Define surface tension ​

Based on the data provided, the distance travelled is 37.68 m.

First we calculate the angular velocity:

angle turned = 180 degrees = πradians

angular velocity =  πradians/5

angular velocity = 0.628 rad/s

Linear speed = radius * angular velocity

Linear speed = 12 * 0.628

Linear speed = 7.536 m/s

Then:

Distance travelled = 7.536 * 5

Distance travelled = 37.68 m

Therefore, the distance travelled is 37.68 m.

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If a 60 Newton-second impulse is given to an object, the change in momentum  is 60 kg-m/s.

In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton-seconds or kilograms per second and is denoted by the symbol J.

Impulse of force is = force applied × time interval = change in momentum.

Mass of the object is =  10 kg

Applied impulse is = 60 Newton-second.

Hence,  change in momentum is = 60 kg-m/s, if a 60 Newton-second impulse is given to an object,

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Answer:

b

Explanation

Answer: 5.3 ms east

Explanation:

Answer:

I) 420000J

ii)

Explanation:

(I) so you can use the formula for quantity of heat then substitute the values given

formula-Q=mc∆9

Answer:

It's "C"

Explanation:

Friction slows things down.

"Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made. The rougher the surface, the more friction is produced. Friction also produces heat. "

-Google

Answer:

True?

Explanation:Im sure of it?

According to the universal law of gravitation, the force between 2 objects (m1 and m2) is proportional to their plenty and reciprocally proportional to the sq. of the distance (R) between them.

Newton’s Second Law of Motion is defined as Force is equal to the rate of change of momentum. For a constant mass, force equals mass times acceleration.

\(\Delta p = mv - mu \\\\\implies \Delta p = m(v-u) \\\\F = \dfrac{\Delta p}{\Delta t} = \dfrac{m(v-u)}{\Delta t} = ma\)

F = ma is the formula of Newton’s Second Law of Motion.

To prove Newton's second law of motion,

Given Force F = Δp/Δt

Proof for F=ma

     Let us consider an object of mass m, moving along a straight line with an initial velocity u, final velocity v and it has some particular time t and thus Momentum can be related as,

For initial velocity u, p1 = m × u

The final velocity v, p2 = m × v

The change in momentum can be expressed as

p2 – p1 = (m × v) – (m × u)

p2 – p1 = m (v – u)

Here, we know that the rate of change of momentum with respect to time is proportional to the applied force.

The applied force F,

F ∝ [m (v – u)]/t

F ∝ m × a

As acceleration (a) is the rate of change of velocity with respect to time.

F = k × m × a

F = ma

where k can be the constant.

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Answer:

Explanation: I kinda think soo

Answer:

 u = - 40 ft / s

Explanation:

The Galilean relation for the relative velocity is

         v ’= v + u

where u is the speed between the two reference frames, v is the speed of the fixed system and v 'the speed of the mobile system.

In this case the truck has a speed with respect to the ground (fixed system) 0 m / s (it is stopped), the car has a speed with respect to the ground of v = 40 ft / s,

        u = v'- v

        u = 0 - 40

        u = - 40 ft / s

the speed perceived by the car if the system is fixed on it is -40 ft / s

Given that

heat capacity of water = 4200

heat capacity of aluminium = 897

heat capacity of oil = 1900

heat capacity of gold = 129

Heat capacity is the amount of heat a material absorbs to increase its temperature by 1 degree Celsius.

So, larger the heat capacity of a material lower will be the temperature change.

If equal amount of energy is applied to the materials, then gold will have the greatest temperature change as its heat capacity is lowest than other materials.

The time taken for the car to go from rest to 21 m/s is 3.2 seconds.

The acceleration of the car is determined by applying Newton's second law of motion as shown below.

Mathematically, the formula for Newton's second law of motion is given as;

F (net) = ma

where;

The net force acting on the car is calculated as follows;

F (net) = F - Ff

where;

F (net) = 38,900 N - 34,000 N

F (net) = 4,900 N

The acceleration of the car is calculated as follows;

a = F (net) / m

a = ( 4,900 N ) / ( 745 kg )

a = 6.58 m/s²

The time of motion of the car is calculated as follows;

v = u + at

v = 0 + at

v = at

t = v / a

t = ( 21 m/s ) / ( 6.58 m/s² )

t = 3.2 s

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Answer:

6,400

Explanation:

i made sure  the other person was right and i got the same answer

Answer:The continuity equation for a compressible liquid is a mathematical expression that relates the changes in fluid density, velocity, and volume to the changes in time. This equation can be written as:

∂ρ/∂t + (ρv)•∇ = 0

where:

ρ = fluid density

v = fluid velocity

∂/∂t = partial derivative with respect to time

∇ = del operator

The continuity equation expresses the principle of mass conservation, stating that the rate of change of fluid density in a fixed volume must be equal to the rate of flow of fluid into or out of that volume. This equation is commonly used in fluid dynamics to study the behavior of liquids and gases in various applications, such as in pipelines, pumps, valves, and compressors.

