Calculate [H3O+

] of a 0.150 M acetic acid solution.​

Answer:

Microwaves

Explanation:

Microwaves are electromagnetic waves with wavelengths longer than those of terahertz (THz) wavelengths, but relatively short for radio waves. this is why a cell company would use microwaves to provide service

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Answer:

23.3 g/cm3

Explanation:

First of all, this should be in the math section. I just so happen to also be good at math. Cheers!

We have that for the Question "a platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams" it can be said that The density of the platinum bar is

[tex]\rho=23.33g/cm^3[/tex]

From the question we are told

a platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams

Generally the equation for the density  is mathematically given as

[tex]\rho=\frac{m}{V}\\\\Therefore\\\\\rho=\frac{m}{V}\\\\\rho=\frac{700}{5*4*1.5}\\\\[/tex]

[tex]\rho=23.33g/cm^3[/tex]

Therefore

The density of the platinum bar is

[tex]\rho=23.33g/cm^3[/tex]

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Answer:

[tex]9.3\cdot 10^{37}[/tex]

Explanation:

Power is defined as the energy produced (E) per unit of time (t):

[tex]P= \frac{E}{t}[/tex]

This means that the energy produced in the Sun each second (1 s), given the power [tex]P=4.0\cdot 10^{26}W[/tex], is

[tex]E=Pt=(4.0\cdot 10^{26}W)(1s )=4.0\cdot 10^{26} J[/tex]

Each p-p chain reaction produces an amount of energy of

[tex]E_1 = 4.3\cdot 10^{-12} J[/tex]

in order to get the total number of p-p chain reactions per second, we need to divide the total energy produced per second by the energy produced by each reaction:

[tex]n=\frac{E}{E_1}=\frac{4.0\cdot 10^{26} J}{4.3\cdot 10^{-12} J}=9.3\cdot 10^{37}[/tex]

Answer:

45 V

Explanation:

The voltage across the resistor can be found by using Ohm's law:

[tex]V=RI[/tex]

where

R is the resistance

I is the current

In this circuit,

[tex]R=3 \Omega[/tex]

[tex]I=15 A[/tex]

Therefore, the voltage across the resistor is

[tex]V=(3\Omega )(15 A)=45 V[/tex]

Voltage = (current) x (resistance)   <== memorize this formula

Voltage = (15 Amperes) x (3 ohms)

Voltage = 45 volts

Answer:

1.3 m/s², 210 m

Explanation:

Average acceleration is change in velocity over change in time.

First, convert to SI units.

30. mph ≈ 13.4 m/s

60. mph ≈ 26.8 m/s

a = Δv / Δt

a = (26.8 m/s - 13.4 m/s) / 10.5 s

a = 1.28 m/s²

Rounded to 2 sig-figs, your acceleration is 1.3 m/s².

The distance traveled is:

x = x₀ + ½ (v + v₀)t

x = (0 m) + ½ (26.8 m/s + 13.4 m/s) (10.5 s)

x = 211 m

Rounded to 2 sig-figs, you and your date traveled 210 m.

Final answer:

The acceleration of the car was approximately 1.27728 m/s², and the distance traveled during the acceleration was approximately 211.69242 meters.

Explanation:

To calculate the acceleration, we can use the formula:

a = (Vf - Vi) / t

Where Vf is the final velocity, Vi is the initial velocity, and t is the time. Plugging in the values given, we get:

a = (60 mi/hr - 30 mi/hr) / 10.5s

To make the units consistent, we should convert the velocities from miles per hour to meters per second. Since 1 mi/hr is approximately equal to 0.44704 m/s, after conversion we get:

a = (26.8224 m/s - 13.4112 m/s) / 10.5s = 1.27728 m/s²

To find the distance traveled during acceleration, we use the formula:

d = Vi*t + 0.5*a*t²

Substituting the known values, we find:

d = 13.4112 m/s * 10.5s + 0.5 * 1.27728 m/s² * (10.5s)² = 140.8176 m + 70.87482 m

The total distance traveled by your date during the acceleration is approximately 211.69242 meters.

Answer:

125 m/s

Explanation:

95 is just a measurement of length, depth, or width

You can't go -35.2 m/s

For this case we have by definition, that the speed is a scalar quantity that determines the relation of the distance traveled by a body or object and the time it needs to cover said distance.

So:

ANswer:

Option B

Answer:

≅6.5Ω

Explanation:

In the series resistor circuit, the electric current flows only one path. In the parallel resistor circuit, the current divides and circulates through several paths. These resistances are joined by their two extremes.

The equivalent resistance of a resistor circuit in parallel is equal to the reciprocal of the sum of the inverse of the individual resistors.

For the general case with "n" resistances in parallel the formula is:

[tex]\frac{1}{R_{n} }=\frac{1}{R_{1}}+ \frac{1}{R_{2}} +\frac{1}{R_{3}}+....\frac{1}{R_{n} }[/tex]

Solving for R1 = 7ohm and R2 = 93ohm

[tex]\frac{1}{R_{n} }=\frac{1}{7ohm}+ \frac{1}{93ohm}}[/tex]

[tex]\frac{1}{R_{n} }=0.143ohm+0.011ohm\\\frac{1}{R_{n} }=0.154ohm\\R_{n}=\frac{1}{0.154} ohm\\R_{n}=6.503ohm[/tex]

.

