A net force F accelerates a mass m with an

acceleration a. If the same net force is applied

to mass 2m, then the acceleration will be

A) 4a.

B) a/2.

C) a/4.

D) 2a.

The average velocity in the first 45 seconds 3.11m/s and in the next 25 seconds is 3.6m/s and finally the average velocity for the entire trip is 3.28 m/s

The displacement of an object over time is its average velocity. We divide the distance traveled by the amount of time to determine an object's average speed. We are aware that velocity is a vector quantity, and that dividing displacement by time yields the average velocity.

1 ) 140 m to west in 45 seconds .

2 ) 90 m to east in 25 seconds .

The distance travelled by the balloon in first 45 s = 140 m

distance travelled by the balloon in next 25 s = 90 m

Total distance travelled by the balloon = 140 m + 90 m = 230 m

J ) average speed in first 45 s= distance in 45 s

= 140 ÷45 = 3.11 m /s

K ) average speed in next 25 s

distance in 25 s / 25

= 90÷ 25 = 3.6 m /s

L) average in entire trip

=  total distance / total time

= (140 + 90) ÷( 25 + 45 )

= 3.28 m /s

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Answer: D

Explanation: nuclear fission

Leucippus and Democritus were the first to postulate that matter was made up of tiny, unbreakable particles. These Greek philosophers proposed the idea that atoms, or atomic particles, were the fundamental building blocks of all matter.

Democritus proposed that the universe is made up of small, indivisible solid substances he termed "atom" 2,500 years ago. Democritus' "atoms" idea, however, was despised by other Greek philosophers because they thought it was nonsensical.

The first scientific theory to link chemical changes to the composition, characteristics, and behavior of the atom is Dalton's Atomic Theory. These are the main principles of this theory:

Since the discovery of radioactivity, the idea that atoms are unbreakable has been called into question. The fact that atoms can be divided into subatomic particles was discovered (such as protons, neutrons and electrons). Only in chemical reactions, where whole number ratios are used for reaction, are atoms indestructible.

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The decibel level of a sound having an intensity of 10⁻¹² W/m² is β = 0 dB

The SI unit of sound intensity is the W/m² but it is more better to measure it in decibels (dB), this is done using:

β = 10log(I/I₀)

Where I is the intensity, I₀ is the reference intensity = 10⁻¹² W/m²

For a sound with intensity of 10⁻¹² W/m²:

β = 10log( 10⁻¹²/ 10⁻¹²) = 0 dB

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To calculate the total charge on a finite sheet 0≤x≤1, 0≤y≤1 on the z=0 that has a charge density of rho s=xy(x 2+y 2+25) 2 3 n C/m 2. First, we need to use the formula Q=∫s ρs ds where ds=dx dy.  the total charge on the sheet is 111.31 nC.

Where ρs is the charge density and s is the surface area of the sheet. The surface area of the sheet is given by s=∫∫dx dy.

Therefore, Q=∫s ρs ds=∫∫ρs dx dy.

From the question, ρs=xy(x2+y2+25)^2/3

Therefore,

Q=∫∫x y(x2+y2+25)2/3dxdy = ∫01∫01xy(x2+y2+25)2/3dx dy

Separating out the terms containing y, we obtain;

Q=∫01ydy∫01x(x2+25)2/3dx + ∫01ydy∫01xy2(x2+25)2/3dx ∫01ydy∫01y(x2+y2+25)2/3dx

On integrating, we get;

Q =1/4 [(14+245)(5/3)+(14+245)(5/3)(2/5)+(14+245)(5/3)(2/5)]

=111.31 n C

Therefore, the total charge on the sheet is 111.31 nC.

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Global Positioning System (GPS) is a satellite-based tracking system that enables users to determine a person's position.

This system is used to locate and track the movements of individuals, vehicles, and assets around the world. GPS technology works by utilizing a network of satellites orbiting the Earth that send signals to GPS receivers on the ground. These receivers interpret the signals and calculate the user's precise location, speed, and direction.

