help me please!!!!!..............

Answer:

Vector

Explanat

Vector is the only right answer in the situatuin

Answer:

D. By comparing traits

Explanation:

Because age isn't genetic, as well as names, as well as who discovered, but traits are genetic.  

Answer:

D

Explanation:

Answer:

ΔU = 5.21 × 10^(10) J

Explanation:

We are given;

Mass of object; m = 1040 kg

To solve this, we will use the formula for potential energy which is;

U = -GMm/r

But we are told we want to move the object from the Earth's surface to an altitude four times the Earth's radius.

Thus;

ΔU = -GMm((1/r_f) - (1/r_i))

Where;

M is mass of earth = 5.98 × 10^(24) kg

r_f is final radius

r_i is initial radius

G is gravitational constant = 6.67 × 10^(-11) N.m²/kg²

Since, it's moving to altitude four times the Earth's radius, it means that;

r_i = R_e

r_f = R_e + 4R_e = 5R_e

Where R_e is radius of earth = 6371 × 10³ m

Thus;

ΔU = -6.67 × 10^(-11) × 5.98 × 10^(24)

× 1040((1/(5 × 6371 × 10³)) - (1/(6371 × 10³))

ΔU = 5.21 × 10^(10) J

Answer:

The answer is 20J

Explanation:

Answer:

Excessive paranoia, worry, or anxiety.

Long-lasting sadness or irritability.

Extreme changes in moods.

Social withdrawal.

Dramatic changes in eating or sleeping patter

Explanation:

hope it helps brainliest if right thx :)

Answer:

10

Explanation:

Givens

vi = 20 m/s

vf = 60 m/s

t = 4 second.

Formula

a = (vf - vi) / t

a = (60 - 20)/4

a = 40 / 4

a = 10 m/s^2

Answer:

The mass of an object is the same on Earth, in orbit, or on the surface of the Moon. ... the absence of air resistance, all objects fall with the same acceleration g. ... A 1.0-kg mass thus has a weight of 9.8 N on Earth and only about 1.7 N ... What force does he apply if the stone accelerates at a rate of 1.5m/s2?

Explanation:

Answer:

it is absorbed or reflected by the atmosphere

Explanation:

In the case when approx 50% only of the solar energy would be directed towards earth and it would be penetrates directly to the surface so the rest or remaining of the radiation would be either absorbed or refected by the atmosphere

So as per the given situation the above represent the answer

hence, the same is to be considered and relevant

Answer:

2,158.8 mi?

Explanation:

sorry if this is wrong

Answer : Convection is a major factor in weather. The sun heats the earth's surface, then, when cooler air comes into contact with it, the air warms and rises, creating an upward current in the atmosphere. That current can result in wind, clouds, or other weather.

Explanation:

In the atmosphere convection happens when warm air on the ground rises into the atmosphere(clouds) and at the high altitudes the air becomes cold  causing the air to come back down to the surface.

Answer:

(i) The speed of the whistle is 16.[tex]\overline 3[/tex] m/s

(ii) The lowest note heard by the person is 3,818.[tex]\overline{18}[/tex] Hz

(iii) The time taken for the whistle to make one revolution is approximately 0.38468 seconds

(iv) The time interval between the person hearing the highest and lowest note is approximately 0.19234 seconds

Explanation:

The question relates to the Doppler effect for which the change in frequency is given as follows;

[tex]f_L = \left ( \dfrac{v \pm v_L }{v \pm v_S} \right ) \cdot f_S[/tex]

Where;

[tex]f_L[/tex] = The frequency heard by the listener

v = The speed of sound in air = 343 m/s

[tex]v_L[/tex] = The listener's speed

[tex]v_S[/tex] = The source's (whistle) speed

[tex]f_S[/tex] = The frequency of the source

The given parameters are;

