What type of particle results from the formation of a covalent bond?

proton

ion

atom

molecule

As per the spectrum due to electromagnetic waves we know that the frequency is increased as we move from radio waves to gamma rays.

So gamma rays must be with highest frequency and lowest wavelength

So error in the above mentioned table is

Gamma rays should have a very high frequency, not a very low frequency.

The mistake that Kamala made from the table is that Gamma rays should have a very high frequency, not a very low frequency.

These are the rays that happen due to radioactive decay that occurs in the atomic nuclei.

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Gasses from the earth escape from higher realms of the atmosphere.

Answer: 18.35 m/s

Explanation:

At the highest point of trajectory, the vertical component of the velocity would be zero and the tennis ball would have horizontal component of velocity.

It is given that the initial velocity of the ball is 32 m/s and it makes 35° with the vertical. Hence the horizontal component of the velocity,

v sin θ = 32 m/s × sin 35° = 18.35 m/s

Hence, at the highest point in its trajectory, the tennis ball would be moving with the speed  18.35 m/s.

1.53 meters per second

The correct answer is 2 N/cm, I take k12 and that was the correct answer

The statement that correctly describes the relationship between these two new cells and the parent cell is, mitosis results in two exact copies of the parent cell's genetic information. The correct option is A.

In the cell division process known as mitosis, the parent cell divides to produce two genetically identical daughter cells. Cells from the same father and daughter share genetic information.

Prophase, Metaphase, Anaphase, and Telophase make up Mitosis. Human somatic cells go through a process called mitosis. A cell divides into two identical daughter cells after duplicating all of its components, including its chromosomes, during mitosis.

Therefore, the correct option is A. Mitosis results in two exact copies of the parent cell's genetic information.

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The question is incomplete. Your most probably complete question is given below:

A.Mitosis results in two exact copies of the parent cell's genetic information

B.Mitosis results in four exact copies of the parent cell's genetic information.

C.Mitosis results in two new cells that are genetically different from the parent cell.

D.Mitosis results in four new cells that are genetically different from the parent cell

According to Ohm's law for a portion of the circuit we have:

U=RI=>I=U/R=24/3=8 A

The correct answer is  B

The current flowing through the bulb having a resistance of 3 ohms is 8 A.

The correct answer to the question is Option B. 8 A

From the question given above, the following data were obtained:

Voltage (V) = 24 V

Resistance (R) = 3.0 ohms.

The current flowing through the bulb can be obtained by using the ohm's law equation as illustrated below:

24 = I × 3

Divide both side by 3

I = 24 / 3

Therefore, the current flowing through the bulb is 8 A.

The correct answer to the question is Option B. 8 A

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Magnet

In general the magnet is a special kind of metal (alloy), it attracts other metals or or magnet closer to it.

The earth is a magnet, because it attracts everything towards it.

compass:

A compass is needle, which is magnetized and mounted in measuring devices (like, pressure gauge, voltmeter, watt meter, etc.) such that it rotates freely. In the measuring devices the needle turns until one end points north and other south.

Demonstration:

Let us consider an ordinary bar magnet and a regular compass, Now move  the regular compass around the bar magnet (circling) , and observe it, what happen?

Yes, you will notice the needle rotates in the regular compass. When you  bring the compass  near the bar magnet, the needle of the compass points to the south and when the compass away from a bar magnet, the needle moves to the  north pole. So we conclude that the north end of the compass attracted to the south end of the magnet.  

The force exerted by Earth plays the role of centripetal force.

Answer:

A- GRAVITY

Explanation:

IF IS ON USATestprep

d = st

100 = 35t

35t = 100

35t/35  =  100/35

t =  20/7  or 2.9 s

c ... max speed zero accel

Answer:

A

Explanation:

Answer: C. Gravity that pulls matter inward in a spiraling matter.

Explanation:

In astrophysics, particles are pulled towards a massive object due to gravity which further attracts more particles. A disk of particles is formed around the object. Hence, we can define Accretion as a process in which particles are accumulated in a form of a disk of surrounding a massive object (like a black-hole) due to gravity which pulls the matter inwards and matter spirals around the massive object. Galaxies, planets etc. are formed out of accretion process. Thus, the correct option is C.

Answer:

Answer C

Explanation:

Edge

A person that is standing behind a moving siren will interpret the frequency to be lower compared to the person that would be standing in front of it. This is because the sound is now moving away from the person behind the siren and at this point the sound is juts lingering but, still very low.

Answer: Smaller than it actually is.

