = 25

When the current flows up the wire, the magnetic field flows in on the left side of the wire and out on the right side of the wire.

The right-hand rule is a method for determining the direction of the force experienced by a current-carrying conductor in a magnetic field or the direction of the magnetic field created by the conductor.

The direction of the magnetic field created by the current is indicated by the way your fingers curl. This is the statement of the right hand rule as shown in the image.

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Answer:

To the Left

Explanation:

Resource managers should consider constraints such as cost, feasibility, public acceptance and potential impacts on the environment and human health. One solution is storage reservoirs to store and divert stormwater and sewage overflow away from Lake Erie.

Societal, ecological, and technical constraints that resource managers should consider before proposing solutions include factors such as cost, feasibility, public acceptance, and potential impacts on the environment and human health.

One design solution that engineers and scientists developed to prevent contamination of Cleveland's drinking water is the construction of a series of underground tunnels and storage reservoirs to store and divert stormwater and sewage overflow away from Lake Erie.

This solution needed to address both sub-problems equally because it addressed both the problem of sewage overflow and the problem of excessive stormwater runoff, which were contributing to the contamination of the lake.

Additional solutions that could be implemented to address the ecological phenomena causing water contamination in Lake Erie include:

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Answer:

electrical- mechanical

Explanation:

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The most likely source of error would be human error such as delay in stopping the stopwatch. The coordination error would be the source of error.

On Earth, the speed of sound as calculated experimentally at sea level assuming a default air temperature of 59 degrees Fahrenheit (15 degrees Celsius) is 761.2 mph (1,225 km/h). The speed of sound is slowed down because gas molecules move more slowly at lower temperatures.

Thus, sound tends to move faster in warmer air.

To explain what speed of sound is, the speed of sound can be described as the distance travelled per unit of time by any sound wave as it propagates through a completely elastic medium.

At 20 °C, temperature the speed of sound in air is about 343 meters per second, or one kilometer in 2.91 s or one mile in 4.69 s.

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The speed of the proton can be calculated as:v = p/m = (1.08 × 10⁻¹⁸ kg m/s)/(1.67 × 10⁻²⁷ kg) = 6.46 × 10⁸ m/s. So, the speed of the proton at 10 MeV is 6.46 × 10⁸ m/s.

Relationship between energy in joules versus eV. The relationship between energy in joules and electron volts (eV) is defined by the conversion factor 1 eV = 1.6 × 10⁻¹⁹ joules. This factor is used to convert energy measurements from one unit to the other. If a proton has an energy of 10 MeV, we can use this conversion factor to determine its energy in joules.10 MeV = 10 × 10⁶ eV = 1.6 × 10⁻¹⁹ J/eV × 10 × 10⁶ eV = 1.6 × 10⁻¹³ J. Speed of a proton at 10 MeV.

The speed of a proton at 10 MeV can be calculated using the relativistic equation: E² = (mc²)² + (pc)², where E is the energy of the proton, m is its mass, c is the speed of light, and p is the momentum of the proton. Let's assume that the mass of the proton is 1.67 × 10⁻²⁷ kg. Then, the momentum of the proton can be calculated as follows:p = √(E² - (mc²)²)/c = √((10 × 10⁶ eV)² - (1.67 × 10⁻²⁷ kg × (2.998 × 10⁸ m/s)²)²)/2.998 × 10⁸ m/s = 1.08 × 10⁻¹⁸ kg m/s. The speed of the proton can be calculated as:v = p/m = (1.08 × 10⁻¹⁸ kg m/s)/(1.67 × 10⁻²⁷ kg) = 6.46 × 10⁸ m/s. Therefore, the answer is 10 MeV is 6.46 × 10⁸ m/s.

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This question involves the concepts of average speed, distance, and time.

The average speed of the family is "2.5 mi/hr".

The average speed is defined as the ratio of the total distance covered with the total time taken to cover it.

\(v=\frac{s}{t}\)

where,

Therefore,

\(v=\frac{2.5\ mi}{1\ hr}\)

v = 2.5 mi/hr

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The density of impact craters on a moon's surface is generally proportional to the age of the moon. So, the older the moon is, the denser the impact craters will be. Here's how the moons rank in terms of the density of impact craters you would expect to observe on the surface are  Callisto,  Ganymede,  Titan and Io.

