You throw a small ball upward and notice the time it takes to come back. If you then throw the same ball so that it takes twice as much time to come back, what is true about the motion of the ball the second time?(a) Its initial speed was twice the speed in the first experiment.(b) It traveled an upward distance that is twice the distance of the original toss.(c) It had twice as much acceleration on the way up as it did the first time.(d) The ball stopped at the highest point and had zero acceleration at that point.

The order of net coulombic measurement of the amount is (4) > (3) > (1) > (2) .

The Many Kinds of Electric Forces Electromagnetic forces can be divided into two categories: attractive electromagnetic forces and repellent electrical forces. Related crimes repel each other whereas opposite charges attract one another.

(1)   Net charge density force on charge q: magnitude  = kQq / R2  +  2 kQq cos(theta) / R2

                                                                   = k Q q ( 1 + 2 cos(theta) ) / R2

(2)   Net charge density force on charge q: magnitude = kQq / R2  +  2 kQq cos(theta) / (R/cos(theta))^2

                                                                = k Q q ( 1 + 2 cos3(theta) ) / R2

(3) Net charge density force on charge q: magnitude =  3 kQq / R2

(4)Net charge density force on charge q: magnitude=  kQq / (R/2)^2  = 4 kQq / R2

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Answer:

The correct answer is D. solids and liquids because their particles are arranged more closely together.

Answer:

study of force and motion

The cat travels with an average speed to the right of 0.179 m/s.

Simply add up the squares of the other two coordinates to determine the distance between any point and an axis, and then square root the result. We square the y- and z-coordinates, discover their sum, and then square root our result to determine the distance from the x-axis.

The total time elapsed is the sum of the time to run from A to B and the time to run from B to C, which is:

total time = 20.0 s + 8.00 s = 28.0 s

The average velocity is defined as the displacement divided by the elapsed time, so we have:

average velocity = displacement / elapsed time

average velocity = 5.00 m / 28.0 s

average velocity = 0.179 m/s.

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The mistakes in the results include options (v) and (vii) which do not follow the five golden rules for reporting results.

The five golden rules for reporting results are:

Using these rules, identify the mistakes in the given results as:

(v) 97.1 × 10³ ± 276Ω - The uncertainty is reported to an inappropriate number of significant figures and the units are not consistent.

(vii) 98.6 × 10³ ± 3 × 10^(-Q) - The uncertainty is not reported to the same number of decimal places as the measured value, and the units are not consistent.

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Answer:

i kinda dnt knw srry wanted the points for the answer

Explanation:

Answer:

convection currents

Explanation:

Answer:

The lithosphere is divided into huge slabs called tectonic plates. The heat from the mantle makes the rocks at the bottom of lithosphere slightly soft.

Explanation:

The Earth's lithosphere is broken into many small and large slabs of rock that are known as tectonic plates.

Earth is divided into four parts :

Lithosphere is the rigid and rocky outer portion of earth's surface. It consists of crust and upper mantle.

Asthenosphere is mostly found in the uppermost mantle of earth. It is weak in nature. Hot molten magma comes out from here.

Our earth is broken into 7 major and some minor plates.

7 Major Plates are :

Minor Plates are :

Hence, our lithosphere is divided into many small and large slabs of rock, and they are known as tectonic plates.

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Answer:

btw ....there r 4 images pls slide and view the answer

1. Filter absorbs all colors of white light.

2. The light that has passed through a filter, is always dim.

The filter selectively transmits the red and blue portions of the incident white light spectrum, but absorbs most of the green wavelength.

Color filters absorb certain wavelengths of color and transmit the other wavelengths allowing them to be seen.

Therefore in conclusion, the right filter can reduce glare, increase contrast, and make lunar features pop.

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Answer:

The answer is below

Explanation:

Given that the mass of the sculpture (m) = 6.2 kg, \(\theta_1=12.67^o,\theta_2=16.15^o\)

\(Sum\ of\ horizontal\ force\ is\ zero\ hence:\\\\T_1cos(\theta_1)=T_2cos(\theta_2)\\\\T_1=\frac{T_2cos(\theta_2)}{cos(\theta_1)}\\ \\Sum\ of\ vertical\ force\ is\ zero:\\\\T_1sin(\theta_1)+T_2sin(\theta_2)=mg\\\\\frac{T_2cos(\theta_2)}{cos(\theta_1)}sin(\theta_1)+T_2sin(\theta_2)=mg\\\\T_2=\frac{mg}{\frac{cos(\theta_2)}{cos(\theta_1)}sin(\theta_1)+sin\theta_2} \\\\T_2=\frac{6.2*9.81}{\frac{cos(16.15)}{cos(12.67)}sin(12.67)+sin16.15} =123.1\ N\\\\\)

\(T_1=\frac{T_2cos(\theta_2)}{cos(\theta_1)}=121.2\ N\)

Explanation:

arn core concepts.

