Which of the following is a mixture?
a air
biron
Chydrogen
d nickel

For the beam and loading shown below (a), (b), and (c),

(a) draw the shear and bending-moment diagrams,

(b) determine the maximum absolute values of the shear and bending moment.

(a)

Answer:

Explanation:

Eggs, generally speaking, existed before chickens did. The oldest fossils of dinosaur eggs and embryos are about 190 million years old. Archaeopteryx fossils, which are the oldest generally accepted as birds, are around 150 million years old, which means that birds in general came after eggs in general.

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Answer:

i think its D

Explanation:

Answer:

The highness or lowness of a sound is perceived as pitch. Pitch is a perceptual property of sound that allows us to distinguish between sounds that have the same loudness and duration, but differ in their frequency content. The pitch of a sound is determined by the frequency of the sound wave, with higher frequencies producing higher pitches and lower frequencies producing lower pitches. The pitch is what makes a sound distinguishable and is important in music, language, and communication.

Answer:

λ = 396.7 nm

Explanation:

For this exercise we use the diffraction ratio of a grating

           d sin θ = m λ

in general the networks works in the first order m = 1

we can use trigonometry, remembering that in diffraction experiments the angles are small

           tan θ = y / L

           tan θ = \(\frac{sin \theta}{cos \theta}\) = sin θ

           sin θ = y / L

we substitute

          \(d \ \frac{y}{L}\) = m λ

with the initial data we look for the distance between the lines

           d = \(\frac{m \lambda \ L}{y}\)

           d = 1 656 10⁻⁹ 1.00 / 0.600

            d = 1.09 10⁻⁶ m

for the unknown lamp we look for the wavelength

           λ = d y / L m

           λ = 1.09 10⁻⁶ 0.364 / 1.00 1

           λ = 3.9676 10⁻⁷ m

           λ = 3.967 10⁻⁷ m

we reduce nm

           λ = 396.7 nm

Answer:

all are harmful to the body

The loss of gravity has a significant impact on the human body. When in a state of weightlessness, the body's muscles and bones are not required to work as hard as they do on Earth.

As a result, astronauts in space experience muscle and bone loss, as well as a decrease in overall physical fitness. This is due to the fact that gravity is no longer providing the resistance needed for muscles and bones to maintain their strength.

This effect can be beneficial for astronauts on a mission to Mars. The journey to Mars takes several months, and astronauts will be in a state of weightlessness for a large portion of that time.

The muscle and bone loss that occurs in space can be used to the astronaut's advantage. When they land on Mars, the planet's gravity will be only about 38% of Earth's. As a result, the astronauts will be better able to adapt to the planet's lower gravity and carry out their mission.

Hence, It's important to note that these effects are not permanent, and scientists are currently researching ways to mitigate the negative effects of weightlessness and to develop exercise regimens and other countermeasures to help astronauts maintain their physical fitness during long-duration spaceflight.

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The resistor is a component with a fixed resistance.



Answer:

un café y a seguir pensando porque no se la respuesta xd

Answer:

2.5x10-3C

Explanation:

The value of the charge that experiences a force of 2.4 × 10–3 N in an electric field of 6.8 × 10–5 N/C 2.5x10-3C.

The electric force per unit charge is referred to as the electric field. It is assumed that the field's direction corresponds to the force it would apply to a positive test charge.

From a positive point charge, the electric field radiates outward, and from a negative point charge, it radiates in.

The vector sum of the individual fields can be used to calculate the electric field from any number of point charges. A negative charge's field is thought to be directed toward a positive number, which is seen as an outward field.

Therefore, The value of the charge that experiences a force of 2.4 × 10–3 N in an electric field of 6.8 × 10–5 N/C 2.5x10-3C.

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Answer:

b. parallel

Explanation:

Answer:

instruments

Explanation:

The separation distance in B is a number times greater than in A, then the force of attraction in B is less than A.

The force of attraction between two charged object is determined by applying Coulomb's law.

