i. neutrinos are very abundant in the universe (our sun for example produces them in huge amounts as as by-product of nuclear fusion). a recent discovery has given them a (tiny) amount of mass. discuss how this would/could change our view of whether the expansion of the universe is slowing or not. (hint: think about gravity and potential energy due to gravity) ii. disuss why our sun has a stable (constant) radius. what supports it against gravitational collapse? iii. disuss why a neutron star has a stable (constant) radius. what supports it against gravitational collapse?

Angular velocity of the microwave in radians per second = 0.6492 rad/s

The rate at which something rotates or revolves around an axis is known as its angular velocity. The Greek letter omega (ω) stands for angular velocity. Because it is expressed as an angle per unit of time, angular velocity in the SI is measured in radians per second.

According to the given information

We need to find the Angular velocity of the microwave in radians per second

For that ,Firstly we will find the frequency

Microwave rotate at the rate of = 6.2 rev/min

                                                    = 6.2/60 rev/s

                                                    = 0.10333 rev/s

Now , we know that

Angular velocity = 2[tex]\pi[/tex]f

                      ω  = 2×3.14×0.10333

                      ω = 0.6492 rad/s

Angular velocity of the microwave in radians per second = 0.6492 rad/s

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Answer:

9.8 m/ssr=2322

Explanation:

Work done to accelerate from rest to speed of 8 m/s = 2496 Joules

According to the work-energy theorem, the net work performed by forces acting on an item equals the change in kinetic energy.

According to the given information

Using the work - energy theorem,

work done is defined as the change in the kinetic energy  [tex]$\mathrm{W}=\frac{1}{2} \mathrm{mv}^2-\frac{1}{2} \mathrm{mu}^2[/tex]= [tex]\frac{1}{2} \mathrm{~m}\left(\mathrm{v}^2-\mathrm{u}^2\right)$[/tex]

given

[tex]$\mathrm{m}[/tex] =78 [tex]\mathrm{~kg}$[/tex]

[tex]$u=0 \mathrm{~m} / \mathrm{s}$[/tex]

[tex]$v=8 \mathrm{~m} / \mathrm{s}[/tex]

Hence

[tex]$\mathrm{W}=\frac{1}{2} 78\left(8^2-0^2\right)$[/tex]

[tex]$\Rightarrow \mathrm{W}=\frac{1}{2}(78)(64)$[/tex]

[tex]$\Rightarrow \mathrm{W}=2496 \mathrm{~J}$[/tex]

Work done to accelerate from rest to speed of 8 m/s = 2496 Joules

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Astronomers use space telescopes to determine the effects of collisions between galaxies.

A space telescope could be a telescope in outer space utilized to watch astronomical objects. Space telescopes avoid the sifting and distortion of electromagnetic radiation which they observe, and maintain a strategic distance from light pollution which ground-based observatories experience. They are divided into two sorts, such as Satellites which outline the entire sky, and satellites which center on selected galactic objects or parts of the sky and beyond. Astronomy deals with the study of external space. The study centers on planets and other celestial bodies. For the most part, telescopes are utilized to study external space.

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which tools do? select the two correct answers. (1 point)

computer simulations

print encyclopedia entries

space telescopes

solar system models

Maximum distance that it moves down is 26 cm, when block hangs at rest with the spring stretched by 13.0 cm.

In the formula, F = -k x :  k is called the spring constant and is a measure of the spring's stiffness. When a spring is stretched or compressed,  its length changes by an amount x from  equilibrium length, and then it exerts a force F = -kx in a direction towards the equilibrium position.

Given that the equilibrium position is 13 cm below the starting point. As motion is symmetric about the equilibrium position, so the two turning points are 26 cm apart.

13 *2 = 26cm

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a) Force exerted on the block by the arm is  4N.

b)  The relative acceleration of the block with respect to the arm is  10rad/s2.

(a) The force exerted on the block B by the arm OA is given by:

F = m × a = 0.5 kg × (10 rad/s2) × 0.8 m = 4 N

The force exerted on the block by the arm is equal to the product of the mass of the block and the relative acceleration of the block with respect to the arm. Since the velocity of the block is zero at the given instant, the relative acceleration of the block with respect to the arm is equal to the angular acceleration of the arm, i.e., 10rad/s2. Hence, the force exerted on the block by the arm is  

                               0.5kg×10rad/s2 =5N.

(b) The relative acceleration of the block with respect to the arm is given by:

a_rel = a + θ2 × r = 10 rad/s2 + (45 rad/s2)2 × 0.8 m = 15.6 m/s2

The relative acceleration of the block with respect to the arm is equal to the angular acceleration of the arm, i.e., 10rad/s2.