GPS technology has a wide range of applications, including navigation, tracking, and mapping. GPS tracking is particularly useful in fleet management, logistics, and emergency response situations. Law enforcement agencies also use GPS technology to monitor the movements of individuals who are under surveillance or subject to electronic monitoring.

GPS technology has revolutionized the way people navigate and interact with the world around them. It has made it easier for individuals to find their way around unfamiliar places and has improved the efficiency and safety of many industries. The widespread availability of GPS technology has also led to the development of new applications and services that make use of location data, such as geotagging and location-based advertising. Overall, GPS technology has had a significant impact on society and will continue to play an important role in shaping the future.

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Answer: last one radio waves

Or d

Explanation:

Answer:

infrared

Explanation:

ed2020

Answer:

current must flow and chemical energy must take place

The resistance in the given series RL AC circuit with a 20.0 mH inductor and a phase angle of 20.0° at 1000 Hz is approximately 114.13 ohms.

In a series RL circuit, the impedance can be represented by the formula Z = √(\(R^2\) + \((\omega L)^2\)), where R is the resistance, ω is the angular frequency (2πf), and L is the inductance. The phase angle, θ, is given by the equation tan(θ) = ωL/R.

Given that the inductance, L, is 20.0 mH and the frequency, f, is 1000 Hz, we can calculate ω as follows:

ω = 2πf = 2π × 1000 = 2000π rad/s.

Let's substitute the values into the equation tan(θ) = ωL/R:

tan(20.0°) = (2000π × 20.0 × \(10^{-3}\)) / R.

Simplifying the equation, we get:

R = (2000π × 20.0 × \(10^{-3}\)) / tan(20.0°) ≈ 114.13 Ω.

Therefore, the resistance in the given circuit is approximately 114.13 ohms.

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Answer:

Cytokinesis occurs differently in animal and plant cells. In animal cells, the plasma membrane of the parent cell pinches inward along the cell's equator until two daughter cells form. In plant cells, a cell plate forms along the equator of the parent cell.

Explanation:

Answer:

direct current (DC) and alternating current (AC)

I'm not weather the answer is right or wrong....

False. A pneumoencephalography (peg) cannot be considered a more sophisticated version of positron emission tomography (pet)

Define pneumoencephalography

Pneumoencephalography is a diagnostic radiology procedure that creates head X-ray images after injecting air or gas between the membranes lining the brain and spinal cord to highlight the contours of distinct brain structures.

Positron emission tomography (PET) is a method for assessing physiological function by examining neurotransmitters, blood flow, metabolism, and radiolabeled medicines.

A PET scan can be used to detect cancerous tumor cells and to identify diseases like epilepsy. A vein is injected with a little quantity of radioactive glucose (a sugar). Wherever glucose is being used in the brain is visualized by the PET scanner as it rotates around the body.

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The net torque applied on the lever be 180 N-m.

The direction of torque is perpendicular to both force and axis of lever and it acts outwards.

The outcome would be a net moment (torque) of zero for any force at any position on the axis of rotation for which the torque is 180 N-m and directed in the opposite direction.

Torque is a unit of measurement for the force that can cause an item to revolve about an axis. Torque accelerates an object in an angular direction, much like force does in linear kinematics.

A torque is a vector quantity. The torque vector's direction is determined by the force acting on the axis.

Torque is defined mathematically as: force × perpendicular distance.

So, net torque applied on the lever :

= + (15N)×(20m) + (5N)×(15m) - (5N)×(5m) -(10N)×(17m)

= 180 N-m.

Additionally, torque works outward and has a direction that is perpendicular to both force and axis.

The outcome would be a net moment (torque) of zero for any force at any position on the axis of rotation for which the torque is 180 N-m and directed in the opposite direction.

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The unit vector in the direction of the given vector is [-1, 1/2].

A unit vector in the direction of the given vector [−56/105], we need to normalize the vector by dividing each component by its magnitude.

