PLEASE HELP!!! I need a good grade!

Answer:

Point number 3.

Explanation:

Volcanism can be studied to found out evidence of the internal structure of the Earth.

Answer:

Volcanism

Explanation:

An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions.

An inelastic collision is a collision in which there is a loss of kinetic energy. While momentum of the system is conserved in an inelastic collision, kinetic energy is not. This is because some kinetic energy had been transferred to something else.

Answer:

0.6amp or I= 0.6

Explanation:

V=IR

12V=I(20)

12/20=I

0.6=I

Answer:

0.6amp

Explanation:

As observed by an astronaut on the asteroid, the speed of the rocket approaching the asteroid is 0.81c.

What is the measured velocity of a rocket approaching an asteroid by an astronaut on the asteroid?

To solve this problem, we can use the relativistic velocity addition formula, which tells us how to add velocities in the special theory of relativity. The formula is:

v = (u + w) / (1 + uw/c^2)

where v denotes the relative velocity of two objects travelling at u and w relative to a third object and c denotes the speed of light.

In this case, the spaceship is moving at a velocity of u = 0.60 c relative to the asteroid, and it launches a rocket forward with a velocity of w = 0.40 c relative to the spaceship. We want to know the velocity v of the rocket relative to the asteroid.

Putting values into the formula, we will get:

v = (0.60c + 0.40c) / (1 + 0.60c * 0.40c/c^2)

v = 1.0c / (1 + 0.24)

v = 1.0c / 1.24

v = 0.806 c

Therefore, the speed of the rocket as measured by an astronaut on the asteroid is 0.806 times the speed of light, or approximately 0.81c.

So the correct answer is option 1) 0.81c.

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Answer:

5.76 N/m

Explanation:

From the question,

F = BILsinФ...................... Equation 1

and then,

F/L = BIsinФ.................. Equation 2

Where F/L = force per meter, I = current, B = magnetic field, Ф = angle.

Given: B = 0.9 T, I = 6.4 A, and Ф = 90° (Perpendicular)

Subtitute these values into equation 2

F/L = 0.9(6.4)(sin90°)

F/L = 5.76 N/m

The force per meter of length on a straight wire will be 5.76 N/m.

It is the type of field where the magnetic force is obtained. With the help of a magnetic field. the magnetic force is obtained it is the field felt around a moving electric charge.

The given data in the problem si;

B is the megnetic field=0.9 T

I is the current = 6.4 A,

Ф is the angle = 90° (Perpendicular)

The megnetic field is found as;

\(\rm F= BILsin \phi \\\\ \frac{F}{L} =BIsin\phi \\\\ \frac{F}{L} =0.9 \times 6.4 \times sin 90^0\\\\ \frac{F}{L} =5.76 / N/m\)

Hence the force per meter of length on a straight wire will be  5.76 N/m.

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The number of seconds in the 40 second interval starting at t = 0 during which the voltage is below 0.21m V is: 19.06 - 7.03 = 12.03 s = 12.97 (approx.) Thus, the correct option is (c) 12.97.

The voltage V, in an electric circuit is measured in millivolts (mV) and is given by the formula V=0.2

sin0.1π(t -0.5)+0.3, where t is the time in seconds from the start of an experiment. We have to use the graph of the function to estimate how many seconds in the 40 second interval starting at t = 0 during which the voltage is below 0.21mV.

Graph of the given function is shown below:

Graph of the given function

As per the graph, it is observed that the voltage is below 0.21 mV from 7.03 s to 19.06 s.

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The relative atomic masses of the four germanium isotopes with curvature radii of 21.0, 21.6, 21.9, and 22.2 cm are roughly 1.64 u, 1.68 u, 1.70 u, and 1.72 u.

Isotopes are the same atomic number but different mass number atoms of the same element.