See Answer

1) For a P wave with velocity of 8 km/s (typical upper mantle speed) in a Poisson solid,compute the wavelength for waves with periods of:

a) 15 sec

b) 1 sec

c) 0.1 sec (100 Hz)

2) Repeat question 2 for an S wave in the same medium (Hint: you have to determine the S wave speed).

Answer:

the particle is at coordinates (18,15/2)

Explanation:

To find the acceleration of the particle, we can use the formula for velocity: v = v0 + at, where v0 is the initial velocity, a is the acceleration, and t is the time. Since we know the initial and final velocities, as well as the time interval, we can solve for the acceleration:

a = (v - v0)/t = [(9i + 7j) - (3i - 2j)]/3 = (6i + 9j)/3 = 2i + 3j

So the acceleration of the particle is a = 2i + 3j m/s².

To find the coordinates of the particle at t=3s, we can use the formula for position: r = r0 + v0t + 1/2at², where r0 is the initial position. Since the particle starts at the origin, r0 = 0. Plugging in the values we have:

r = 0 + (3i - 2j)(3) + 1/2(2i + 3j)(3)² = 9i - 6j + 9i + 27/2 j = 18i + 15/2 j

We can use the kinematic equations of motion to solve this problem.

Let the acceleration of the particle be a = axî + ayj.

(a) Using the equation of motion v = u + at, where u is the initial velocity:

f = v = u + at

Substituting the given values, we get:

(91+7j) = (3î-2j) + a(3î + 3j)

Equating the real and imaginary parts, we get:

91 = 3a + 3a (coefficients of î are equated)

7 = -2a + 3a (coefficients of j are equated)

Solving these equations simultaneously, we get:

a = î(23/6) + j(1/2)

So the acceleration of the particle is a = (23/6)î + (1/2)j.

(b) Using the equation of motion s = ut + (1/2)at^2, where s is the displacement and u is the initial velocity:

At t = 3s, the displacement of the particle is:

s = ut + (1/2)at^2

Substituting the given values, we get:

s = (3î-2j)(3) + (1/2)(23/6)î(3)^2 + (1/2)(1/2)j(3)^2

Simplifying, we get:

s = 9î + (17/2)j

So the coordinates of the particle at t=3s are (9, 17/2).

A parallel circuit is an electrical circuit with more than one current path and all circuit components are connected between the same two sets of electrically common points. The current supplied by the source in a parallel circuit is equal to the sum of all branch currents in the circuit.

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From conservation of linear momentum, the magnitude of the forward velocity of the male skater is 2.31 m/s

Momentum can simply be defined as a product of mass and velocity. It is a vector quantity.

Given that a 64 kg male ice skater is facing a 41 kg female ice skater. They are at rest on the ice. They push off each other and move in opposite directions. The female skater moves backwards with a speed of 3.6 m/s.

According to Newton's third law, in any action, there will be equal and opposite reaction.

The velocity of the male skater can be known from the conservation of linear momentum. That is

MV = mu

Where

Substitute all the parameters into the formula

64 × V = 41 × 3.6

V = 147.6 / 64

V = 2.31 m/s

Therefore, the velocity of the male skater is 2.31 m/s in the opposite direction.

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Neither Technician A nor Technician B is correct about the

statements they made.

This is referred to as an interface between radio waves and

helps in their propagation through currents moving in metal

conductors. It is mostly used with a transmitter or receiver for

an excellent output.

If an antenna is defective, it can't receive any type of signal If

the resistance is greater than zero then it means the antenna is

defective which is why neither of the technicians are correct.

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Answer:

What is Bohr’s Model of an Atom?

The Bohr model of the atom was proposed by Neil Bohr in 1915. It came into existence with the modification of Rutherford’s model of an atom. Rutherford’s model introduced the nuclear model of an atom, in which he explained that a nucleus (positively charged) is surrounded by negatively charged electrons.

Answer:

Explanation:

individual and then net

hope that helps I could be wrong about this one though

Both the advantage and the disadvantage of the radio wave is true.

Radio waves are electromagnetic waves that have frequencies lower than microwaves. The wavelengths of radio waves range from tens of thousands of mete to thirty centimeters.

Straight-line radio-wave communication signals move through the atmosphere, refract off of clouds or the ionosphere, or are transmitted by satellites in space. They are used in conventional broadcast radio and television, shortwave radio, navigation and air traffic control, cellular telephony, and even remote-controlled toys.

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Answer:

1.477seconds

Explanation:

The height of the stone thrown in air after t secs is expressed by the equation;

H(t) = (63t − 16t²) feet

Velocity is the change in displacement of the body with respect to time.

V(t) = d(H(t))/dt

V(t) = 63 - 32t

To get the time t when the ball will be traveling upward at 15.75 feet per second, we will substitute V(t) = 15.75 into the resulting equation as shown;

15.75 = 63 - 32t

-32t = 15.75-63

-32t = -47.25

t = 47.25/32

t = 1.477seconds

Hence the ball will be travelling upward when t is 1.477s

Answer:

The motion of the object between 0 and 8 seconds, as represented by the graph above, can be broken down into four segments:

For the first 4 seconds, the object experiences an increased velocity. This means that the object is accelerating downwards due to the force of gravity. During this time, the velocity increases at a constant rate of 9.8 m/s^2.