Explanation:

The person is behind the moving siren, and in this case, we assume that the siren is moving away from the man. By the Doppler effect, we know that a wave that comes from a source that is moving away will suffer a "redshift", which means that the wavelength increases a little bit, now, as you may know, the relation between the wavelength and the frequency comes by the equation:

velocity = wavelength/frequency.

If we keep the velocity constant (the velocity of the sound is the same independent of the frequency) then, if we have an increase in the wavelength, we must have a decrease in the frequency to maintain the velocity constant. From this, we can see that a redshift is also associated with a decrease in the frequency of the wave.

Then, the person behind the moving siren will interpret the frequency as being smaller than it actually is.

Answer:

Explanation:

its 85 cm because it just is in meters it would be .8m  which would be decent distance to hear it

The current flowing through the resistor is 2.44 x 10^-3 A.

To find the current flowing through the resistor, you can use Ohm's Law which states that the current (I) is equal to the potential difference (V) across the resistor divided by the resistance (R). In this case, the potential difference across the resistor is 4.4 × 10 V and the resistance is 1.8 kΩ (which can be converted to 1.8 x 10^3 Ω). Using Ohm's Law:

I = V / R = (4.4 x 10) / (1.8 x 10^3) = 2.44 x 10^-3 A

Therefore, the current flowing through the resistor is 2.44 x 10^-3 A.

The principle of popular sovereignty, which states that all political power comes from the people, is best represented by the scenario where a senator holds town hall meetings to decide on their vote for gun control legislation. This shows direct influence of people's will on government decisions.

The principle of popular sovereignty, which holds that all powers of

government are directly or indirectly derived from the people, is best illustrated by the scenario where 'A senator holds town hall meetings to find out how citizens think she should vote on gun control legislation' (Option C). This scenario illustrates popular sovereignty as it exemplifies how the people's will is directly influencing governmental decisions. The senator is seeking the opinion of the citizens she represents before making a decision, thereby extending the power to the people. In the other options, the actions are either reactions to misconduct or a decision made by office holders rather than a direct involvement or representation of the citizens who form the true sovereign base of the government.

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The cat fell 1.0 m from the ground.

Using the formula

[tex]h = v_{oy}t - \frac{gt^2}{2}[/tex]

Here, [tex]v_{oy} = 0, \; h = 1.0 \; m.[/tex]

Solving for t, the time it spent in the air is

[tex]t = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2(1.0 \; m)}{9.8 \; m/s^2}} = 0.451753951 \; s[/tex]

The cat does not accelerate along the horizontal, so it has constant horizontal velocity. Since it strikes the floor 2.2 m from the table, then

[tex] v_x = \Delta x/t = \frac{2.2\; m}{0.451753951 s} = 4.869907597 \; m/s \Rightarrow 4.9 \; m/s [/tex]

The problem involves concepts of projectile motion and gravity. It first calculates the falling time under gravity and then uses this time to figure out the cat's horizontal speed when it slid off the table, which comes out to be 4.9 m/s.

This problem involves multiple concepts from physics including projectile motion and gravity. The cat sliding off the table can be viewed as a projectile because it moves in two dimensions: horizontally (the cat sliding across the table and off the edge) and vertically (the cat falling down due to gravity). The key is to break down the problem into these two dimensions and solve them separately.

To calculate the horizontal speed, we first need to use the gravitational acceleration and the vertical distance to determine the time it takes for the cat to hit the ground. Assume the gravitational acceleration is approximately 9.8 m/s^2. When an object is falling freely under influence of gravity (from a certain height), the distance is equal to 0.5*g*t^2, where g is the gravitational acceleration and t is time. So, from the equation 1.0m = 0.5*9.8m/s^2*t^2, we solve for t and get t = sqrt(2h/g) = sqrt(2*1/9.8) ≈ 0.45 seconds.

Now, we know the cat hit the floor 2.2 meters away from the edge of the table. Given it did this in approximately 0.45 seconds, we can use the basic speed equation, distance/time, to find out the speed. Therefore, speed = 2.2 m / 0.45 s ≈ 4.9 m/s. This is the speed at which the cat was sliding off the table.

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Answer: Remain unchanged

Explanation:

The boat with water barrel overboard floats in swimming pool when weight of the water displaced by the boat is equal to the buoyant force acting on the boat.

When the water in the barrel is poured overboard, the level of the swimming pool level would remain unchanged as the weight of the boat  with the water and barrel would remain unchanged ( as the density and volume of the whole system remains same) and hence, the weight of the water (of the swimming pool) displaced by the boat would remain same.