Ranking the moons in terms of the density of impact craters you would expect to observe on the surface, from highest to lowest:

a. Callisto, a moon that probably has never been active - Callisto is believed to have a heavily cratered surface with minimal geological activity. Since it has likely never been geologically active, the impact craters would accumulate over time, resulting in a high density of impact craters.

d. Ganymede, a formerly active moon - Ganymede is thought to have been active in the past but is now considered geologically inactive. Although it may have undergone resurfacing and some modification of its impact craters, the overall density of impact craters on Ganymede's surface would still be relatively high.

b. Titan, a possibly active moon - Titan is considered to be possibly active, with ongoing processes such as cryovolcanism and erosion. These active processes can modify the surface and potentially decrease the density of impact craters compared to Callisto and Ganymede.

c. Io, a definitely active moon - Io is known to be highly geologically active, with intense volcanic activity and constant surface changes. The active processes on Io, including volcanic eruptions and tectonic activity, would erase or modify the impact craters, resulting in a lower density of impact craters compared to the other moons.

So, the ranking from highest to lowest density of impact craters would be: a. Callisto, d. Ganymede, b. Titan, c. Io.

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To calculate the maximum speed of the Bugatti Veyron, we can use the equation $F_d = \frac{1}{2} \rho v^2 c A$,

which relates the drag force $F_d$ acting on an object to the density of the fluid $\rho$, the speed $v$ of the object, the drag coefficient $c$, and the cross-sectional area $A$ of the object.

In this case, we are given the mass of the car, the drag coefficient, and the force that the engine can impart on the road, so we can solve for the maximum speed.

First, we need to convert the mass of the car to its weight, which is the force of gravity acting on the car. The weight of the car is given by the equation $W = mg$, where $m$ is the mass of the car and $g$ is the acceleration due to gravity.

We can convert the mass of the car from kilograms to newtons by multiplying it by $g$, which is approximately 9.8 m/s$^2$. This gives us a weight of $W = 1834 \text{ kg} \times 9.8 \text{ m/s}^2 = 17983.2 \text{ N}$.

Next, we need to calculate the cross-sectional area of the car. Since we are given the shape of the car and the drag coefficient, we can assume that the car has a streamlined shape with a length $L$ that is much greater than its width or height.

In this case, the cross-sectional area of the car is approximately equal to its width $w$ times its height $h$, or $A \approx wh$. If we assume that the width of the car is $w = 1.8$ meters and the height is $h = 1.2$ meters, then the cross-sectional area is $A \approx 2.16 \text{ m}^2$.

Now that we have all of the required information, we can solve for the maximum speed of the car. The maximum speed is achieved when the drag force acting on the car is equal to the force that the engine can impart on the road. This means that the maximum speed $v_\text{max}$ is given by the equation

$$F_d = \frac{1}{2} \rho v_\text{max}^2 c A = F_\text{engine}$$

where $\rho$ is the density of the air, $c$ is the drag coefficient, $A$ is the cross-sectional area of the car, and $F_\text{engine}$ is the maximum force that the engine can impart on the road.

We are given that the drag coefficient is 0.342 kg/m and the maximum force that the engine can impart on the road is 4522 N. The density of the air is approximately 1.225 kg/m$^3$ at sea level. Plugging these values into the equation, we get

$$\frac{1}{2} \times 1.225 \text{ kg/m}^3 \times v_\text{max}^2 \times 0.342 \text{ kg/m} \times 2.16 \text{ m}^2 = 4522 \text{ N}$$

Solving for the maximum speed, we get $v_\text{max} \approx 242.5$ m/s. This is the maximum speed of the Bugatti Veyron if we neglect all other sources of friction and assume that the car has a streamlined.

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If a race car travels at 33m/s slows at a constant rate to a velocity of 22 m/s over 112s, then distance travel by the race car is 3361.1 m.

From Newton's first equation of motion

a = (v-u) /t

Given,

Initial velocity = u =  33m/s

Final velocity = v = 22m/s

Time = t = 112s.

Now,

a = (v-u) /t

a = (22-33) / 112

a = -11/112

a = - 0.09m/s²

This can be calculated by using second law of equation or by the third law of equation.

From third equation of motion,

v² − u² = 2as

484 - 1089= 2(0.09) s

605 = 0.18 s

s = 3361.1m.

Thus, we calculated that if a race car travels at 33m/s slows at a constant rate to a velocity of 22 m/s over 112s, then distance travel by the race car is 3361.1 m.

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