Between 4 and 6 seconds, the object experiences a constant velocity. This means that the object continues to fall with a steady speed, without any further increase in its velocity.

Between 6 and 7 seconds, the object again experiences a constant velocity. This means that the object continues to fall with the same steady speed as before.

Finally, between 7 and 8 seconds, the object experiences a decreased velocity. This means that the object is decelerating, or slowing down, as it approaches the ground. This could be due to air resistance or other factors.

So, to summarize, the motion of the object between 0 and 8 seconds is characterized by an initial increase in velocity for 4 seconds, followed by two periods of constant velocity for 2 seconds and 1 second respectively, and finally a decrease in velocity for 1 second.

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Answer:

C the metal handle because it is a good conductor

Answer:

D.

Explanation:

Although the metal handle will last longer, if heated up enough it could burn her hand.

Answer:

3rd class lever

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The class of lever that should be given in the attached image is to be considered the third-class lever.

In a Class Three Lever, the Force should be lies between the Load and the Fulcrum. In the case when the Force is closer to the Load, it should be easier to lift and there is a mechanical advantage.

So based on this, we can say that The class of leer that should be given in the attached image is to be considered as the third-class lever.

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We can see here that the diagram that reveals the absorption of photons and production of electrons (photoelectric effect) used in solar PV systems is seen below.

A photon is a fundamental particle or quantum of light.

It is the smallest indivisible unit of electromagnetic radiation, which also includes radio waves, microwaves, X-rays, visible light, ultraviolet light, and infrared radiation. In scientific calculations, photons are represented by the symbol "c" and move at the speed of light in a vacuum while carrying energy.

Wave-particle duality is the idea that photons are both particles and have wave-like characteristics. This means that they can exhibit wave-like properties like interference and diffraction as well as discrete particle behavior, each with a distinct energy and momentum.

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Explanation:

Calculating this according to the m/s rate

Now solving the question

If the car goes 20 m/s mathematically we can generate it as

15 × 60 = 600 secs

If the car goes 20 meters per every second it means

The car will go 20 meters for 900 secs

Which is 900 ×20 = 18000m/s

=18000÷1000 = 1km

Therefore the answer is 18km

Hi there!

Using Faraday's and Lenz's Law:
\(\epsilon = -N\frac{d\Phi_B}{dt}\)

ε = Induced emf (V)

N = number of loops/turns
Φ = Magnetic flux (Wb)

Magnetic flux is given as:
\(\Phi_B = \oint B \cdot dA = B\cdot A\)
Since the area of the loops remains constant, we can take area out of the time derivative. Thus:
\(\frac{d\Phi_B}{dt} = A * \frac{dB}{dt} = A * \frac{\Delta B}{\Delta t}\)

Also, since the magnetic field is applied at a right angle to the plane of the coil, that means that the field is PARALLEL to the area vector of the plane of the coil. (points normal to the surface). This means we can disregard the dot product since cos(180) = 1.

Plug in the given values.

\(\epsilon = - 50 * 3.6 * \frac{0.88 - 0}{1.85} = -85.622 V\)

The negative sign simply means that the induced emf is in the opposite direction in order to oppose the increase in magnetic flux, so the magnitude is simply:

\(\epsilon = \boxed{85.622 V}\)

For the current, we can use Ohm's Law:
\(i = \frac{\epsilon}{R}\\\\i = \frac{85.622}{5} = \boxed{17.124 A}\)

Between Kinetic energy and speed: The relationship is quadratic or parabolic. According to the kinetic energy formula, KE = 1/2 mv^2, the kinetic energy is proportional to the square of the speed.

Between potential energy and mass: The relationship is linear. The potential energy is directly proportional to the mass. In simple cases, the potential energy is given by PE = mgh, where mass (m) and height (h) are directly proportional.

Between pressure and volume: The relationship is inverse. According to Boyle's law, the pressure and volume of a gas are inversely proportional when temperature is constant. Mathematically, P1V1 = P2V2.

Between pressure and temperature: The relationship is linear. According to Charles's law, the pressure and temperature of a gas are directly proportional when volume is constant. Mathematically, P1/T1 = P2/T2.

Between displacement and velocity: The relationship is linear. Velocity is the rate of change of displacement with respect to time, so the two are directly proportional.

The flux through the circle loop of wire is determined as 7.96 N/C.m².

The flux through the circle loop of wire is calculated by applying the following formula.

Ф = EA cosθ

where;

The area of the wire is calculated as follows;

A = πr²

A = π (2 m)²

A = 12.57 m²

The flux through the circle loop of wire is calculated as;

Ф = EA cosθ

Ф = 1.5 x 12.57 x cos (65)

Ф = 7.96 N/C.m²

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