Coulomb's law states that the force of attraction or repulsion between two charged objects is directly proportional to the product of the charges and inversely proportional to the square of the distance between the charges.

Mathematically, this law is written as;

F = Kq₁q₂/r²

where;

From the formula given above, as the distance of separation increases, the magnitude of the force of attraction between the charges decreases. Also, as the distance of separation between the charges decreases, the magnitude of the force of attraction between the charges increases.

Thus, the magnitude of the force of attraction between charged objects is a function of the magnitude of the charges and distance of separation between the charges.

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Answer: Participating in all of the above can improve flexibility.

Explanation:

A practice that helps in improving or developing inherent power in order to bring peace and harmony to the body of a person is called yoga.

Yoga includes different postures that also help in providing flexibility to the body.

Pilates is another method of providing muscular strength and low impact flexibility to a human body.

Swimming also a good exercise that provides flexibility.

Thus, we can conclude that participating in all of the above can improve flexibility.

Answer:

Explanation:

If unknown capacitance C1, C2, C3 and C4 are connected in series to one another, their equivalent capacitance of the circuit will be expressed as shown

\(\frac{1}{C_t} = \frac{1}{C_1} +\frac{1}{C_2} +\frac{1}{C_3} +\frac{1}{C_4} \\\)

Given the capacitance's 3.0 pF, 2.0 pF, 5.0 pF and X pF connected in series to each other. If the equivalent capacitance of the circuit is 0.83 pF, then to get X, we will apply the formula above;

\(\frac{1}{0.83} = \frac{1}{3.0} +\frac{1}{2.0} +\frac{1}{5.0} +\frac{1}{C_4} \\\\\\1.205 = 0.333+0.5+0.2+\frac{1}{C_4} \\\\1.205 = 1.033 + \frac{1}{C_4} \\\\\frac{1}{C_4} = 1.205-1.033\\\\\frac{1}{C_4} = 0.172\\\\C_4 = \frac{1}{0.172}\\ \\C_4 = 5.8pF\\\\\)

C₄ ≈ 6pF

Hence the value of the X capacitor is approximately 6pF

Answer: Density = 6071.428571 kg/m³

Explanation: Given that mass m=17 kg

volume displaced v=2.8L

We know that

density = mass/volume

Here density=17kg/2.8L

Also 1L=1000m³ Hence

density=17kg/2.8×10⁻³m³

           =6071.428571 kg/m³

Answer:

Explanation:

According to Newton's Law of Gravitation, the gravitational force between two objects is always mutual, meaning that the force that one object exerts on the other is equal in magnitude but opposite in direction.

This means that if planet A exerts a gravitational force on planet B, then planet B will also exert a gravitational force on planet A. The magnitude of this force will be equal to the magnitude of the force that planet A exerts on planet B, but the direction will be opposite.

For example, if planet A exerts a gravitational force on planet B that is pulling planet B towards planet A, then planet B will also exert a gravitational force on planet A that is pulling planet A towards planet B. The magnitude of these two forces will be equal, but the directions will be opposite.

hat he sais

Answer:w

Explanation:

If you pull with a constant force of 400 N for 0.2 meters, then the work done will be equal to 80 J.

In physics, the word "work" involves the measurement of energy transfer that takes place when an item is moved over a range by an externally applied, at least a portion of which is applied within the direction of the displacement.

The length of the path is multiplied by the element of a force acting all along the path to calculate work if the force is constant. The work W is theoretically equivalent towards the force f times the length d, or W = fd, to portray this concept.

As per the given information in the question,

Force, f = 400 N

Displacement, d = 0.2 meters

\(Work done(W)=Force(f)*Displacement(d)\)

W = 400 × 0.2

W = 80 J.

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Answer: 200 joules I think.

Explanation:

Answer:

Explanation shown below.

Explanation:

1.The number of images formed by 2 parallel mirrors is an infinite number of images.

2. The characteristics of a plane mirror is such that the object distance equals the image distance.

Hence the object distance is 8.7cm from the right; the image formed would be 8.7cm behind the mirror.

