A satellite orbiting Earth at an orbital radius r has a velocity v. which represents the velocity if the satellite is moved to an orbital radius of 3r?

Final answer:

Clay samples from the Western Hemisphere are significant for studying ancient migration patterns, but they are not connected to the Alvarez hypothesis, which concerns the asteroid impact at the end of the Cretaceous period. The discussion of human migration into the Americas includes theories of both coastal and interior pathways. European contact led to diseases affecting the Indigenous population, with the post-colonization period marking the lowest numbers due to disease and conflict.

Explanation:

The significance of clay samples from the Western Hemisphere lies in their potential to provide insight into ancient migration patterns in the Americas. When discussing significant findings like clay samples or the Alvarez hypothesis, it's worth noting that the latter relates to the mass extinction at the end of the Cretaceous period, caused by an asteroid impact, rather than early human migration. Consequently, there's no direct modification of the Alvarez hypothesis in response to clay samples from the Western Hemisphere. In historical context, when dealing with human migration theories in the Americas, two predominant arguments arise: one supporting a coastal migration and the other an interior pathway. The debate over which came first remains unresolved, but both theories are supported by archaeological evidence.

As for the historical antecedents explaining why people in the Western Hemisphere became ill following contact with Europeans, it was largely due to a lack of immunity to diseases brought by Europeans, to which Indigenous populations had never been exposed. The year identified with the lowest population of Indigenous people varies according to different sources but is commonly placed after the European colonization, due to the devastating impact of disease, conflict, and dispossession.

Answer: True

Explanation: Epeirogeny is the regional uplift of an extensive area of the earth's crust.

Answer:

?

Explanation:

Answer:

 1, III, and v 

Explanation:

The will be repulsion of magnetic field at that region since the direction of magnetic field is perpendicular to the direction of current.

In regions symmetrically located between two circular wire loops with current flowing in opposite directions, it is possible for the net magnetic field to be zero.

The question involves finding the regions where the net magnetic field could be equal to zero when two circular metal wire loops each carry the same current I. According to physics, particularly the study of magnetism and Ampere's Law, the magnetic field around a current-carrying wire forms concentric circles. If two such loops carry current in the same direction, their magnetic fields at a point between them will add together. Contrarily, if the loops carry currents in opposite directions, the magnetic fields may cancel each other out at some point between them, resulting in a net magnetic field of zero.

Such a scenario is depicted in the provided example where two loops are shown with their respective magnetic fields acting in opposite directions at point P, yielding a net magnetic field of zero. Therefore, to answer the student's question, it is likely that the net magnetic field could be zero in a region that lies symmetrically between the two loops if the currents are flowing in opposite directions.

Q.1

Answer . Momentum = mass x velocity

               Momentum/mass = velocity

               5/0.8 = velocity

               6.25 m/s = velocity

Q.2

Answer . F = ma => a = f/m => a = 7/3.2 => a = 2.1875m/s²

The velocity of a 0.8 kg kitten with a forward momentum of 5 kg*m/s is 6.25 m/s. The acceleration of a 3.2 kg model airplane with a net forward force of 7 N is 2.1875 m/s².

To calculate the velocity of a kitten with a given momentum, we use the formula p = m * v, where p is the momentum, m is the mass, and v is the velocity. Thus, the velocity v can be calculated by rearranging the formula to v = p / m. Given a momentum of 5 kg*m/s and a mass of 0.8 kg, the kitten's velocity is v = 5 kg*m/s ÷ 0.8 kg = 6.25 m/s.

For the acceleration of the model airplane, we use Newton's second law of motion, which is F = m * a, where F is the net force, m is the mass, and a is the acceleration. With a net force of 7 N and a mass of 3.2 kg, the acceleration is a = F / m = 7 N ÷ 3.2 kg = 2.1875 m/s².