Explanation:

In conclusion, the magnitude of the net force parallel to the ramp is m * g * sin(θ), and the magnitude of the acceleration is F / m, where F is the net force parallel to the ramp, m is the mass of the box, g is the acceleration due to gravity, and θ is the angle of the ramp.

When a box of mass m is pushed on a frictionless ramp inclined at an angle θ, the magnitude of the net force parallel to the ramp can be determined using trigonometry. The force acting parallel to the ramp is given by the equation

F = m * g * sin(θ),

where m is the mass of the box, g is the acceleration due to gravity, and θ is the angle of the ramp.
To understand this, let's break it down step-by-step. The weight of the box is given by the equation

W = m * g,

where m is the mass and g is the acceleration due to gravity. This weight can be resolved into two components: one perpendicular to the ramp and one parallel to the ramp. The component parallel to the ramp is

W * sin(θ),

where θ is the angle of the ramp.
Since the box is on a frictionless ramp, there is no friction force acting on it. Therefore, the only force parallel to the ramp is the component of the weight. Thus, the magnitude of the net force parallel to the ramp is

F = m * g * sin(θ).
Moving on to the acceleration, we can use Newton's second law, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the net force parallel to the ramp is

F = m * g * sin(θ).

Therefore, the magnitude of the acceleration is given by the equation a = F / m.
In conclusion, the magnitude of the net force parallel to the ramp is m * g * sin(θ), and the magnitude of the acceleration is F / m, where F is the net force parallel to the ramp, m is the mass of the box, g is the acceleration due to gravity, and θ is the angle of the ramp.

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Answer:

A 220 N

Explanation:

it’s the only one not marked out on the photo. Hope this helps!

Answer:

93km/h

Explanation:

because 31multiplied by 2 Is equal to 2

Answer:

False

true

Hope this helps!

Explanation:

Formula:

F*255.92778=K

83 F *255.92778=301.48k

therefore the answer is:

301.48K

Answer:

The distance traveled by the apply after being released is 127.45 m.

Explanation:

The given parameters;

time of motion of the apple, t = 5.1 s

initial velocity of the apple, u = 0

The distance traveled by the apply is calculated by applying second kinematic equation as shown below.

Assuming downward motion to be positive.

ok oh if i need any answers just asking i'll help you

Answer:

Multiply length value by 1000 equals 2000

Explanation:

converting 2 km to miles is pretty simple, just search up what the value for miles and you will find ur answer :)

Answer:

Electrons move around the nueclues and the proton and neutron is found inside the nucleus

Answer:

Electron

Electron is one of the sub-atomic particle that revolves around the nucleus.

They are present in orbits which are just like the orbits of planets in the solar system which are the paths of revolution.

Answer:

T = 51.25°C

Explanation:

Applying the law of conservation of energy, we get:

where,

m₁ = mass of cold water = 175 g

m₂ = mass of hot water = 125 g

T = Final temperature of the mixture = ?

Therefore,

\((175\ g)(T-20^oC) = (125\ g)(95^oC-T)\\\\T-20^oC = (0.7143)(95^oC-T)\\\\T(1+0.7143) = 20^oC+67.86^oC\\\\T = \frac{87.86^oC}{1.7143}\)

T = 51.25°C

Option A. An electromagnetic wave at very long wavelength (low frequency) best describes a radio wave.

A radio wave is best described as an electromagnetic wave at a very long wavelength or low frequency. It is not a pressure wave. Radio waves are a type of electromagnetic radiation, which also includes other forms such as visible light, infrared, and X-rays. The term "wavelength" refers to the distance between two consecutive points in a wave, such as from one crest to the next. In the case of radio waves, the wavelength is quite long, ranging from several millimeters to hundreds of meters. This long wavelength allows radio waves to travel long distances and pass through obstacles such as buildings and trees. Radio waves are used for various purposes, including communication, broadcasting, and radar systems. For example, when you listen to the radio, the sound is encoded onto a carrier wave, which is a specific radio wave frequency. The receiver then extracts the sound from the carrier wave, allowing you to hear it. Similarly, radar systems use radio waves to detect and track objects like airplanes or weather patterns. To summarize, a radio wave is an electromagnetic wave at a very long wavelength or low frequency. It is not a pressure wave. Radio waves are used for communication, broadcasting, and radar systems due to their ability to travel long distances and pass through obstacles. They play a crucial role in everyday life, allowing us to enjoy wireless communication and entertainment.

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Answer: The temperature range will be \(96.1^0C\) in summer to \(1.67^0C\) in winter. The temperature range will be \(369.1K\) in summer to \(274.67K\) in winter.