The magnitude of the vector [−56/105] can be calculated as:

|[-56/105]| = \(\sqrt {((-56/105)^2)\) = \(\sqrt {(3136/11025)\) =\(\sqrt {(56^2 / 105^2\)) = 56/105

Normalize the vector, we divide each component by the magnitude:

[-56/105] / (56/105) = [-56/105] * (105/56) = [-1, 1/2]

a unit vector, we divide each component of the vector by its magnitude.

Dividing [-56/105] by (56/105) yields [-56/105] * (105/56) = [-1, 1/2].

A unit vector in the direction of the given vector is [-1, 1/2]. This means that the vector [-1, 1/2] has the same direction as the original vector [-56/105], but its length or magnitude is equal to 1.

Unit vectors are useful as they represent only the direction of a vector, allowing for easy comparison and calculation without concerns for the vector's scale or magnitude.

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The gravitational force that two 100 kg persons exert on each other when standing 1 m apart is approximately 6.672 × \(10^{(-7)}\) N. Option D is the correct answer.

The gravitational force between two objects can be calculated using the formula:

F = G × (m1 × m2) / r²

Where:

F is the gravitational force

G is the gravitational constant (approximately 6.672 × \(10^{(-11)}\) N·m²/kg²)

m1 and m2 are the masses of the two objects (100 kg each in this case)

r is the distance between the centers of the two objects (1 m in this case)

Plugging in the values, we get:

F = (6.672 × \(10^{(-11)}\) N·m²/kg²) × (100 kg × 100 kg) / (1 m)²

Simplifying the calculation:

F = (6.672 × \(10^{(-11)}\) N·m²/kg²) × 10,000 kg² / 1 m²

F = (6.672 × \(10^{(-11)}\) N·m²) × 10,000

F = 6.672 × \(10^{(-7)}\) N

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So,  If the silica cyliner of the radiant wall heater is rated at 1.5 kw its temperature when operating is 1025.3 K

To estimate the operating temperature of the radiant wall heater, we need to use the equation for power radiated by the radiant wall heater.

The power radiated by the radiant wall heater is given by P = εσAT⁴ where

Since P = εσAT⁴

P = εσ(2πrh)T⁴

Making T subject of the formula, we have

T = ⁴√[P/εσ(2πrh)]

Since P = 1.5 kW = 1.5 × 10³ W

Substituting the values of the variables into the equation, we have

T = ⁴√[P/εσ(2πrh)]

T = ⁴√[1.5 × 10³ W/(1 × 6 × 10⁻⁸ W/m²-K⁴ × 2π × 6 × 10⁻³ m × 0.6 m)]

T = ⁴√[1.5 × 10³ W/(43.2π  × 10⁻¹¹ W/K⁴)]

T = ⁴√[1.5 × 10³ W/135.72  × 10⁻¹¹ W/K⁴)]

T = ⁴√[0.01105 × 10¹⁴ K⁴)]

T = ⁴√[1.105 × 10¹² K⁴)]

T = 1.0253 × 10³ K

T = 1025.3 K

So, If the silica cylinder of the radiant wall heater is rated at 1.5 kw its temperature when operating is 1025.3 K

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Answer: The answer is C.

Explanation:Just took the quiz

The statement about the relationship between rates of reaction and concentration of reactants true is reactions are slower when there is lower concentration of reactants.

The chemical reaction is the reaction between two reactants which led to the formation of products.

The products are substances which forms after reaction. The reactants are the substances which are original materials.

Oxygen is needed for the reactions that cause artifacts to decay in the ocean.

Some ancient shipwrecks have been well-preserved deep in the ocean.

Reviewing the information in the data table, we conclude that reactions are slower when there is lower concentration of reactants.

Thus, the correct option is C.

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According to the question, The electrostatic force is inversely related to the square of the separation distance.

Between two charges that are separated by a distance, there is an electrostatic force. The size of each charging and the separation between them determine the strength of the electrostatic force. Two charges that are either positive or negative when placed together repel one another.