A boat loaded with a barrel of water floats in a swimming pool. When the water in the barrel is poured overboard, the swimming pool level will remain unchanged.

When water is poured from the barrel in the boat into the pool, the swimming pool water level remains unchanged due to the principles of buoyancy and displacement.

The phenomenon in question is related to the principles of buoyancy and displacement. When the barrel of water is onboard the boat, the total weight of the water and the boat is what displaces the pool water, causing it to rise up to a certain level. When the water is poured overboard, it is still in the pool, but the boat now weighs less and displaces less water. However, since the water from the barrel is now directly part of the pool, it displaces the same volume that the boat was displacing when holding the barrel full of water.

Therefore, the overall level of the swimming pool water will remain unchanged.

(a) [tex]\vec{F} = 1.0 \vec{i} - 2.0 \vec{j}[/tex]

The two forces are:

[tex]\vec{F_1} = 3.0 \vec{i} + 4.0 \vec{j}\\\vec{F_2} = -2.0 \vec{i} -6.0 \vec{j}[/tex]

To calculate the net force, we must calculate the resultant of the two vectors, which is obtained by separately summing the components of each vector:

[tex]F_x = 3.0 \vec{i}+(-2.0) \vec{i} = 1.0 \vec{i}\\F_y = 4.0 \vec{j} + (-6.0) \vec{j} = -2.0 \vec{j}[/tex]

So, the net force is

[tex]\vec{F} = 1.0 \vec{i} - 2.0 \vec{j}[/tex]

(b) 2.24 N

The magnitude of the net force is given by the Pythagorean theorem: it is equal to the square root of the sum of the squares of the single components:

[tex]|F|= \sqrt{F_x^2+F_y^2}=\sqrt{(1.0)^2+(-2.0)^2}=\sqrt{5}=2.24 N[/tex]

(c) [tex]-63.4^{\circ}[/tex]

The angle of the net force, relative to the positive x direction, is equal to the arctangent of the ratio between the vertical component and the horizontal component:

[tex]\theta=tan^{-1} (\frac{F_y}{F_x})=tan^{-1}(\frac{-2.0}{1.0})=-63.4^{\circ}[/tex]

(d) 2.24 m/s^2

The mass of the object is m = 1 kg, so according to Newton's second law the acceleration is given by

[tex]\vec{a} = \frac{\vec{F}}{m}[/tex]

Since we are interested in the magnitude of the acceleration, we have to take the magnitude of the net force into the calculation:

[tex]|a| = \frac{|F|}{m}=\frac{2.23 N}{1.0 kg}=2.24 m/s^2[/tex]

(e) [tex]-63.4^{\circ}[/tex]

According to Newton's second law:

[tex]\vec{a} = \frac{\vec{F}}{m}[/tex]

The acceleration has the same direction of the force, therefore the angle of the acceleration (measured with respect to the positive x direction) is [tex]-63.4^{\circ}[/tex].

The net force acting on the 1kg standard body is 1.0i - 2.0j in unit vector notation. The magnitude of the net force is 2.236 units. The angle of the net force is -63.43 degrees relative to the positive x-direction. The magnitude and angle of a are not provided in the question.

To find the net force acting on the 1kg standard body, we need to add the two given forces vectorially. Adding f1 and f2 gives us fnet= (3.0 + (-2.0))i + (4.0 + (-6.0))j = 1.0i - 2.0j. So, fnet = 1.0i - 2.0j in unit vector notation.

The magnitude of fnet is found by taking the square root of the sum of the squares of its components: √(1.0² + (-2.0)²) = √5 = 2.236. So, the magnitude of fnet is 2.236 units.

The angle of fnet relative to the positive x-direction can be found using the inverse tangent function: tan^(-1)(-2.0/1.0) = -63.43 degrees. So, the angle of fnet is -63.43 degrees relative to the positive x-direction.

The magnitude and angle of a are not provided in the question, so we cannot determine those values.

V = speed of the plane with no wind = 250 mph

v = speed of wind  

consider the motion of the plane while traveling with the wind :

V' = speed of plane travelling in the direction of wind = V + v = 250 + v

d' = distance traveled = 300 miles  

t' = time taken to travel the distance  

time taken to travel the distance is given as  

t' = d'/V'

t' = 300/(250 + v)                                           eq-1

consider the motion of the plane while traveling against the wind :

V'' = speed of plane travelling against the direction of wind = V - v = 250 - v

d'' = distance traveled = 200 miles  

t'' = time taken to travel the distance  

time taken to travel the distance is given as  

t'' = d''/V''

t'' = 200/(250 - v)                                           eq-2

Given that :

time taken to travel 300 miles = time taken to travel 200 miles  

t' = t''

using eq-1  and eq-2

300/(250 + v)  = 200/(250 - v)

3/(250 + v)  = 2/(250 - v)

750 - 3 v = 500 + 2 v  

5 v = 250

v = 50 mph

By setting up an equation based on the given information and the concept of relative velocity, the speed of the wind can be found to be 50 mph.

