In 1935, a french destroyer , La Terrible , started from rest and accelerates to attain a speed of 93 km/h. Suppose it took 2 minutes for the ship to speed up. Find the ships average acceleration.

The properties of stars are:  mass, age, distance, metallicity (chemical composition), variability and motion through space.

An astronomical object known as a star is made up of a bright plasma spheroid that is held together by gravity. The Sun is the star that is closest to Earth.

Other stars are also visible at night with the unaided eye, but because to their great distances from Earth, they appear as stationary points of light. Many of the brightest stars have names, and the most notable stars have been grouped into constellations and asterisms.

Star catalogues have been put out by astronomers that list the known stars and offer standardized stellar labels.

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Answer: Stars produce energy through nuclear fusion.

Stars are massive objects composed of gas.

Stars are composed primarily of hydrogen and helium.

P.S can I get the brainiest?

Put your finger over P to compute power; this leaves I and V; hence, P = I x V.

The quantity of current multiplied by the resistance equals the potential difference, which is the same as voltage. One Coulomb of charge uses one Joule of energy to move between two locations in a circuit, which is equal to a potential difference of one Volt.

Difference that might exist at all between the two points The amount of work required to move a unit positive charge along any path through one point to another without accelerating is referred to as the electric field.

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Graphite: according to table 1, which of the following materials is the poorest electrical conductor.

What is conductor?

Conductor is an electrical device or material that is capable of allowing electric current to flow through it. It is used in a variety of applications ranging from wiring in buildings to the transmission of electricity over large distances.

Conductors are typically made from metals, such as copper and aluminum, but certain types of materials, such as semiconductors, can also act as conductors.

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She moves at 6.5 m/s as her final speed after running 100 meters.

The velocity change of an object per unit of time is known as acceleration. Amounts of acceleration are measured in meters per second squared (m/s2), the SI unit of acceleration. For instance, due to Earth's gravity, a falling object accelerates at a rate of 9.8 m/s2.

A straight-line motion issue looks something like this. These formulas are used to determine the final velocity:

s = Vo*t + (1/2)*a*at2, and Vf = Vo + at

Where:

Vf = = final speed =?

1.4 m/s is the initial velocity, and 0.20 m/s is the acceleration.

100m displacement in 2 seconds.

the first equation is changed by:

100 = 1.4t + (1/2)*0.2*t^2\st = 25.388s

Vf = 1.4 + 0.2 can be used as a replacement in the second equation.

Vf = 6.5m/s

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Explanation:

Electrostatic is a force between two non-conductors

while

Friction oppose the relative motion between two surface or object.

The amount of torque produced if the angle between the force and the lever arm is zero is zero.

The formula for torque is:

Torque (τ) = Force (F) x Lever arm (r) x sin(θ)

This is because torque is defined as the product of force and the perpendicular distance from the line of action of the force to the axis of rotation. When the angle between the force and the lever arm is zero, the force is acting parallel to the lever arm, meaning that there is no perpendicular distance between the force and the axis of rotation, resulting in a torque of zero. In other words, the torque is zero when the force is applied in the same direction as the lever arm.

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Answer:

  A.  35 °C

Explanation:

You want to know which of the temperatures 5, 10, 15, or 35 °C is most favorable to mosquito breeding.

Mosquitos are nonfunctional below 50 °F (10 °C), and are lethargic at 60 °F (15.6 °C). They prefer 29 °C, and their breeding falls off at higher and lower temperatures.

Of the temperature choices offered, mosquitos would breed fastest at 35 °C.

The range of wavelength when m = 3 is λ = 8.20 x 10-7 m to 18.7 x 10-7 m (this belongs to infrared radiations).

The wavenumber of hydrogen spectral series is 1/λ = R(1/m2 – 1/n2)

Rydberg constant, R = 1.097 x 107 m-1

1. When m = 1 and n = 2, 1/λ = 1.097 x 107 x (1/12 – ½2) = 0.822 x 107

Wavelength, λ = 1.215 x 10-7 m

When m = 1 and n = ∞

, 1/λ = 1.097 x 107 x (1/12 – 0) = 1.097 x 107

Wavelength, λ = 0.911 x 10-7 m

The range of wavelength when m = 1 is λ = 0.911 x 10-7 m to 1.215 x 10-7 m (this belongs to ultra-violet radiations)