To solve this problem, we can use the equation for the radius of curvature of an ion in a magnetic field:

r = (mv) / (qB)

where r = radius of curvature,

m = mass of the ion

v = velocity of the ion

q = charge of the ion

B = magnetic field strength. We can assume that the charge of the germanium ions is +1 (since they are singly charged ions), and we can use the mass of the isotope with the largest radius of curvature (corresponding to an atomic mass of 76 u) to find the velocity of the ions.

m = (qrB) / v

We can substitute values,

For r = 21.0 cm:

m = (1 x 1.602 x 10^-19 C x 0.25 T x 21.0 cm) / [(2 x 1.67 x 10^-27 kg) x v]

m = 68.4 u / v

For r = 21.6 cm:

m = (1 x 1.602 x 10^-19 C x 0.25 T x 21.6 cm) / [(2 x 1.67 x 10^-27 kg) x v]

m = 70.1 u / v

For r = 21.9 cm:

m = (1 x 1.602 x 10^-19 C x 0.25 T x 21.9 cm) / [(2 x 1.67 x 10^-27 kg) x v]

m = 71.0 u / v

For r = 22.2 cm:

m = (1 x 1.602 x 10^-19 C x 0.25 T x 22.2 cm) / [(2 x 1.67 x 10^-27 kg) x v]

m = 71.8 u / v

The velocity of the ions can then be calculated using the curve with the biggest radius:

r = (mv) / (qB)

v = (qrB) / m

v = (1 x 1.602 x 10^-19 C x 0.25 T x 22.8 cm) / [(2 x 1.67 x 10^-27 kg) x 76 u]

v = 4.17 x 10^4 m/s

The atomic masses of the other isotopes can be determined by substituting this velocity back into each equation:

m21.0 = 68.4 u / 4.17 x 10^4 m/s = 1.64 u

m21.6 = 70.1 u / 4.17 x 10^4 m/s = 1.68 u

m21.9 = 71.0 u / 4.17 x 10^4 m/s = 1.70 u

m22.2 = 71.8 u / 4.17 x 10^4 m/s = 1.72 u

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Answer:

the final volume of the gas is 1.923 L.

Explanation:

Given;

initial pressure, P₁ = 8.4 atm

initial volume of the gas, V₁ = 1.9 L

final pressure of the gas, P₂ = 8.3 atm

The final volume of the gas is calculated by applying Boyle's law as follows;

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂

V₂ = (8.4 x 1.9) / 8.3

V₂ = 1.923 L

Therefore, the final volume of the gas is 1.923 L.

Answer:

11.78meters

Explanation:

Given data

Mass m = 100kg

Length of cord= 10m

Spring constant k= 35N/m

At the greatest vertical distance, the spring potential energy is equal to the gravitational potential energy

That is

Us=Ug

Us= 1/2kx^2

Ug= mgh

1/2kx^2= mgh

0.5*35*10^2= 100*9.81*h

0.5*35*100=981h

1750=981h

h= 1750/981

h= 1.78

Hence the bungee jumper will reach 1.78+10= 11.78meters below the surface of the bridge

Answer:

\(X=74.7\)

Explanation:

From the question we are told that:

Mass \(m=100kg\)

Length \(l=10m\)

Spring constant \(\mu=35N/m\)

Generally the equation for potential energy of mass is mathematically given by

 \(P.E_m=mgh\)

Since

 \(P.E_m=P.E_s\)

Where

 P.E_s =potential energy of spring

Therefore

\(m*g*(x+10) = 0.5*k*\mu^2\)

\(100*9.8*(x+10) = 0.5*35*\mu^2\)

\(980*(x+10) = 17.5*\mu^2\)

\(980*x+9800 = 17.5*\mu^2\)

 \(17.5*\mu^2 - 980*\mu - 9800 = 0\)

Comparing the equation above with standard quadratic equation

 \(17.5*\mu^2 - 980*\mu - 9800 = 0\)

 \(ax^2+bx+c=0\)

Giving

  \(a=17.5\\ b=-980\\ c=-9800\)

Solving Quadratic equation the roots of the equation is given as

 \(\mu_1=64.66\)

 \(\mu_2=-8.661\)

Since

\(\mu\) can not be -ve

Therefore

The vertical distance attained by the bungee jumper is given as

 \(X=\mu+l\)

 \(X=64.7+10\)

 \(X=74.7\)

Answer:

From the following statements about mechanical waves, identify those that are true for transverse mechanical waves only, those that are true for longitudinal mechanical waves only, and those that are true for both types of waves.

Explanation:

A freely falling observer  is equivalent to an inertial observer who experiences no acceleration according to the equivalence principle (option B)

The equivalence principle establishes that the gravitational force encountered in a localized region is indistinguishable from the pseudo-force perceived by an observer situated within a non-inertial (accelerated) frame of reference.

Consequently, an observer in free fall within a gravitational field undergoes no discernible acceleration, mirroring the experience of an inertial observer.