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In the series of a flashlight's barrel, the fraction of the chemical energy transformed appears as internal energy in the batteries as 0.460.

b) the expression for the total emf for the given circuit is

E = nV

E = total emf for the circuit

n = number of batteries

V = voltage across the batteries

Substitute 2 for n, 1.50V for V in the above equation to find E

E = 2 x 1.500V

= 3.0V

Total emf = 3.0V

By using the formula to calculate total internal resistance for the circuit

r = r1+r2

r = total circuit's resistance

r1 = one battery's internal resistance

r2 = internal resistance of other battery

Substitute 0.350 for r1 and 0.110 for r2 in the above formula then,

r = 0.350+0.110

= 0.460

Hence, the total internal resistance for the circuit is 0.408

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The binding energy per nucleon of 235-U and 137-Cs is given below:

The binding energy of a nucleus is given by the following equation:

where;

BE is binding energy

Δm is mass defect

c is the speed of light = 931.49 MeV/u

For 235U:

A = 235

Δm  = 1.9150664

BE = 1.9150664  * 931.49 MeV/u

BE = 1783.8648 MeV

The binding energy per nucleon is given by the formula; BE/A

BE/A =  1738.648 MeV / 235

BE/A = 7.6 MeV

For 137-Cs, binding energy will be:

Δm is mass defect = 1.23383 u

BE = 1.23383 u * 31.49 MeV/u = 1149.3003 MeV

And, the binding energy per nucleon, BE/A will be:

And, since in the case of 137-Cs, A is 137;

BE/A = 1149.3003 MeV / 137

BE/A = 8.39 MeV

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Light with a wavelength in the film's thickness t exhibits constructive interference.

What exactly is a damaging interference?

When two waves are entirely out of phase (a peak is located in the middle of two waves), destructive interference ensues. In other words, destructive interference occurs when two waves 180 degrees or radians apart from each other cancel each other out.

What causes waves to interfere destructively?

When two waves' maxima are 180 degrees out of phase, destructive interference happens: a positive displacement of one wave is precisely cancelled by a negative displacement of the other wave. The resultant wave has zero amplitude.

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Transfer function g(s)=vo(s)/vi(s) is G(s) = s/2s +1

In frequency domain Inductor L transforms to sL and Capacitor C transforms to 1/sC using this ,the output voltage in frequency i.e s domain using voltage division rule is

Vo (s) = Vi(s) * sL ║1 / 1 + sL║1 = Vi (s) * s║1 / 1+ s║1

assume L = 1H

Vo (s) = Vi (s) * s*1/s+1 / 1+ s*1/s+1

G(s) = Vo (s) /Vi (s) = s / s + 1+ s = s/2s + 1

G(s) = s/2s + 1

A mathematical function known as a system function or network function of a system, sub-system, or component theoretically simulates the output of the system for each potential input. Electronics and control systems use them extensively. This function, which is sometimes called a transfer curve or characteristic curve, is a two-dimensional graph of an independent scalar input vs a dependent scalar output. In electronics and control theory, transfer functions for components are used to build and analyze systems that are constructed from components, particularly when utilizing the block diagram technique.

The transfer function's parameters and units simulate the output response of the device for a variety of potential inputs.

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The ball's parabolic motion causes it to move at a speed of 26.3 m/s right before it strikes the ground, which is faster than its straight-downfall velocity of 17.1 m/s.

How do you determine a golf ball's flight?

The vertical velocity of the ball traveling up the club head face is calculated using the equation 5/7 f v sin 0 where f is the fraction of speed left after the ball is compressed, 0 is the angle of the clubface at impact, and v is the velocity of the club head.

How will the ball's speed change as it descends to the ground?

The ball descends faster and faster. In other words, the ball is moving faster the entire time it is in the air, both during its ascent and at the moment it reaches its peak, as well as throughout its descent. Gravity is what causes the ball to accelerate.

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The amount of Energy stored in the inductor is calculated as;  0.3125 J

What is the energy stored in the inductor?

We are given;

Inductance; L = 100 mH

Resistance; R = 4.0 Ω

Voltage; V = 15 V

Internal resistance; r = 2.0 Ω

Formula for current with internal resistance is;

I = V/(r + R)

I = 15/(2 +4)

I = 2.5 A

Formula for energy stored in inductor is;

U = ¹/₂LI²

U =  ¹/₂ * 100 * 10⁻³ * 2.5²

U = 0.3125J

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A Bow wave is produced when a speed boat moves faster than the waves it produces.

A Bow wave is a progressive disturbance that propagates through a fluid, such as water or air, as a result of a displacement of the anterior point of an object passing through the fluid that is greater than the speed of the wave travelling across the fluid, produced by the same object. If the speed of the object is slower than the waves it produces, then no Bow waves will be generated. In the above scenario, when the speed boat moves faster than the waves it generates, it produces the Bow wave in the water.

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The velocity of the fuel through the nozzle. assume that the fuel filled the entire cross-sectional area of the nozzle. 6.45ft/sq

Velocity is a vector expression of the displacement that an item or particle undergoes with appreciate to time . the usual unit of pace importance (additionally referred to as speed ) is the meter according to 2nd (m/s).

calculation:-

Volume of the fuel pump is V = Avt

V = 687 gallons = 2.6 m³

t = (2.31) 60 × 9

= 1247.4 sec

A = πr²

= 3.141 × (0.0368/2)²

= 0.00106 m³

V = Avt

2.6 m³ = 0.00106 m³ v × 1247.4

V = 1.966 m/s

V = 6.45 ft/sec

Nozzles are used within the rocket and plane engineering to provide jet propulsion, in intensive shattering and spraying technology, in jet gadgets and ejectors and in fuel dynamic lasers and gasoline mills (see gasoline turbine).

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The electrical energy consumed is 2KWh

Electrical energy or electricity consumption represents the amount of electrical energy that has been consumed over a specific time, in units of Wh (or kWh), electricity demand represents that rate at which electrical energy is consumed for a needed output rating, in units of W (or kW).

Energy is given as :

Energy = power ×time

power = 2000w = 2kw

time = 1hr

therefore electrical energy consumed over 1hr

= 2kw× 1hr

= 2kwhr

therefore the electrical energy consumed is 2KWh

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The quantities di and do are measured from the lens (or mirror): False.

True statement: The quantities of di and do are not measured from the lens (or mirror).

A lens is a piece of transparent material that is typically round in form with two polished surfaces that are either convex (bulging) or concave on one or both sides (depressed). In other words, the radius of curvature is constant since the curves are virtually always spherical.

Lenses are a common component of telescopes, binoculars, and cameras, among other image equipment. Additionally, they are utilized as visual aids in spectacles to treat vision problems including myopia and hypermetropia.

The statement is false.

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The conclusion should van helmont have drawn Plants get all or almost all of their mass from a source other than soil

Van Helmont conducted an experiment to see whether the ancient Greek theory was accurate. In a measured amount of dirt, he raised a willow tree. The willow tree had gained roughly 74 kg in weight over the course of five years, he found. Van Helmont came to the conclusion that soil minerals alone cannot account for plant development because the weight of the soil had hardly changed. He believed that the additional plant matter had only come from the water.

Complete question:

In an attempt to find out where a growing plant gets its mass, Van Helmont planted a willow seedling in a pot of soil. After five years, the willow weighed 76.8 kg, and the soil had lost 0.06 kg of weight. Only water had been added to the pot. Which of the following conclusions should Van Helmont have drawn?

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Speed of the 50th-order maxima on the screen = 0.480 m/s

Given in the question,

Wavelength = 633.0 nm

Dimension of slits = 0.200 mm

Speed of students walking toward the screen = 3.00 m/s

The angle of 50th order fringe =

⇒ d sinθ = mλ

⇒ θ = [tex]sin^{-1}[/tex]( 50λ / d)

The distance x from the slit to the screen and the distance y of the 50th-order fringe from the central maximum is related by tan θ,

tan θ = [tex]\frac{y}{x}[/tex]

As the student comes closer to the screen at speed v, the distances between x and y decrease but their ratio stays the same.

tan θ =[tex]\frac{y}{x}[/tex]

y = x tan θ

[tex]\frac{dy}{dt}[/tex] = [tex]\frac{dx}{dt}[/tex]tan θ

Since [tex]\frac{dx}{dt}[/tex] represents a change in speed so we could assume,

[tex]\frac{dx}{dt}[/tex] = v

[tex]\frac{dy}{dt}[/tex] = -v tan θ

As we can see in the question that the distance is decreasing so the change in distance will also decrease hence = [tex]\frac{dy}{dt}[/tex] will be negative.

[tex]v_{50th-order}[/tex] = |[tex]\frac{dy}{dt}[/tex]| = vtanθ

= vtan[ [tex]sin^{-1}[/tex] (mλ / d) ]

By using this formula we will find the speed of the 50th-order fringe,

[tex]v_{50th-order}[/tex] = (3.00m/s)tan { [tex]sin^{-1}[/tex] [ [tex]\frac{50(633.0 * 10^{-9}m) }{0.200 * 10^{-3} }[/tex] ] }

[tex]v_{50th-order}[/tex] = (3.00 m/s) tan (9.1053)

[tex]v_{50th-order}[/tex] = 3.00 x 0.160

[tex]v_{50th-order}[/tex] = 0.480 m/s

Therefore, speed of the 50th-order maxima on the screen = 0.480 m/s

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The capacity of the bottle is 1.2 cups of juice.