2. When m = 3 and n = 4, 1/λ = 1.097 x 107 x (1/32 – 42) = 0.0533 x 107

Wavelength, λ = 18.7 x 10-7 m

When m = 3 and n = ∞

1/λ = 1.097 x 107 x (1/32 – 0) = 0.122 x 107

Wavelength, λ = 8.20 x 10-7 m

The range of wavelength when m = 3 is λ = 8.20 x 10-7 m to 18.7 x 10-7 m (this belongs to infra-red radiations)

In physics, the wavelength is the spatial duration of a periodic wave—the distance over which the wave's shape repeats. it is the gap between consecutive corresponding points of the same section on the wave, including two adjoining crests, troughs, or 0 crossings, and is a feature of each traveling wave and standing wave, as well as other spatial wave patterns. The inverse of the wavelength is known as the spatial frequency. Wavelength is normally exact by means of the Greek letter lambda (λ). The time period wavelength is also now and again implemented to modulated waves, and to the sinusoidal envelopes of modulated waves or waves fashioned with the aid of interference of several sinusoids.

Assuming a sinusoidal wave shifting at a set wave speed, the wavelength is inversely proportional to the frequency of the wave: waves with better frequencies have shorter wavelengths, and decreased frequencies have longer wavelengths.

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The gravitational force between Jupiter and its natural satellite Callisto is 3.76×10∧21 Newton.

The attraction force that exists in between two masses is directly proportional to the product of their mass and is inversely related to the square of the distance between them, according to Newton's universal law of gravitation.

The mass of Jupiter is 1.99 x 10^27 kg

the mass of Callisto is 1.08 x 10^23 kg

By using the formula

F = G M1×M2/ r²

(G = 6.67×10∧-11 )

F = ( 6.67×10∧-11 ×1.99 x 10^27 × 1.08 x 10^23 ) / (1.88 x 10^9)²

F = (13.28×10∧39)/3.534×10∧18

F =3.76×10∧21 Newton.

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According to the given statement The temperature of the air in this experiment is dependent variable.

Material refers to a thing that something else is made out of. Material can also refer to cloth or can be used to describe something that is made of matter and exists in the physical world. Material has many other senses as a noun and an adjective.

A material is any substance that an object is made from. Glass, chalk, paper, wax, water, air, clay and plastic are all different materials. All materials are made up of matter.

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Answer:

C. -35N/m

Explanation:

Using Hooke's Law, we know that the elastic constant of a spring can be found with this formula:
[tex]F=-kx[/tex]

where:

[tex]F[/tex] is the force ( in Newtons)
[tex]k[/tex] is the constant ( in Newtons per meter)
[tex]x[/tex] is the extension ( in meters)

thus, by rearranging the formula we can get:
[tex]k=-\frac{F}{x}[/tex]

[tex]k = -\frac{10}{0.286}[/tex]

[tex]k=-34.96503N/m[/tex]

Rounding off the answer, we get -35N/m

If the net force on the cart is 66.0 N, the acceleration of the cart is 1.46 m/[tex]s^{2}[/tex] .

The formula used in the second law of motion to explain the connections between force, mass, and acceleration is Mass + acceleration equals force. F = ma Calculating force in Newtons (N), mass in kilograms (kg), and acceleration in meters per second squared (m/s2) may all be done using this formula.

It is show that,

Mass of cart, m = 45 kg

Net force acting on cart, F = 66 N

Let a represent the rate of acceleration of the cart being pushed. Using Newton's second rule of motion, it can be calculated as follows:

F = ma

a = F/m

a = 66 N/45 Kg

a = 1.46 m/[tex]s^{2}[/tex]

So, the acceleration of cart is  = 1.46 m/[tex]s^{2}[/tex] .

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To determine the value of C, we can use the equation provided: V(x) = Cx^4/3, where x is the distance from the cathode. V(x) = C(13.6 mm)^4/3 = 264V. So, C = 264V / (13.6mm)^4/3

To obtain a formula for the electric field between the electrodes as a function of x, we can use the equation: Ex = -dV/dx

Substituting the equation for V(x) and the value of C obtained in part (a) into the equation:

Ex = -dV/dx = -(d/dx)(Cx^4/3) = -(4/3)Cx^(4/3)

To determine the force on an electron when the electron is halfway between the electrodes, we can use the equation: F = qE

where q is the charge of the electron and E is the electric field at that point. Since the force on an electron is equal to the electric field multiplied by the charge of the electron, we can substitute the value of E obtained in part (b) and the charge of the electron, 1.6 x 10^-19 C, into the equation

F = qE = (1.6 x 10^-19 C) * (-(4/3)C

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Answer:

a = v2/r, for an object moving with a constant speed, v, around a circle of radius, r. We will also verify that the direction of the acceleration vector is toward the center of the circle.

substitute your numbers into the formula

5.0 = v2/45.0

then cross multiply to get your final answer

The mass of the bouquet can be calculated using the equation m = F/a. Which is equal to 0.9kg.