You're looking for the speed of the wind, a classic problem that involves the concept of relative velocity. Here, the airplane's speed is impacted by the wind, either aiding its motion when it's flying with the wind, or hindering its motion when it's flying against the wind.

To calculate this, let's denote the speed of the wind as 'w'. When the plane is flying with the wind, its effective speed is (250 + w) mph, and when it's flying against the wind, its effective speed is (250 - w) mph.

Given the equation of speed which is the distance divided by time, we know that the time it takes to travel with the wind and the time it takes against the wind are the same from the question. Thus, distance over speed for both situations can be equated, i.e.:

300 / (250 + w) = 200 / (250 - w)

Solving that equation gives w = 50 mph.

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Answer:

A. 8

Explanation:

Atomic number of oxygen = 8

Oxygen is the 8th element in periodic table.

Atomic no. = 8, means one oxygen atom has 8 protons. Now, because the atom is neutral, so number of electrons = no. of protons in an atom.

Hence, the number of electrons in a neutral oxygen atom is 8.

Answer:A

Explanation:The answer is a because a neutral atom of oxygen is represented as O. It is atomic number of 8. Hence, it contains 8 electrons and 8 protons.

Answer:

Reactance

Explanation:

In an AC circuit, the capacitive reactance of a capacitor is given by:

[tex]X_C = \frac{1}{2 \pi f C}[/tex]

where

f is the frequency of the AC current

C is the capacitance of the capacitor

The reactance of the capacitor tells somehow the "resistance" of the capacitor to the passage of current through it. In fact:

- When the frequency of the AC current is zero (this means, we are in regime of DC current), the reactance becomes infinite, and this is true because the capacitor does not let the current pass through it)

- When the frequency of the AC current tends to infinite, the reactance becomes zero, and this is true because in this case the current changes direction so fast that the capacitor has not enough time to "block" the current, so the current almost no feels the presence of the capacitor.

Answer:

0.52 m

Explanation:

The motion of the studnet is an accelerated motion, with constant acceleration [tex]g=9.8 m/s^2[/tex] (acceleration of gravity) toward the ground. We can find the distance covered by the student (which is equal to the height from which he falls) by using the SUVAT equation:

[tex]v^2 -u^2 = 2ad[/tex]

where

v = 3.2 m/s is the final speed

u = 0 is the initial speed

a = 9.8 m/s^2 is the acceleration

d is the distance covered

By re-arranging the equation, we find:

[tex]d=\frac{v^2-u^2}{2a}=\frac{(3.2 m/s)^2-0}{2(9.8 m/s^2)}=0.52 m[/tex]

Final answer:

The student fell from a height of 0.52 meters.

Explanation:

To calculate the height from which the physics student fell, we can use the formula for free fall. The initial velocity is 0 m/s as the student is dropped. The final velocity is given as 3.2 m/s. We can use the equation v² = u² + 2as, where v is the final velocity, u is the initial velocity, a is the acceleration due to gravity (approximately 9.8 m/s²), and s is the height. Rearranging the equation to solve for s, we get s = (v² - u²) / (2a). Plugging in the values, s = (3.2² - 0) / (2 * 9.8) = 0.52 meters. Therefore, the student fell from a height of 0.52 meters.

B. The beam in a cathode ray tube was moved by an electric force.

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In the acidic column: Coffee, Lemon juice, Orange juice, Soft drink, Vinegar, and Tomato are included. In the basic column: Baking soda and Milk of magnesia are included. In Neutral column: Antacid, Detergent, Salt, Sugar and Water are included.

Here are the classifications of the items in the image:

Acidic:

Coffee - Coffee has a pH of around 5, which is slightly acidic. This is due to the presence of organic acids such as chlorogenic acid and quinic acid.

Lemon juice - Lemon juice has a pH of around 2, which is very acidic. This is due to the presence of citric acid.

Orange juice - Orange juice has a pH of around 3-4, which is acidic. This is due to the presence of citric acid and ascorbic acid.

Soft drink - Soft drinks typically have a pH of around 2.5-3.5, which is acidic. This is due to the presence of phosphoric acid, carbonic acid, and citric acid.