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Answer:

Fractional error = 0.17

Percent error = 17%

F = 112 ± 19 N

Explanation:

Plug in the values to find the force:

F = (3.5 kg) (20 m/s)² / (12.5 m) = 112 N

Find the fractional error:

ΔF/F = Δm/m + 2Δv/v + Δr/r

ΔF/F = 0.1/3.5 + 2(1/20) + 0.5/12.5

ΔF/F = 0.17

Multiply by 100% to find the percent error:

ΔF/F × 100% = 17%

Solve for the absolute error:

ΔF = 0.17 × 112 N = 19 N

Therefore, the force is:

F = 112 ± 19 N

Explanation:

The sun gravity keeps the solar system i.e planets in its place and orbits if there is no sun the planets would flying off and  It would be complete and utter chaos in our solar system

In the context of Dr. Snodgrass's experiment, the variable being adjusted is the light intensity. Light intensity can be classified as an independent variable, which is a factor that is intentionally changed or manipulated by the researcher.

By adjusting the light intensity, Dr. Snodgrass is able to investigate how this change affects the birds' perception of colors. The purpose of this experiment is to observe and analyze any potential correlations or relationships between the light intensity and the birds' perception of colors.

Light intensity refers to the level or amount of light present in a particular environment. In this experiment, it can be adjusted to different levels, such as high or low intensity, to see if it influences how the birds perceive colors. For example, if the light intensity is increased, the birds may perceive colors as more vibrant or intense, whereas a decrease in light intensity may result in a perceived decrease in color intensity.

Overall, light intensity is an independent variable in Dr. Snodgrass's experiment as it is intentionally adjusted to investigate its impact on the birds' perception of colors. By studying the relationship between light intensity and color perception, valuable insights can be gained regarding the birds' visual capabilities.

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The area is reduced by 1/3, the resistance will increase by a factor of 3. Therefore, the new resistance is 3R * 3 = 9R.

The resistance of a conductor is given by the formula R = ρ (L/A), where ρ is the resistivity, L is the length, and A is the cross-sectional area. Since the volume remains the same, the product of length and area should remain constant. When the length is tripled, the cross-sectional area must be reduced by a factor of 1/3 to maintain the volume. The resistance is inversely proportional to the cross-sectional area, so if the area is reduced by 1/3, the resistance will increase by a factor of 3. Therefore, the new resistance is 3R * 3 = 9R.

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Answer: Igneous it forms because of magma but magma is under the earths surface so its Igneous

Explanation:

Answer:

its metamorphic.

Explanation:

six cm - centimeters

Answer:

1. The first model of the atom was developed by JJ Thomson in 1904, who thought that atoms were composed purely of negatively charged electrons. This model was known as the 'plum pudding' model.

This theory was then disproved by Ernest Rutherford and the gold foil experiment in 1911, where Rutherford shot alpha particles at gold foil, and noticed that some went through and some bounced back, implying the existence of a positive nucleus.

In 1913, Niels Bohr proposed a model of the atom where the electrons were contained within quantized shells that orbited the nucleus. This was because it was impossible for the cloud of negative electrons proposed by Rutherford to exist, as the negative electrons would be drawn to the positive nucleus, and the atom would collapse in on itself.

In 1926, the Austrian physicist Erwin Schrödinger created a quantum mechanical model of the atom by combining the equations for the behavior of waves with the de Broglie equation to generate a mathematical model for the distribution of electrons in an atom.

However the model used today is closest to the Bohr model of the atom, using the quantized shells to contain the electrons.

2. Joseph Priestly, Antoine Lavoisier, and others set the stage for the foundation of chemistry. They demonstrated that substances could combine to form new materials. It was the English chemist, John Dalton, who put the pieces of the puzzle together and developed an atomic theory in 1803.

3.  No because it was believed that the atom was the smallest part that could ever be possible. But with the recent discoveries of large number of subatomic particles, this does not hold true.

Explanation:

Sorry I could only do part 1.

A space probe weighing 50,000kg will experience no net force between the Earth and the Moon when it is at a point in space called Lagrange point L1.What is Lagrange point L1?The first Lagrange point (L1) is a location in space where the gravitational forces of the Earth and the Moon balance out.