Since van Gennip’s speed dropped from 10.8 m/s to 10.01 m/s after she took the bouquet, this indicates that a force was applied to her causing her to slow down.

The applied force can be determined by taking the difference between her final and initial momentum, which is p = mv.

Thus, the applied force can be calculated by F = Δp/Δt.

Plugging in the given values, the mass of the bouquet can be calculated as

m = F/a = (63.0 kg × (10.8 m/s - 10.01 m/s))/10.01 m/s² = 0.9 kg.

Therefore, the mass of the bouquet is 0.9 kg.

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The student with a 59-kg mass moves to the right with a velocity of 1.46 m/s.

According to the law of conservation of momentum, The overall momentum of two or more bodies acting on one another in an isolated system stays constant unless an external force is introduced.

The student with a mass of 48 kg moves to the left with a velocity of 1.8 m/s.

Let the student with a mass of 59 kg moves to the left with a velocity of v m/s.

As no external force applied,

48 kg × 1.8 m/s + 59 kg × v = 0

v = - 1.8 × (48/59) m/s

= - 1.46 m/s.

Hence, the velocity of the second bay is 1.46 m/s in right direct.

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The maximum possible thermal efficiency of the system is d. 67.9%.

By utilizing the physics of heat engines and Second Law of Thermodynamics, we can calculate that the maximum achievable efficiency of a heat engine with a hot reservoir at 515 k and a cold reservoir at 190 k is 67.9%.

This result serves as an upper limit for all practical engines, regardless of the specifics of their design or engineering capabilities.

Making this maximum efficiency is possible through improvements in technology and increased knowledge on thermodynamics and energy production.

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Answer: A.

63.1%

Explanation: edmentum

A lengthy string is simple to stretch. The string's two designated spots, A and B, should be at an angle of 90 degrees with the same magnitude, and B should be at an angle of 270 degrees with the same magnitude.

Angle magnitude definition

This is referred to as the amount of rotation that is believed to have been applied to one of the arms' vertex in order to produce a specific position for the other.

It is well known that equal vectors have the same magnitude and direction. When the magnitude and direction of two vectors are the same, they are said to be equal.

|v|=a2+b2 yields the magnitude. Depending on the application, the direction is equal to the angle made with the x-axis or the y-axis.

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The acceleration of the airboat which has a mass of 350 kg is 2.2 m/s²

The time the airboat takes to reach the speed of 12 m/s is 5.45 seconds

The mass of the airboat = 350 kg

The net horizontal force of the airboat = 770 N

The acceleration of the airboat can be found using the formula,

         F = ma

where F is the force

           m is the mass

           a is the acceleration

Let us rearrange the above equation, we get

          a = F/m

Let us substitute the known values in the above equation, we get

           a = 770 / 350

              = 2.2 m/s²

The time taken to reach the speed of 12 m/s is

               a = v/t

where a is the acceleration

           v is the velocity

           t is the time taken

Let us rearrange the equation, we get

          t = v/a

Let us substitute the known values in the above equation, we get

          t = 12 / 2.2

           = 5.45 seconds

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Swallow the soil it moves and Break the soil into smaller particles.

They don't have bones or other fixed features that might restrict their movement. The body of an earthworm is segmented. Earthworms use the setae, or tiny bristles, that are present on each segment, to assist them hold the dirt as they travel.

An earthworm uses two distinct sets of muscles to move. Longitudinal muscles run the length of the body, while circular muscles loop around each segment. The earthworm extends as a result of the circular muscles contracting, growing longer and thinner.

The earthworm embeds the front of its body in the dirt using its setae. The earthworm now contracts its longitudinal muscles, either making it shorter and wider.

Therefore, Swallow the soil it moves and Break the soil into smaller particles.

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In the crash 5883 Joule kinetic energy is discinated when two of these cars are used in a stunt crash for an action film.

Final kinetic energy (KE) is equal to 1/2 m1v'12 + 1/2 m2v'22 , or joules. The end kinetic energy for common things will be lower than the starting point. The only way you can increase kinetic energy is if the impact causes an energy release of some type.