The frequency of the whistle (source), [tex]f_S[/tex] = 4 kHz = 4,000 Hz

The radius of the horizontal circle around which the whistle is whirled = 1 m

The highest note heard by a person a large distance away = 4200 Hz

The distant listener is taken as stationary, [tex]v_L[/tex] = 0 m/s

We therefore have;

[tex]f_L = \left ( \dfrac{v \pm 0 }{v \pm v_S} \right ) \cdot f_S = \left ( \dfrac{v }{v \pm v_S} \right ) \cdot f_S[/tex]

(i) When the whistle's motion while it is being whirled towards the listener, [tex]v_S[/tex] is negative

When the whistle's motion while it is being whirled is away from listener, [tex]v_S[/tex] is positive

The highest note, [tex]f_{LH}[/tex], is obtained with the lowest denominator, that is when the source moves towards the listener and [tex]v_S[/tex] is negative, we get;

[tex]f_{LH} = 4,200 \ Hz = \left ( \dfrac{343 \ m/s }{343 \ m/s - v_S} \right ) \times 4,000 \ Hz[/tex]

[tex]\dfrac{4,200 \ Hz}{4,000 \ Hz} = \dfrac{21}{20} = \dfrac{343 \ m/s}{343 \ m/s - v_S}[/tex]

21·(343 m/s - [tex]v_S[/tex]) = 20×343 m/s

21 × [tex]v_S[/tex] = 21 × 343 m/s - 20 × 343 m/s = 343 m/s

[tex]v_S[/tex] = (343 m/s)/21 = 49/3 m/s = 16.[tex]\overline 3[/tex] m/s

The speed of the source = The speed of the whistle

∴ The speed of the source = [tex]v_S[/tex] = 16.[tex]\overline 3[/tex] m/s = The speed of the whistle

(ii) The lowest note heard by the person occurs when the denominator of the formula for the change in frequency is smallest for which we have the value of [tex]v_S[/tex] as positive and the source moves away from the observer which is presented as follows;

[tex]f_{LH} = \left ( \dfrac{343 \ m/s }{343 \ m/s +16.\overline 3 \ m/s } \right ) \times 4,000 \ Hz = 3,818.\overline {18} \ Hz[/tex]

The lowest note heard by the person = 3,818.[tex]\overline{18}[/tex] Hz

(iii) The angular velocity of the whistle, ω is given as follows;

[tex]\omega = \dfrac{\theta}{t} = \dfrac{v_S}{r} = \dfrac{16. \overline 3 \ m/s}{1 \ m} = 16. \overline 3 \ radians/second[/tex]

The angle rotated in one revolution, is 2·π radians, therefore, when θ = 2·π radians, the time, [tex]t_c[/tex], to complete one revolution is given as follows;

[tex]t_c = \dfrac{\theta}{\omega} = \dfrac{2 \times \pi \ radians}{16. \overline 3 \ radians/second} \approx 0.385 \ seconds[/tex]

Therefore, the time to complete one revolution ≈ 0.38468 seconds

(iv) The time interval between the person hearing the highest and lowest note is the time to complete half a cycle ≈ 0.38468/2 seconds ≈ 0.19234 seconds.

Answer:

it is B. The Law of Conservation of Energy

Explanation:

hope this helps

Answer:

e4atetetsgts4tgesetse

Explanation:

ger54ttagcuit B, then the voltage in circuit A is less than the voltage in circuit B. Item 4 If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is less than the current in circuit B. If the current in circuit A is equal to the current in circuit B, then the voltage in circuit A is less than the voltage in circuit B. If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is equal to the current in circuit B. 0 Type here to search е c​

Answer:

V = 440I

Explanation:

According to ohm's law which states that the current passing through a metallic conductor at constant temperature is directly proportional to the potential difference across its ends.