Answer:

Quick maths

First you find the fafarick and the lalickc and the caprisum and the joinnt

Answer:

b. Conservation of charges

Explanation:

Answer:[tex]6.309\times 10^{12}[/tex]

Explanation:

Given

Intensity level of rock concert [tex]=130\dB[/tex]

Intensity level of Whisper [tex]=2\dB[/tex]

Intensity of sound is given by

[tex]I=10\log _{10}(\frac{I}{I_o})[/tex]

where [tex]I_o=10^{-12}\ watts/m^2[/tex]

and difference in the intensity of the two sounds is [tex]db=130-2=128\ dB[/tex]

and

[tex]db=10\log _{10} (\frac{I_1}{I_2})[/tex]

[tex]12.8=\log _{10}(\frac{I_1}{I_2})[/tex]

[tex]\frac{I_1}{I_2}=10^{12.8}[/tex]

[tex]\frac{I_1}{I_2}=6.309\times 10^{12}[/tex]

Thus intensity of Rock concert is  [tex]6.309\times 10^{12}[/tex] times louder than that of a whisper

Final answer:

If the current at a certain point is 2.0 A, then 20 C of charge flow past that point in 10 seconds, as current is the flow of charge per unit time.

Explanation:

The solution goes as follows: If the current at a certain point is 2.0 A, then the amount of charge that flows past that point in 10 seconds can be calculated using the relationship between current (I), charge (Q), and time (t), which is given by the formula I = Q/t. Therefore, to find the charge, Q, we rearrange the formula to Q = It. Plugging in the given values, we get Q = 2.0 A × 10 s = 20 C. This means that 20 coulombs of charge flow past the point in 10 seconds.

Answer:

acceleration is the rate of change of velocity

Answer: P.E = MPH

Explanation: given that

Mass = M

Height = H

Gravitational acceleration = p

The relationship between the potential energy of a pendulum and all these values will be

P.E = MPH

Correct option is B. The efficiency of the machine is 25%, determined by dividing the work output (500 J) by the work input (2000 J) and then multiplying by 100 to get the percentage.

The efficiency of a machine is defined as the ratio of the work output to the work input, often expressed as a percentage. In this case, Carlota does 2000 J of work on the machine, and the machine does 500 J of work. To find the efficiency, we use the formula:

Efficiency (%) = (Work Output / Work Input) x 100

So, the calculation would be:

Efficiency (%) = (500 J / 2000 J) x 100 = 25%

The correct answer is B. 25%.

Answer:

its A

Explanation:

A black horizontal line intersected at right angles by a dotted orange line labeled Normal. Therefore, the correct option is option A.

Refraction in physics is indeed the redirection of a wave as it travels through one medium and then another. A change inside the medium or a change inside the wave's speed might both result in the redirection. Although refraction of light waves is the most often seen phenomena, refraction may also occur with sound waves as well as water waves.

The wave speed change and the initial wave propagation direction in relation to the wave speed change both affect the extent to which a wave is refracted. A black horizontal line intersected at right angles by a dotted orange line labeled Normal. This shows a light ray moving from a more dense into a less dense medium.

Therefore, the correct option is option A.

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Answer:

potential energy is energy that is being stored that is going to go into motion. Hope that helps a little

Explanation:

Answer:

Potential energy is the stored energy in an object.

Explanation:

When a roller coaster is going up it is gaining potential energy. When the roller coaster is at the highest point it has the most potential energy, stored energy.

Answer:

2) Signal #2 is a digital signal that transmits signals in segments/intervals.

Explanation:

Signals are form of information propagating from the source to a display unit for appropriate interpretation. It can be either in a digital or analogue form.

A digital signal is a definite signal which is discrete in time and amplitude. It is mostly in the form of codes obtained from set of values. Graphically it transmits in the form of 1 and 0, showing a point of maximum amplitude (1) and minimum amplitude (0).

Analog signal is continuous signal describing the variation of two variables with respect to time.

Answer:

Work output is less than work input.

Explanation:

Work output can never be greater than work input. Machines allow force to be applied over a greater distance, which means that less force will be needed for the same amount of work. When a machine changes the size of the force, the distance through which the force is exerted must also change.

Brainliest???

Answer:

Constant speed is your answer.

Explanation:

Answer:b

Explanation:

Thumb rule show the direction of force due to 90 degree angle.