As a result, the kinetic energy equation states that it is equal to 1/2 the object's mass times the magnitude of its velocity squared, or speed squared.

Initial kinetic energy KE,

[tex]KE=1/2 m_1v_1^2 + 1/2 m_2v_2^2[/tex]

[tex]KE=1/2 (111)(9.00)^2 + 1/2 (111)(5.00)^2[/tex]

[tex]KE= 4495.5+1387.5[/tex]

[tex]KE= 5883J[/tex]

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the following blanks are gravitational potential energy and kinetic energy

Gravitational potential energy is the energy that an object has due to its position in a gravitational field.It is given by the equation Ep = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object above a reference point. Kinetic energy is the energy an object possesses by virtue of its motion. It is given by the equation Ek = 1/2mv^2, where m is the mass of the object and v is its velocity.

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Jessica's linear speed is faster.

We must first define linear speed in order to respond to the query.

This is the tangential speed of an item moving in a circle. Given by the formula v = r,

r is the object's distance from the circle's center, and is its angular speed.

Given that Julie, Jessica's sister, is riding an inner horse that is placed 6.0 meters from the center of the merry-go-round and Jessica is riding an outside horse that is 8.0 meters away from the center of the ride. The merry-go-round is also rotating at a consistent speed.

Given that v = r and = constant for linear motion,

So, v ∝ r.

Therefore, the girl who was farther away from the merry-go-center round's would move at a faster linear rate.

Since

Julie is at r, and Jessica is at r' = 8.0 m "= 6.0 m.

Since

r' = 8.0 m > r and v r "= 6.0 m,

Jessica's thus has a faster linear speed.

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The speed with which the cart and bag move after the collision is equal to 2.14 m/s.

Given the following data:

   Mass of bag = 9.0 kg

   Speed of bag = 6.7 m/s

   Mass of cart = 19.1 kg

  Speed of cart = 0 m/s (since it is initially at rest or stationary).

To calculate the final speed with which the cart and bag move after the collision:

Applying the law of conservation of momentum, the collision between the cart and bag is given by the formula:

Where:

M is the mass.

V is the velocity.

Substituting the given parameters into the formula, we have;

9.0 × 6.7 + 19.1 × 0 = Vf  (9+19.1)

60.3 =  vf (28.1)

vf = 60.3/28.1

vf = 2.14 m / s

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The frequency of the cart's motion for a distance of 10.0 meters is 0.075 Hz (Hertz), which means the cart completes 0.0775 round trips per second.

1) Period (T):

The period (T) is the time taken for one complete round trip. The cart travels from one end to the other and back in one round trip.

T =  (distance/speed)

T = (10.0 / 0.75 )

T = 13.33 seconds

So, the period of the cart's motion for a distance of 10.0 meters is approximately 13.33 seconds.

2) Frequency (f):

The frequency (f) is the number of complete round trips per unit time. It is the reciprocal of the period.

f = 1 / T

f = 1 / 13.33

f =  0.075 Hz

So, the frequency of the cart's motion for a distance of 10.0 meters is approximately 0.075 Hz (Hertz), which means the cart completes approximately 0.0775 round trips per second.

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The heat transfer theory attempts to anticipate the energy transfer that may occur between material bodies as a result of temperature differential. Conduction, convection, and radiation are the three processes through which heat may be moved from one location to another.

Heat transfer is a thermal engineering subject that deals with the creation, consumption, conversion, and exchange of thermal energy (heat) across physical systems.

Heat transmission techniques include thermal conduction, thermal convection, thermal radiation, and energy transfer via phase shifts. To achieve heat transfer, engineers also address the transfer of mass of different chemical species (mass transfer in the form of advection), either cold or hot. While these processes have separate properties, they frequently occur in the same system at the same time.

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In the United States, there were 3,494 radio broadcasting stations in 2009. Radio reaches approximately 68 percent of American customers aged 12 and older on average each day, and 236 million people listen to radio every week, according to records.

Since their beginnings at the turn of the 20th century, radio stations in the United States have changed. Following the establishment of 8MK in Detroit in 1920, thousands of private and public radio stations have operated across the country. There are several different ways to organise the lists of radio stations in the US.

The Federal Communications Commission oversees radio transmission in the US (FCC). Various broadcasting services, including the following, have been produced under the AM broadcast band, which runs from 540 to 1700 kHz, is where radio transmission initially gained popularity in the 1920s.

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