Let V be the potential difference

I is the current

R is the resistance

Mathematically;

V∝I

V = IR

Given

Potential difference V = 5.50Volts

Current = 12.5mA = 12.5*10^-3A

Current  I = 0.0125A

Recall that V = IR

R = V/I

Substitute the given parameters into the formula;

R = 5.50/0.0125

R = 440 ohms

Hence the equation that links current, potential difference and resistance is expressed as;

V = I(440)

V = 440I

Answer:

downward by the book

Explanation:

because of gravity

Answer:

a person appears at a specified time and place and gives sworn testimony

Explanation:

Hope this helps

Answer:

a) [tex]v_{60^{o}} =4.98 m/s[/tex]

b) [tex]\theta_{max}=79.34^{o}[/tex]

Explanation:

This problem can be solved by doing an energy analysis on the given situation. So the very first thing we can do in order to solve this is to draw a diagram of the situation. (see attached picture)

So, in an energy analysis, basically you will always have the same amount of energy in any position of the pendulum. (This is in ideal conditions) So in this case:

[tex]K_{lowest}+U_{lowest}=K_{60^{o}}+U_{60^{0}}[/tex]

where K is the kinetic energy and U is the potential energy.

We know the potential energy at the lowest of its trajectory will be zero because it will have a relative height of zero. So the equation simplifies to:

[tex]K_{lowest}=K_{60^{o}}+U_{60^{0}}[/tex]

So now, we can substitute the respective equations for kinetic and potential energy so we get:

[tex]\frac{1}{2}mv_{lowest}^{2}=\frac{1}{2}mv_{60^{o}}^{2}+mgh_{60^{o}}[/tex]

we can divide both sides of the equation into the mass of the pendulum so we get:

[tex]\frac{1}{2}v_{lowest}^{2}=\frac{1}{2}v_{60^{o}}^{2}+gh_{60^{o}}[/tex]

and we can multiply both sides of the equation by 2 to get:

[tex]v_{lowest}^{2}=v_{60^{o}}^{2}+2gh_{60^{o}}[/tex]

so we can solve this for [tex]v_{60^{o}}[/tex]. So we get:

[tex]v_{60^{o}}=\sqrt{v_{lowest}^{2}-2gh_{60^{0}}}[/tex]

so we just need to find the height of the stone when the pendulum is at a 60 degree angle from the vertical. We can do this with the cos function. First, we find the vertical distance from the axis of the pendulum to the height of the stone when the angle is 60°. We will call this distance y. So:

[tex]cos \theta = \frac{y}{4m}[/tex]

so we solve for y to get:

[tex]y = 4cos \theta[/tex]

so we substitute the angle to get:

y=4cos 60°

y=2 m

so now we can find the height of the stone when the angle is 60°

[tex]h_{60^{o}}=4m-2m[/tex]

[tex]h_{60^{o}}=2m [/tex]

So now we can substitute the data in the velocity equation we got before:

[tex]v_{60^{o}}=\sqrt{v_{lowest}^{2}-2gh_{60^{0}}}[/tex]

[tex]v_{60^{o}} = \sqrt{(8 m/s)^{2}-2(9.81 m/s^{2})(2m)}[/tex]

so

[tex]v_{60^{o}}=4.98 m/s [/tex]

b) For part b, we can do an energy analysis again to figure out what the height of the stone is at its maximum height, so we get.

[tex]K_{lowest}+U_{lowest}=K_{max}+U_{max}[/tex]

In this case, we know that [tex]U_{lowest}[/tex] will be zero and [tex]K_{max}[/tex] will be zero as well since at the maximum point, the velocity will be zero.

So this simplifies our equation.

[tex]K_{lowest} =U_{max}[/tex]

And now we substitute for the respective kinetic energy and potential energy equations.

[tex]\frac{1}{2}mv_{lowest}^{2}=mgh_{max}[/tex]

again, we can divide both sides of the equation into the mass, so we get:

[tex]\frac{1}{2}v_{lowest}^{2}=gh_{max}[/tex]

and solve for the height:

[tex]h_{max}=\frac{v_{lowest}^{2}}{2g}[/tex]

and substitute:

[tex]h_{max}=\frac{(8m/s)^{2}}{2(9.81 m/s^{2})}[/tex]

to get:

[tex]h_{max}=3.26m[/tex]

This way we can find the distance between the axis and the maximum height to determine the angle of the pendulum about the vertical.

y=4-3.26 = 0.74m

next, we can use the cos function to find the max angle with the vertical.