Now a second image is going to be formed by the left mirror which is going to have an image distance of 30.1cm behind the mirror.

Now this image would be reflected on the right side to form a new image which is going to be seen as 38.8 +30.1 = 68.9cm behind the right Mirror .

Hence the shortest distances are 8.7cm and 68.9cm

3. The number of reflections is infinite for both cases.

The voltage across the wire is 0.635 V.

The resistance of the wire can be calculated using the formula:

R = (ρL)/A

where ρ is the resistivity of the wire, L is its length, A is its cross-sectional area, and R is its resistance.

The cross-sectional area of the wire can be calculated using the formula for the area of a circle:

A = πr^2

where r is the radius of the wire.

Substituting the given values, we get:

A = π(0.50 x 10^-3 m)^2 = 7.85 x 10^-7 m^2

R = (100 x 10^-8 O * m)(1.0 m) / (7.85 x 10^-7 m^2) = 1.27 Ω

The voltage across the wire can be calculated using Ohm's law:

V = IR

where I is the current through the wire.

Substituting the given values, we get:

V = (0.50 A)(1.27 Ω) = 0.635 V

Therefore, the voltage across the wire is 0.635 V.

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Answer:

f(y)=2

Explanation:

5x/5-20/5

x=4

f(y+2)=4

    -2   -2

f(y)=2

Answer:

Block A velocity is 23.33 m/s and the collission is not elastic.

Explanation:

a) m1v1 + m2v2 = m1v1' + m2v2'

Plug in givens

90+60=3v1'+80

solve for v1'= 23.33m/s

b) Find the initial and final kinetic energy of Block B

Ki= 1/2(4)(15)^2 + 1/2(3)(30)^2 = 1800 J

Kf= 1/2(4)(20)^2 + 1/2(3)*(23.33)^2= 1616.433J

Since Ki does not equal Kf the collision is not elastic

Therefore, the magnetic force on an electron is 1.175 x 10⁻¹⁴N in the positive y-direction.

The force experienced by a moving charge in a magnetic field is given by the Lorentz force law. Since the charge on a proton is positive and that on an electron is negative, the direction of the magnetic force experienced by each is different.In this question, we need to find the magnitude and direction of the magnetic force on a proton and an electron as they travel from the Sun to the Earth.

Let's first calculate the magnetic force on a proton:

F = qvBsinθ

where q = charge of the particle

v = velocity of the particle

B = magnetic field strength

θ = angle between the velocity of the particle and the magnetic field = 90° (since the proton is moving perpendicular to the magnetic field)

Therefore,

F = qvBsinθ

= (1.6 x 10⁻¹⁹) x (3.99 x 10⁵) x (2.93 x 10⁻⁸) x sin 90°

= 1.175 x 10⁻¹⁴ N

Direction of magnetic force on a proton:The direction of the magnetic force on a proton can be found using the right-hand rule. According to this rule, if we point the thumb of our right hand in the direction of the particle's velocity (in the positive x-direction) and the fingers in the direction of the magnetic field (in the positive z-direction), then the magnetic force will be perpendicular to both and will be in the negative y-direction.

Therefore, the magnetic force on a proton is 1.175 x 10^-14 N in the negative y-direction.

- Now, let's calculate the magnetic force on an electron:

Again using the Lorentz force law,

F = qvBsinθ

= (1.6 x 10⁻¹⁹) x (3.99 x 10⁵) x (2.93 x 10⁻⁸) x sin 90°

= -1.175 x 10⁻¹⁴ N (the negative sign indicates that the direction of the magnetic force is opposite to that of the proton)

Direction of magnetic force on an electron:Again using the right-hand rule, we can find the direction of the magnetic force on an electron. If we point the thumb of our right hand in the direction of the particle's velocity (in the positive x-direction) and the fingers in the direction of the magnetic field (in the positive z-direction), then the magnetic force will be perpendicular to both and will be in the positive y-direction.