Answer:

D. absolute magnitude and apparent magnitude

Absolute magnitude and apparent magnitude are the pairs of terms

directly relates to the actual brightness of a star.

Star brightness can be viewed in two ways and they include

Apparent magnitude refers to the how the brightness of the star is viewed

from the Earth while absolute magnitude refers to how the stars are viewed

from a standard distance of 32.6 light-years, or 10 parsecs.

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Answer:

11 ohms

Explanation:

V=IR

110=10xR

R=11 ohms

Explanation:

v=IR

110=10R

R=11

resistance of the hair dryer=11

Collect the water sample in a glass tumbler and then put a straw in the water. Record the bending in the straw using a protractor and the angle is the answer required

Answer:

1) car travel faster on the higher track

2) shorter

3) 0.56m/s

Explanation:

Answer:

the answer is 12

Explanation:

the answer is 12 because u have to think about 5 times 12 which would look like this: 5 x 12 = 60 would have to divide 60 from 5 like it says in the question.

Answer:

A horse is running at 12m/s accelerated to 38m/s in 10 seconds. What is the horses acceleration.

2.6m/s^2

When a  horse is running at 12 m/s accelerated to 38 m/s in 10 seconds, the horse's acceleration is 2.6 m/s².

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions. Acceleration is a vector quantity since it has both a magnitude and a direction.

Initial speed of the horse = 12 m/s.

Final speed of the horse = 38 m/s.

Time interval = 10 seconds.

Hence,  the horse's acceleration is = change in speed/time interval

= (final speed - initial speed)/time interval

= ( 38 m/s - 12 m/s)/10 s

= 26/10 m/s²

= 2.6 m/s².

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The incorrect statement that does not support the law of conservation of energy is when the ball hits the wall, it compresses and transforms its kinetic energy to potential energy.

The correct statement that does not support the law of conservation of energy is D. When the ball hits the wall, it compresses, transforming its kinetic energy to potential energy. According to the law of conservation of energy, energy cannot be created or destroyed, only transferred or transformed. Therefore, when the ball hits the wall, its kinetic energy is not transformed into potential energy, but rather into other forms of energy such as sound and heat.

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The hypothesis for a research study on sleep and student achievement would be that the amount of sleep a student gets affects student achievement. Option D. is correct.

The hypothesis for a research study on sleep and student achievement would be D. The amount of sleep a student gets affects student achievement. This hypothesis suggests that the amount of sleep a student gets has an impact on their academic performance.

To support this hypothesis, the study would collect data on students' sleep duration and analyze their academic achievements, looking for any correlation between the two.

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Choice-B is correct, but only halfway. This weird drawing appears to show TWO waves travelling through the same medium.

-- The big wavy line is a transverse wave, with amplitude=30cm and wavelength=110cm.

-- The short vertical lines are placed where the medium is squished, with thin spread out regions between them. This is a longitudinal wave, with amplitude=5cm and wavelength=10cm.

This could be the picture of a sound wave zipping along through the top of a train of 30cm waves on the lake.

The order of the sounds made by these sources from highest to lowest pitch is motorcycle, telephone, piano, lawn mower. So, the third option is correct.

Pitch of a sound is defined as the characteristic of sound that helps us to sense the shrillness of a sound according to the frequency of vibration of the sound.

Here,

The various instruments given are considered as some sources of sound. Among them, the motorcycle is the sound source having the highest pitch.

Then comes the telephone that has second highest pitch.

The sound source that has the third highest pitch is the piano.

Among all the instruments, the lawn mower have the least pitch.

Hence,

The order of the sounds made by these sources from highest to lowest pitch is motorcycle, telephone, piano, lawn mower.

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Explanation:

We have,

Force acting on the mass is 310 N

Mass, m = 120 kg

Distance covered by the mass is 30 m

Time, t = 3 s

(a) The work done on the mass is given by the product of force and displacement such that,

[tex]W=Fd\\\\W=310\times 30\\\\W=9300\ J[/tex]

(b) The rate at which the work is done is called power developed. Its formula is given by :

[tex]P=\dfrac{W}{t}\\\\P=\dfrac{9300}{3}\\\\P=3100\ W[/tex]