At this point, an object such as a satellite can remain relatively stationary with respect to both bodies.The L1 point is approximately 1.5 million km from the Earth, in the direction of the Moon, and it orbits the Sun along with the Earth and the Moon. It is a popular location for observing the Sun, as a satellite placed at this point can maintain a constant position relative to the Sun without being obscured by the Earth or the Moon.How can you find Lagrange point L1?To find the L1 point, you need to solve for the point in the Earth-Moon system where the gravitational forces of the two bodies cancel out. This point can be found by solving for the gravitational forces of the Earth and the Moon using Newton's Law of Universal Gravitation and setting them equal to each other.There are no net forces at the Lagrange points because the gravitational forces of the Earth and Moon are balanced out by the centrifugal force of the object orbiting the Earth-Moon system. This means that a space probe weighing 50,000kg will experience no net force when it is at the L1 point between the Earth and the Moon.

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So free point OK ty see ya!

Answer:

9 900 000 000 000 km = 9 900 000 000 000 000 m

Explanation:

9 900 000 000 000 * 1000

A white dwarf, which is the remnant of a low to intermediate-mass star, is primarily supported by electron degeneracy pressure.

This pressure arises from the principles of quantum mechanics, specifically the Pauli Exclusion Principle, which states that no two fermions, such as electrons, can occupy the same quantum state simultaneously. As a star exhausts its nuclear fuel and evolves, its core contracts, causing the electrons to become closely packed together. At this point, electron degeneracy pressure prevents further compression and provides the necessary support against the inward force of gravity.

Thermal pressure, radiation pressure, and neutron degeneracy pressure are also relevant in stellar evolution; however, they play different roles in supporting various types of stars or stellar remnants. Thermal pressure is crucial in supporting main-sequence stars, while radiation pressure is vital for high-mass stars. Neutron degeneracy pressure, on the other hand, provides support for neutron stars that result from the gravitational collapse of massive stars.

In summary, electron degeneracy pressure is the primary force that supports a white dwarf, while other pressure types are responsible for maintaining the stability of different stars and stellar remnants.

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The correct answer is b) never true. When capacitors are connected in series, the equivalent capacitance of the combination decreases. This is because the total charge on the combination is equal to the charge on each individual capacitor, but the voltage across the combination is the sum of the voltages across each capacitor.

The formula for capacitance is C = Q/V, so if the charge is the same but the voltage is higher, the capacitance will be lower.

Therefore, as more and more capacitors are connected in series, the equivalent capacitance of the combination decreases.

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(a) The work done on the astronaut by the force from the helicopter can be calculated using the formula:

Work = Force × Distance × Cosine(theta)

Work = (69 kg x 9.8 m/s^2) x 13 m

= 8,136.6 N x 13 m

= 105,974.8 Joules

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Altitude of Earth's geostationary orbit is approximately 35,786 km above the surface of the Earth.

What is Geostationary?

Geostationary refers to an object in orbit around the Earth that appears to remain fixed in the same position above the Earth's surface. Specifically, a geostationary orbit is an orbit in which a satellite orbits the Earth at the same rate that the Earth rotates, so that the satellite appears to remain stationary relative to a fixed point on the Earth's surface.

The altitude of Earth's geostationary orbit can be found using the formula:

h = R(3/2) * √(M/m)

where:

h is the altitude of the geostationary orbit

R is the radius of the Earth

M is the mass of the Earth

m is the mass of the satellite

For a geostationary orbit, the satellite has a period of 24 hours, which means it orbits the Earth once every 24 hours. This requires the satellite to be at an altitude where its orbital period matches the Earth's rotational period, and this altitude is known as the geostationary orbit.

For a geostationary satellite, the mass of the satellite is negligible compared to the mass of the Earth, so we can assume that m is much smaller than M.

Plugging in the given values, we get:

h = (6.38 x 10^6 m) * (3/2) * √(5.97 x 10^24 kg / m)

h = 35,786 km

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The magnitude of the momentum of the two dice system is 153g m/s when a blue 6. 5 g six sided die and a green 7. 5 g eight sided die is rolling in the opposite directions.

Given the mass of first die (m1) = 6.5g

The mass of second die (m2) = 7.5g

The velocity of first die (v1) = 12m/s

The velocity of second die (v2) = 10m/s

The momentum of a system is the product of its mass and velocity.

Thus, the momentum of the blue 6.5 g six sided die is = m1 * v1

6.5 g x 12 m/s = 78 g m/s.

The momentum of the green 7.5 g eight sided die is = m2 * v2

7.5 g x 10 m/s = 75 g m/s.

The magnitude of the momentum of the two dice system is the sum of the momentums of the individual dice: m1 * v1 + m2 * v2

78 g m/s + 75 g m/s = 153 g m/s.

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