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Answer:

C. 22 m/s

Explanation:

Ignoring air friction....all of the Potential energy will be converted to Kinetic Energy

mgh = 1/2 m ^v^2

gh = 1/2 v^2

sqrt (2 gh) = v   =   ~ 22.1 m/s

The minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

To maintain equilibrium, the torques acting on the meter stick must balance each other. The torque is given by the formula:

τ = r * F * sin(θ)

where τ is the torque, r is the distance from the pivot point to the point where the force is applied, F is the force applied, and θ is the angle between the force vector and the lever arm.

In this case, the meter stick is in equilibrium when the torques on both sides of the pivot point cancel each other out. The torque due to the weight of the meter stick itself is acting at the center of mass of the meter stick, which is at the 50.0 cm mark.

Let's denote the mass to be placed on the 0.00 cm mark as M. The torque due to the weight of M can be calculated as:

τ_M = r_M * F_M * sin(θ)

where r_M is the distance from the pivot point to the 0.00 cm mark (which is 30.0 cm), F_M is the weight of M, and θ is the angle between the weight vector and the lever arm.

Since the system is in equilibrium, the torques on both sides of the pivot point must be equal:

τ_M = τ_stick

r_M * F_M * sin(θ) = r_stick * F_stick * sin(θ)

Substituting the given values:

30.0 cm * F_M = 20.0 cm * (0.0400 kg * 9.8 m/s^2)

Solving for F_M:

F_M = (20.0 cm / 30.0 cm) * (0.0400 kg * 9.8 m/s^2)

F_M = 0.0264 kg * 9.8 m/s^2

F_M = 0.25872 N

Finally, we can convert the force into mass using the formula:

F = m * g

0.25872 N = M * 9.8 m/s^2

M = 0.0264 kg

Therefore, the minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

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Answer:

what am i suppose to answer o.o

Explanation:

Answer:

The magnitude will be "2212 N".

Explanation:

The given values are:

Initial speed, u = 250 m/s

Final speed, v = 0

Mass, m = 16.0 = 0.016 kg

Distance, d = 22.6 cm

On converting cm into m, we get

d = 0.226 m

As we know,

⇒  \(v^2-u^2=-2ad\)

⇒  \(a=\frac{v^2-u^2}{-2d}\)

On putting the estimated values, we get

⇒    \(=\frac{(0)^2-(250)^2}{-2\times 0.226}\)

⇒    \(=\frac{0-62500}{-0.452}\)

⇒    \(=13,8276 \ m/s^2\)

Now,

Force, \(F=ma\)

On putting values, we get

⇒            \(=0.016\times 138276\)

⇒            \(=2212 \ N\) (magnitude)

The magnitude of the stopping force on the bullet is 2,212.4 N in opposite direction to the bullet.

The given parameters;

The acceleration of the bullet is calculated as follows;

v² = u² - 2ad

where;

0 = 250² - a(2 x 0.226)

0.452a = 62500

\(a = \frac{62500}{0.452} \\\\a = 138,274.34 \ m/s^2\\\\\)

The magnitude of the stopping force on the bullet is calculated as follows;

F = ma

F = 0.016 x 138,274.34

F = 2,212.4 N

Thus, the magnitude of the stopping force on the bullet is 2,212.4 N in opposite direction to the bullet.

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There is more to the Earth than what we can see on the surface. In fact, if you were able to hold the Earth in your hand and slice it in half, you'd see that it has multiple layers. But of course, the interior of our world continues to hold some mysteries for us. Even as we intrepidly explore other worlds and deploy satellites into orbit, the inner recesses of our planet remains off limit from us.

However, advances in seismology have allowed us to learn a great deal about the Earth and the many layers that make it up. Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core. Let's take a look at them and see what they have going on.

Like all terrestrial planets, the Earth's interior is differentiated. This means that its internal structure consists of layers, arranged like the skin of an onion. Peel back one, and you find another, distinguished from the last by its chemical and geological properties, as well as vast differences in temperature and pressure.

Explanation: