A wheel rotates at a constant rate of 2x103 rev/min.

(a) what is its angular velocity in radians per second?

(b) through what angle does it turn in 10 s?

Express the solution in radians and degrees.

Answer:

visible region

Explanation:

According to the procedure in section 2, in visible region the data collected on hydrogen and helium’s line spectra.

Electromagnetic spectrum are the wave which is form of energy and includes the waves such as radio waves, gamma waves, visible light waves etc.

An element’s line spectrum can include emissions at wavelengths throughout the electromagnetic spectrum including ultraviolet, visible, and infrared.

Types of electromagnetic spectrum-

The hydrogen line spectra fall between wavelength, 410 nm to 656 nm. The helium line spectra fall between wavelength, 400 nm to 781 nm.This two fall in the visible region of line spectra.

According to the procedure in section 2, in visible region the data collected on hydrogen and helium’s line spectra.

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The molecules of water determines  the macro scale appearance of the lake .

The term lake is used to describe any large body of water that is surrounded by land. We know that water is composed of molecules and the orientation of molecules affect the macro scale appearance of the water.

Hence, as the molecules of water change their orientation, the macro scale appearance of the lake changes likewise.

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Answer:

Take a look below

Explanation:

Answer:

C. 1.42 s

Explanation:

Givens:

length = 0.5m

gravity = 9.807 m/s

Solve:

T = 2π√(L/g)

T = 2π√(0.5/9.807)

T = 2π√(0.0509)

T = 2π * 0.22579

T = 6.28318 * 0.22579

T = 1.418 ≈ 1.42s

Answer:

Jo

Explanation:

irradiating food doesn't make it radioactive (that's contamination) and beta particles are stopped by aluminium foil or thin metals, so it may not pass through thick packaging (usually gamma is used to irradiate foods as it can pass through the packaging)

Answer:

-1650 J

Explanation:

When an object moves at a certain velocity v0 and changes it to v1, a change in its kinetic energy is achieved.

The magnetic force vector on the particle is (-350.00 î + 50.00 j) N. Option D) (-350 î + 50.0ỉ) is the correct answer. we can use the equation: F = q * (v x B)

To find the magnetic force on a charged particle moving in a magnetic field, we can use the equation:

F = q * (v x B)

where F is the magnetic force vector, q is the charge of the particle, v is the velocity vector, and B is the magnetic field vector.

Given:

q = -5.00 C (charge of the particle)

v = (1.00 î + 7.00 j) m/s (velocity of the particle)

B = 10.00 T (magnetic field)

Substituting the values into the equation:

F = (-5.00 C) * ((1.00 î + 7.00 j) m/s x (10.00 T) î)

The cross-product of the velocity vector and the magnetic field vector can be calculated as:

v x B = (v_y * B_z - v_z * B_y) î + (-v_x * B_z + v_z * B_x) j + (v_x * B_y - v_y * B_x) k

Substituting the values:

v x B = (7.00 * 10.00) î + (-(1.00 * 10.00)) j + ((1.00 * 7.00) - (7.00 * 1.00)) k

= 70.00 î - 10.00 j + 0.00 k

= 70.00 î - 10.00 j

Now, calculating the magnetic force:

F = (-5.00 C) * (70.00 î - 10.00 j)

= -350.00 î + 50.00 j

Therefore, the magnetic force vector on the particle is (-350.00 î + 50.00 j) N. Option D) (-350 î + 50.0ỉ) is the correct answer.

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The weight of an object mass of 100 kg on the surface of a Planet willl is 981 N.

The weight of matter is found as the product of the mass and the gravitational acceleration;

Given data;

Weight of an object,W =?

Mass,m = 100 kg

\(\rm W= mg \\\\ \rm W= 100 \ kg \times 9.81 \ m/sec^2 \\\\ W=981 \ N\)

Hence the weight of an object willl be 981 N.

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The interaction between the sprinter and the starting blocks best represents Newton's Third Law. Newton's Third Law is "For every action, there is an equal and opposite reaction."

When a sprinter pushes off against the starting blocks, the force they exert on the blocks (the action) is met with an equal and opposite force from the blocks pushing back against the sprinter (the reaction). This reaction force propels the sprinter forward and helps them to achieve a more powerful and explosive start. Newton's Third Law of Motion is particularly relevant to sports and athletics, as many actions in sports involve interactions between two objects or individuals, such as a runner pushing off against the ground or a football player colliding with another player.

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Answer:

A physical property of matter is electric charge. It is caused by an imbalance in the number of protons and electrons in a material. Whether there are more protons than electrons in a substance, it is positively charged if there are more electrons than protons, it is negatively charged.

Explanation:

Answer:

d no light can only change things by warming them up , so it cannot cause the paper to change colur

We first draw a force diagram that shows the forces acting on the child-seat system and apply Newton's second law to solve the problem. The child's path is an arc of a circle, since the top ends of the chains are fixed. Then at the lowest point the child's motion is changing in direction: He moves with centripetal acceleration even as his speed is not changing and his tangentialacceleration is zero.

∑F=Fnet=2T−mg=ma= mv²/r

With:

Fnet =2T−mg=2(300N)−(40.0kg)(9.80m/s² )=208N

solving for v gives,

\(v = \sqrt{ \frac{f \:net.r}{m} } = \sqrt{ \frac{208.3}{40} } = 3.95 \frac{m}{s} \)

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the answer to the question is D. Violet. In the spectrum of white light, the color that corresponds to the highest temperature is violet.

This is because the color of light that we see is directly related to the wavelength of the light, and the wavelength of violet light is the shortest of all visible colors.According to Wien's law, the wavelength of light emitted by an object is inversely proportional to its temperature. This means that the higher the temperature of an object, the shorter the wavelength of light it emits.Since violet light has the shortest wavelength of all visible colors, it corresponds to the highest temperature. Red light, on the other hand, has the longest wavelength and corresponds to the lowest temperature.

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Answer:

Explanation:

Given:

P = 12 W

R = 270 Ω

t = 2.5 s

____________

Q - ?

Power:

P = I²·R

Current strength:

I = √ (P / R) = √ (12 / 270) ≈ 0.21 A

Charge:

Q = I·t = 0.21·2.5 = 0,525 C

The two instances where there is no change in the state of motion in an object on application of force on the object are when an object is at rest, and when an object is in motion,  

In either case, the net force on the object is zero, this is referred to as Newton's First Law, which states that if the net force acting on an object is zero, the object will remain at rest or in a state of uniform motion. This law is also known as the law of inertia. The primary implication of Newton's First Law is that an object will remain in a state of uniform motion until acted upon by an unbalanced force.

As a result, any object at rest or in uniform motion will remain so until a net external force acts on it. The object will accelerate in the direction of the net force applied to it. For instance, if we apply a force of 10 N to a book resting on a table, it will not move if the frictional force is more significant than the applied force. So therefore when an object is at rest, and when an object is in motion, are the two instances where there is no change in the state of motion of an object on the application of force on the object.

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Notice that 40.35 is 5 times the half-life of 8.07 days. So in this time, the starting amount x of the sample was halved 5 times until 25 g of it were left, meaning

x/2⁵ = 25 g

Solve for x :

x = 2⁵ • (25 g) = 800 g

Answer:

The south pole of one magnet attracts the north pole of the other magnet.

Explanation:

Opposites attract; likes repel :)

Answer:

C or third picture

Explanation:

Answer:

At position "B" the northern hemisphere is tilted the most from the earth-sun direction and will experience the shortest hours of daylight, (and also the most indirect sun rays).

Answer:

0

Explanation:

When water is pumped out of well A, it causes a drop of 7 inches at point C; if water is pumped from well B into well A (at the same rate the water is pumped out of well A), then it will give a rise of 7 inches at well C. Therefore the net drawdown at well C is:

S = 7-7 = 0

Two statements, that are true of mechanical waves, are:

A mechanical wave is a wave in physics that involves the oscillation of matter and transmits energy across a medium. While waves can travel great distances, the transmission medium—the material—can only move so far.

The oscillating material stays close to its initial equilibrium position as a result. Only medium with elasticity and inertia can form mechanical waves. Transverse, longitudinal, and surface waves are the three different forms of mechanical waves.

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450 V is the potential difference between xi = −20cm and xf = 80cm. The difference in charge carriers' energy between two places in a circuit is known as the potential difference.

Voltage, which is denoted by the symbol V, is a unit of measurement for potential difference. Charge carriers in a circuit flow through them, transferring energy to the circuit's electrical components.

given Ex= -1500x V/m

Eₓ = -1500x V/M

hence required potential difference

V= ∫ Edx

V= (1500/2)*(0.8² - (-0.2)²)

= 750*(0.64 - 0.04)

= 450 V

To determine the potential difference, we use a voltmeter (or voltage). 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.

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Answer: 472.556m⋅s−1

Explanation: λ=7.83cm=7.83⋅(1cm)=7.83⋅(1cm×0.01m1cm)=0.0783m

Among the given options, cultural differences are most likely to be the centrifugal force within the EU in the future. The EU is a political and economic union of 27 member states, and cultural differences among its member states have always been present.

With the increasing number of immigrants from different parts of the world, the cultural differences among EU member states are becoming more prominent. Each member state has its unique language, history, customs, and traditions, which can create misunderstandings and conflicts among the member states.
The EU aims to promote unity and solidarity among its member states, but cultural differences can lead to a lack of understanding and trust between them. The EU's diverse cultural heritage is both a strength and a challenge for the union. The EU needs to find a way to respect the cultural diversity of its member states while maintaining its unity.
However, the cultural differences among the member states can still cause tensions and conflicts in the future. Therefore, it is crucial for the EU to continue to foster cultural awareness and understanding among its member states to maintain the union's cohesion and stability.

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complete question:

Which of these is most likely to be a centrifugal force within the EU in the future?

a. trade barriers

b. closed borders

c. pollution problems

d. cultural differences

Answer:

Elements in a family have the same

Ans C. number of valence electrons

Answer:

r_eq = 320 Ω

Explanation:

It is asked to find the equivalent resistance of a series circuit formed by two resistors r₁ and r₂

           r_eq = r₁ + r₂

           r_eq = 100 + 220

           r_eq = 320 Ω

with this value we can find the current that circulates through the circuit

           V = r_eq i

            i = V / r_eq

            i = 6.4 / 320

            i = 0.02 A

The new frequency of oscillation, when the spring constant is doubled, is approximately 28.28 Hz, which is the square root of 2 times the original frequency of 20 Hz.

When a mass is attached to a spring and oscillating back and forth, the oscillation frequency is directly proportional to the square root of the spring constant.

The formula that links mass, spring constant, and frequency is as follows:

\($$f=\frac{1}{2π}\sqrt{\frac{k}{m}}$$\)

where f = frequency, k = spring constant, and m = mass of the object.

Therefore, we can calculate the new frequency as follows:Original frequency: \($f_1 = 20 Hz$\)

New spring constant:

\($k_2 = 2k_1$\) where \($k_1$\) is the original spring constant

New frequency:

\($f_2 = \frac{1}{2π}\sqrt{\frac{k_2}{m}}$\)

If we substitute $k_2 = 2k_1$ into the above equation and simplify, we get:

\($f_2 = \frac{1}{2π}\sqrt{\frac{2k_1}{m}}$\)

\($f_2 = \frac{1}{2π}\sqrt{\frac{2}{m} k_1}$\)

\($f_2 = \frac{1}{2π}\sqrt{\frac{k_1}{m}}\sqrt{2}$\)

\($f_2 = \sqrt{2}f_1$\)

Therefore, the new frequency of oscillation is \($\sqrt{2}$\) times the original frequency, or:

\($f_2 = \sqrt{2}f_1 = \sqrt{2}(20 Hz) = 28.28 Hz$\)

Hence, the new frequency of oscillation is 28.28 Hz.

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Answer:

Explanation:

Since the roundabout is rotating with uniform velocity ,

input power = frictional power

frictional power = 2.5 kW

frictional torque x angular velocity = 2.5 kW

frictional torque x .47 = 2.5 kW

frictional torque = 2.5 / .47 kN .m

= 5.32 kN . m

= 5 kN.m

b )

When power is switched off , it will decelerate because of frictional torque .