Tomato - Tomatoes are slightly acidic, with a pH of around 4. This is due to the presence of citric acid and malic acid.

Vinegar - Vinegar has a pH of around 2-3, which is very acidic. This is due to the presence of acetic acid.

Basic:

Baking soda - Baking soda has a pH of around 9, which is slightly basic. This is due to the presence of sodium bicarbonate.

Milk of magnesia - Milk of magnesia has a pH of around 10, which is basic. This is due to the presence of magnesium hydroxide.

Neutral:

Antacid - Antacids are typically designed to have a pH of around 7, which is neutral. This is because they are used to neutralize stomach acid.

Detergent - Detergents can have a pH range of 6-12, depending on the type of detergent. However, most detergents are formulated to be neutral or slightly alkaline.

Salt - Salt (sodium chloride) has a pH of around 7, which is neutral.

Sugar- Sugar (sucrose) has a pH of around 7, which is neutral.

Water - Pure water has a pH of 7, which is neutral.

#1

Work done is given by

[tex]W = F.d cos\theta[/tex]

here we know that

F = 157 N

d = 14.5

[tex]\theta = 25^0[/tex]

now from the above formula

[tex]W = (157)(14.5)cos25 = 2063.2 J[/tex]

#2

By energy conservation

Initial total potential energy of egg = final total kinetic energy of egg

[tex]mgh = \frac{1}{2}mv^2[/tex]

[tex]v = \sqrt{2gh}[/tex]

[tex]v = \sqrt{2(9.8)(8.2)}[/tex]

[tex]v = 12.7 m/s[/tex]

#3

By momentum conservation we know that

[tex]m_1v_1 = (m_1 + m_2)v[/tex]

[tex]215(9.5) = (215 + 19.7) v[/tex]

[tex] v = \frac{215 (9.5)}{215 + 19.7}[/tex]

[tex]v = 8.7 m/s[/tex]

#4

by momentum conservation we know that

[tex]m_1v_1 + m_2v_2 = (m_1 + m_2) v[/tex]

let direction of velocity of Jay Z car motion is positive direction

now we will say

[tex]1100(-20) + 1475v = (1100 + 1475)(7)[/tex]

[tex]1475 v = 2575(7) + 1100(20)[/tex]

[tex]v = 27.14 m/s[/tex]

Yes Jay Z is overspeeding as his speed is more than speed limit

#5

Tension force in the string will be centripetal force

so here we can say

[tex]T = \frac{mv^2}{R}[/tex]

here we know that

m = 0.63 kg

v = 7.8 m/s

R = 0.23 m

[tex]T = \frac{0.63 (7.8)^2}{0.23}[/tex]

[tex]T = 166.6 N[/tex]

so other scientists can see how spread out your data are

The average net force required to stop the 4 kg bowling ball in 0.5 s is -80 N.

To find the average net force required to stop the bowling ball, we can use the equation:

average net force = change in momentum / time taken

First, calculate the change in momentum:

Substitute the given values:

Next, divide the change in momentum by the time taken:

Average net force = -40 kg·m/s / 0.5 s = -80 N

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The average net force required to stop a 4 kg bowling ball initially traveling at 10 m/s in 0.5 seconds is -80 N, echoing that the force is used to stop the ball's motion.

To calculate the average net force, we'll need to know the initial velocity, final velocity, and the time it took for the change to occur. In this scenario, the initial velocity is 10 m/s, the final velocity is 0 m/s (since the bowling ball comes to a stop), and the time over which this change happens is 0.5 seconds. The change in velocity (or acceleration) is calculated as (final velocity - initial velocity)/time. So, it's (0 m/s - 10 m/s) / 0.5 s = -20 m/s². As the force is calculated using F = ma, where m is the mass and a is the acceleration, the force would be F = 4 kg × (-20 m/s²) = -80 N. The negative sign indicates that the force is used to stop the motion of the bowling ball.

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Answer:

A) remain at 0 m/s2.

Explanation:

A skydiver has reached the point where the force of air resistance equals the force of gravity. Until she opens her parachute, her acceleration will

A) remain at 0 m/s2.

B) continue increasing.

C) continue decreasing.

D) remain at 9.8 m/s2.

resistive force is the force exerted by air on an object passing through it.

at the point point where the force of air resistance equals the force of gravity.we say the sky driver has reached the terminal speed

Terminal speed is the speed at which the force from the weight of the skydriver equals the force of air resistance, so the acceleration is zero. when the change in velocity is zero, then the acceleration becomes zero.