[tex]cos \theta_{max}= \frac{0.74}{4}[/tex]

[tex]\theta_{max}=cos^{-1}(\frac{0.74}{4})[/tex]

so we get:

[tex]\theta_{max}=79.34^{o}[/tex]

The speed when the string is at 60 degrees to the vertical is approximately 8.85 m/s. The greatest angle with the vertical that the string will make is approximately 57.6 degrees.

(a) To find the speed when the string is at 60 degrees to the vertical, we can apply the conservation of mechanical energy between the lowest point (initial position) and the 60 degrees point (final position).

At the lowest point, all of the gravitational potential energy is converted into kinetic energy:

m × g × h = (1/2) × m × v²

v = √(2 × g × h) = √(2 × 9.8 × 4.0) ≈ 8.85 m/s.

Therefore, the speed when the string is at 60 degrees to the vertical is approximately 8.85 m/s.

(b) The greatest angle with the vertical that the string will make, we need to determine the maximum height reached by the stone. At the highest point, all of the kinetic energy is converted into gravitational potential energy:

(1/2) × m × v² = m × g  h(max)

h(max) = (v²) / (2 × g) = (8.0²) / (2 × 9.8) ≈ 3.27 m.

Using the sine function:

sin(Θ) = h(max) / 4.0,

Θ = sin⁻¹(h(max) / 4.0) ≈ sin⁻¹(3.27 / 4.0) ≈ 57.6 degrees.

Therefore, the greatest angle with the vertical that the string will make is approximately 57.6 degrees.

To know more about potential energy:

https://brainly.com/question/24284560

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Answer:

Explanation:

there could be earthquakes or the tectonic plates under can make it fall apart,  natural disasters

hope this helps!!

Maps can convey a lot of different types of information. They can tell you where you are or they can tell you something about a location. Earth scientists often use maps that have coordinates so that they can locate themselves or the features they are interested in. Different types of maps show different things well. For example, some types of maps show the tropical areas really well but do a terrible job depicting the polar regions.

Answer:

3 x 10⁻⁴m

Explanation:

Given parameters:

Speed of light  = 300000km/s

Frequency  = 1000gigahz  = 1000 x 10⁹Hz

Unknown:

Wavelength = ?

Solution:

To solve this problem, we use the expression below:

    V  = F ∧  

V is the speed

F is the frequency

∧ is the wavelength

      300000 = 1000 x 10⁹ x   ∧  

Wavelength  = 3 x 10⁻⁷km = 3 x 10⁻⁴m

Answer:

it will more and change direction

Explanation:

because the resultant force (R) is not equal zero so may be there is a force greater than the other one and the ball will more in the direction of greater force.

and it can't be remain stationary because R=! 0 .

Answer:

OC, The Tariff of Abominations caused conflicts between the North and the South regarding their sectional interests.

Explanation:

The Tariff of Abominations did cause conflicts because it widened income inequality since it favored the rich upper class while burdening the lower class. The South was the lower class, and the North was more of the upper class.

Answer:

It indicates that a force has 2 directions at the point at which they cross

Answer:

A. A field pointing in two directions

Answer:

Momentum of car = 1200 kg * 10 m/s = 12000 kgm/s Momentum = Force * time 12000 kgm/s = Force * 20s Force = 600 N

Explanation:

Answer:

His inertia increases.

Explanation:

Inertia is defined as the force which keeps stationary objects to stay still (remain at rest) or moving objects in motion at the same speed and in the same direction unless it is stopped by an external force. It can also be defined as the resistance of an object to resist change by remaining in its state of rest or in motion. Therefore, his inertia increases.