Positively and negatively charges are known to interact with one another. The magnitude of the electrostatic force, however, serves as a gauge for the strength of all this interaction. The magnitude of the static electricity and the spacing between them both contribute to this force.

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Answer:

F = M ω^2 R     is the centripetal force on the ball

f = 7 / 10 = .70 / sec      revolutions / sec

ω = 2 pi f = 4.40 / sec

ah = F / m = 4.4^2 * 2 = 38.7 m/s^2

horizontal acceleration = 38.7 m/s^2

vertical acceleration = 9.80 m/s^2

a = (38.7^2 + 9.8^2)^1/2 = 39.9 m/s^2    total acceleration

Answer: depends on what your nervous about

Explanation:tell me what your nervous about

\(\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{0.7-0.3}{30}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{0.4}{30}\)

\(\\ \sf\longmapsto Acceleration=0.01m/s^2\)

Answer:

60.0m im sorry if im wrong but this is what i got

Explanation:

Answer:

The Answer Is 60 m

Explanation:

Distance d = ?

Time t = 15 s

Average speed vavg = 4.0 m/s

You can rearrange the equation vavg = d/t to solve for distance travelled d.

vavg = d/t

d = vavgt

= (4.0 m/s) (15s)

= 60 m

There are six different kinds of protons present in 1-chlorohexane, each corresponding to the six carbon atoms in the molecule.

Six different types of protons present are:

1. The proton on the chloro group (-Cl)

2. The proton on the first carbon atom adjacent to the chloro group (-CH2-Cl)

3. The proton on the second carbon atom adjacent to the chloro group (-CH2-CH2-Cl)

4. The proton on the third carbon atom adjacent to the chloro group (-CH2-CH2-CH2-Cl)

5. The proton on the fourth carbon atom adjacent to the chloro group (-CH2-CH2-CH2-CH2-Cl)

6. The proton on the sixth carbon atom at the end of the chain (-CH3)

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Answer:

The atomic weight

Explanation:

The property of isotopes that must be different is the atomic weight.

Isotopes are generally referred to as atoms of the same element with the same atomic number (proton number) but different neutron numbers.

Since the atomic weight of an atom is the sum of proton and neutron, atomsof the same element with different number of neutrons will definitely have different atomic weight.

Answer:

During an excursion or a reversal, the magnetic field is considerably weakened and allows many more cosmic rays to reach the surface of the planet. These energetic particles from space can be damaging to life on Earth if too many reach the surface.

Explanation:

Radio waves may generate astronomical bodies with fluctuating magnetic fields. A further explanation is below.

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Astronomers believe that the reason for the higher abundance of lithium in cosmic rays compared to the Sun and stars is due to cosmic ray spallation.

Cosmic rays, which are high-energy particles that originate from outside the Solar System, can interact with interstellar matter and break apart heavier elements into lighter ones, including lithium. Since the Sun and stars have much stronger magnetic fields and denser atmospheres than the vast regions of interstellar space where cosmic rays travel, they are not as susceptible to cosmic ray spallation. Therefore, the relatively low abundance of lithium in the Sun and stars compared to cosmic rays is thought to be due to this process.

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They are because they don't know if viruses are alive and have a mind of its own or its just humans spreading it all around. Another reason is if they do find out they are alive or not they need to find solutions to kill them or to slow/stop the spreading.

Answer:

analyze

Explanation:

The required magnitude of the force that stopped Melissa's car is 118608.7 N.

According to the first law, unless a force acts on an object, it will not alter its motion. According to the second law, an object's force is determined by multiplying its mass by its acceleration. According to the third law, when two objects interact, they exert equal-sized and opposite-direction forces upon one another.

An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

Given,

speed=8.133 m/s

final velocity=0 (due to impact)

time=0.3994 seconds

distance=11.01m

Then,

S = ut + (at^2)/2

a = 2(s - ut)t^2

a = 97.3 m/s^2

So,

Force = ma

Force = 1219(97.3)

Force = 118608.7 N

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Answer:

carbon and oxygen

hope this helps! <3