Explanation:

The temperature conversion from fahrenheit to degree Celcius is as follows:

\(^0C=\frac{5}{9}\times (F-32)\)

Thus \(205^0F\) will be :

\(\frac{5}{9}\times (205-32)=96.1^0C\)

Thus \(35^0F\) will be :

\(\frac{5}{9}\times (35-32)=1.67^0C\)

The temperature conversion from degree Celcius to Kelvin is as follows:

\(K=^0C+273\)

Thus \(205^0F\) will be :

\(96.1+273=369.1K\)

Thus \(35^0F\) will be :

\(1.67+273=274.67K\)

Answer:

larger

Explanation:

just trust me

The smaller the mass of an object, the smaller its inertia, because the inertia of any object is directly proportional to the mass of the object

The ability of an object to resist changes in motion is known as inertia. The amount of inertia is directly related to an object's mass; in fact, as we frequently observe, the heavier an object is, the harder it is to change its direction of motion.

A straightforward illustration: While it is relatively simple to stop a tennis ball that has been thrown in our direction, we are aware that it is more difficult to stop a large truck that is moving in the same direction at the same speed. This is because the truck has a much higher mass than the tennis ball and a higher moment of inertia. As a result, inertia rises as mass does.

Since the inertia of any object is directly proportional to its mass, the smaller its mass, the less inertia it will have.

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The efficiency of the Carnot engine is calculated by the formula efficiency, η = 1 - (T₂ / T₁). The efficiency of the Carnot engine η = 30% with low-temperature T₁= 320 k and high-temperature T₂ = 457K.

The Carnot engine is a theoretical model of the thermodynamic cycle proposed by Leonard Carnot. Carnot's theorem states that an engine works between a hot and cold reservoir can have more efficiency than an engine that works between the same reservoirs. The efficiency of Carnot's engine is, η = 1 ₋ (T₂ /T₁ ), T₂ represents high temperature and T₁ represents low temperature. η represents efficiency.

From the given,

η = 1 ₋ (T₂ /T₁ )

T₁ = T₂ / (1 ₋η) = 320 / (1₋0.30)

T₁ = 427 K.

Thus, T₁ is 427K and T₂ is 320 K giving an efficiency of 30%.

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Before the child begins any outward radial movement, the angular momentum of the system of child and turntable is zero.

What is the angular momentum of the child-turntable system before any outward radial movement?

The conservation of angular momentum concept can be used to determine the angular momentum of the child and turntable system before the child begins any outward radial movement.

Assuming the turntable is initially at rest and the child is sitting at a distance R from the axis of rotation of the turntable, the angular momentum of the system is given by:

L = Iω

where L denotes angular momentum, I denotes moment of inertia, and denotes angular velocity.

Since the child is treated as a point mass, its moment of inertia can be approximated as:

Ichild = mchild × R^2

Since the turntable is initially at rest, its initial angular velocity is zero:

ωinitial = 0

As a result, the system's initial angular momentum is:

Linitial = Ichild × ωinitial = 0

As a result, the angular momentum of the child-turntable system is zero before the child begins any outward radial movement.

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The part of electromagnetic spectrum lying between the ultraviolet region and the gamma ray region is x-rays.

The smallest known wavelengths and greatest frequency are found in gamma rays. They are the most piercing waves because they have high energy and can travel great lengths through air. X-rays have shorter wavelengths than UV radiation, but longer wavelengths than gamma radiation, making them more energetic.

The electromagnetic energy known as ultraviolet has a frequency of 30 PHz to 750 THz and a wavelength of 10 nm to 400 nm. These particles have wavelengths that are both shorter than visible light and longer than X-rays.

Thus, the x-ray area of the electromagnetic spectrum is located between the ultraviolet and gamma ray regions.

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The symbols that completes the given nuclear equation are written as follows:

An alpha decay can be defined as a type of radioactive decay in which the atomic nucleus of a radioactive element emits an alpha particle, thereby, producing chemical elements with a different atomic nucleus.

During an alpha decay, the radioactive element has a mass number that is decreased by four (4) and an atomic number that is decreased by two (2), which is typically an atom of Helium (⁴He₂).

A beta particle can be defined as an isotope which typically undergoes radioactive decay through the emission of a radiation with a -1 charge. This ultimately implies that, an atom of neutron becomes a proton and an electron (₀e⁻¹) and an atom of proton also becomes a neutron and a positron (⁰⁻e₁⁺) during beta decay.

In conclusion, the symbols that completes the given nuclear equation are written as follows:

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B 10,000 - 30,000 K Blue-white stars

A 7,500 - 10,000 K White stars

F 6,000 - 7,500 K Yellow-white stars

G 5,000 - 6,000 K Yellow stars (like the Sun)

The lowest temperature stars are red while the hottest stars are blue. Astronomers are able to measure the temperatures of the surfaces of stars by comparing their spectra to the spectrum of a black body.