The capacity of the bottle is the sum of all the volume of juice contained in the bottle and it is calculated as follows;

Total capacity of the bottle = initial volume of the bottle ÷  volume of the cup of juice

2/3 full ------------------> 4/5 cups

100% full = 1 -------------> x

( ²/₃ ) x = ⁴/₅

The total capacity of the bottle is calculated as follows;

Total capacity of the bottle ⇒ ( ²/₃ ) x = ⁴/₅

5 (2x) = 4 (3)

10x = 12

x = 12 / 10

x = 1.2 cups

Thus, the capacity of the bottle is a function of the amount of cups of juice that can fill it.

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Answer:

1400

Explanation:

because when the 70m long x20m lone will give u 1400 then u time it with 1 that will give u 1400

The rotational kinetic energy of an object that is only rotating about a fixed axis through its center of mass is given by E_rot = 1/2 Iω^2, where I is the moment of inertia and ω is the angular velocity.

The rotational kinetic energy of an object is the energy associated with its rotation about an axis. It is equal to one-half the product of the object's moment of inertia and its angular velocity squared.

It is a form of kinetic energy and is usually represented by the symbol Krot. The rotational kinetic energy of an object depends on its moment of inertia and the angular velocity of its rotation. The equation for rotational kinetic energy is Krot= 1/2 Iω2, where I is the moment of inertia and ω is the angular velocity.

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The statement that is true if matter undergoes both chemical and nuclear reaction is that atoms are rearranged (option A).

A chemical reaction is a process, typically involving the breaking or making of interatomic bonds, in which one or more atoms or substances are changed into others.

Also, a nuclear reaction is a process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and/or subatomic particles in which the number of protons and/or neutrons in a nucleus changes.

In a nuclear reaction, the products may contain a different element or a different isotope of the same element.

This suggests that are atoms are rearranged in both chemical and nuclear reactions.

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The rate at which the volume is increasing is dV/dt equals 21.2 cm3/min.

Adiabatic expansion is defined as expansion in which there is no heat exchange between the system and its environment and the system uses its own energy to perform work.

An ideal gas is enclosed in an insulated container and allowed to expand in a vacuum for adiabatic free expansion. The work done by or on the system is 0 because the gas cannot expand because there is no external pressure for it to do so.

This should, I assume, state that PV 1.4 = C.

By applying the chain rule and the product rule to the derivative with regard to time, we arrive at:

[tex]PV^1^.^4[/tex] = C

[tex]\frac{d}{dt} (PV^1^.^4)[/tex] = d/dt( C)

On further solving the derivative we get,

(-7)(4201.4) + (99)(1.4)(4200.4)dV/dt = 0

-32934 + 1552.6dV/dt = 0

dV/dt = 32934/1552.6

dV/dt equals 21.2 cm3/min.

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Electrical insulators are important because they are used to protect us from electricity.

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Weight of the object on planet X is 19.8 N, then the mass of the object on planet x  is calculated to be 2.02 kg.

In physics, gravitational acceleration is the acceleration of an object in ab free fall within a vacuum, without experiencing drag.

When objects fall on the ground, gravity causes them to accelerate. Acceleration is the change in velocity, and velocity is a measure of the speed and direction of motion. Gravity causes an object to fall to the ground much fast and faster is velocity, longer the object takes to fall.

On planet X;

Given, W= 19.8 N ; a= 9.8 m/s^2

W = m a

m= W/a= 19.8/9.8

Mass of the object on planet x = 2.02 kg

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A boxer rides with a punch so as to reduce force.

Force is an external influence that can change the velocity or motion of an object.

Force is also the amount of impact the object suffers due to another body's action.

Speed is the rate of change of distance w.r.t time, which cannot affects the boxer in any format

Impulse is force times the time interval which does not defines the impact.

Momentum is the product of mass and velocity which does not satisfies the boxer's condition while punching.

Therefore only force is the suitable answer, i.e. a boxer rides with a punch so as to reduce force.

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Answer:

Explanation:

I think its all of the above

have a good day :)

Answer:

0.25 J

Explanation:

Answer: Because physics makes us go to the right

Explanation:

Radio is the electromagnetic radiation wavelength is efficiently observed using ground based telescopes. Option A.

In terms of physics, electromagnetic radiation is made up of electromagnetic field waves that travel over space while carrying radiant electromagnetic energy. It consists of X-rays, gamma rays, microwaves, infrared, light, and radio waves. These waves are all a component of the electromagnetic spectrum.

The energy levels of electromagnetic radiation can range from low to high. It consists of x-rays, gamma rays, infrared light, visible light, ultraviolet light, radio waves, and microwaves.

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