Final answer:

The velocity at which the softball must be moving to equal the momentum of the baseball is 12.30 m/s.

Explanation:

To find the velocity at which the 0.53 kg softball must be moving to equal the momentum of the 0.31 kg baseball, we can use the equation for momentum:

Momentum = mass × velocity

First, let's find the momentum of the baseball:

Momentum of baseball = 0.31 kg × 21 m/s = 6.51 kg·m/s

Now, we can set the momentum of the softball equal to the momentum of the baseball and solve for its velocity:

Momentum of softball = 6.51 kg·m/s

0.53 kg × velocity = 6.51 kg·m/s

velocity = 6.51 kg·m/s / 0.53 kg = 12.30 m/s

Therefore, the softball must be moving at a velocity of 12.30 m/s to equal the momentum of the baseball.

Force is given by m*a

thus

4.719/33 = 0.143 kg

that's 143 grams

Answer:

its 5

Explanation:

Chemical change shows the change in the chemical composition during an experiment. Seth observed 5 signs of chemical changes during the experiment.

when a substance reacts chemically with another substance in order to form a new substance causes decomposition of that substance into two or more substances. The following reaction only takes place due to certain changes during the reaction known as chemical change.

Seth observes signs as follows

The burner is lighting.

The condensation appeared on the top of the test tube.

A  smell was coming from the tube.

There is a light a wooden splint occurs.

when he lit the wooden splint it was immediately extinguished.

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Answer:

2.7 m/s²

Explanation:

Average acceleration is change in velocity over change in time.  Assuming the acceleration is constant, we can say it is equal to the average:

a = Δv / Δt

a = (6.0 m/s - 0 m/s) / 2.2 s

a ≈ 2.7 m/s²

Answer: The first ray diagram

Explanation:

A convex lens is thicker in the center than at its edges and concentrates (converges) at a point the rays of light that pass through it.

Now, the lens shown in the image is a biconvex lens, which is still convergent.

For the specific case in which the object is positioned between the focus F and point 2F, the image produced will be real and inverted.

With real image means that it can be projected on a screen if it is placed just where the rays converge after passing through the lens.

Then, the option that is closest to this fact is the first figure.

Answer:

A the first one

Answer is .... A I think

Answer:

D. Most substances will contract

Explanation:

I took the test; this is the correct answer (:

Answer:

The weight of the object

Explanation:

The downward pull on an object due to gravity is equal to the weight of the object, which is given by

[tex]W=mg[/tex]

where

m is the mass of the object

g is the acceleration due to gravity (on Earth surface, g=9.8 m/s^2)

The weight is a force so it is measured in Newtons (N).

Note that while the mass of an object (m) depends only on the properties of the object, so it does not depend on the location, the weight of the object depends on the value of g, which can change depending on the location (for instance, on the Moon g is 1/6 of the value on Earth), so the weight is not constant.

Answer:

The number above the symbol is the atomic mass (or atomic weight). This is the total number of protons and neutrons in an atom. The number below the symbol is the atomic number and this reflects the number of protons in the nucleus of each element's atom. Every element has a unique atomic number.

Explanation:

Answer:

Earthquakes

Explanation:

A Transform boundary is a fault that occur when two  tectonic plates slide sideways past each other.During the rubbing process, huge portions of rocks on both plates break to create fault lines resulting into earthquakes.The San Andrea Fault is was formed through a similar process.

Using more wire loops

Answer:

using more wire loops.

Explanation:

When there is a change in magnetic flux linked with a coil changes, an emf is induced in the coil. This phenomenon is called electromagnetic induction.

the amount of induced emf developed is

[tex]e = \frac{d\phi }{dt}[/tex]

If there are N number of turns in the coil, then induced emf is given by

[tex]e = N\frac{d\phi }{dt}[/tex]

Induced current is given by

i [tex]i = \frac{e }{R}[/tex]

So, as number of turns increases, the current produced is also increases.

Answer:

Waves interact in a very unique way with the water. Waves often line up parallel to the water surface due to refraction of waves. The parallels depends on the angle from where the waves are hitting the water.

If the waves are coming from deep down the ocean at an angle to the surface, they will most probably refract towards the shallower part of the water and curve around which makes them even more parallel to the surface of water.

Answer:

-272 m/s, 8.03 m/s²

Explanation:

Let's call position 0 the point where the two spacecrafts meet.  Let's say spacecraft #1 starts x units to the left of 0 and spacecraft #2 starts 13500-x units right of 0.

For spacecraft #1:

v = 0 m/s

v₀ = 525 m/s

a = -15.5 m/s²

x = 0 m

x₀ = -x

The distance that spacecraft #1 travels is:

v² = v₀² + 2a(x - x₀)

(0 m/s)² = (525 m/s)² + 2(-15.5 m/s²)(0 m − -x)

0 = 275625 − 31x

x ≈ 8891 m

The time it takes to reach 0 velocity is:

v = at + v₀

0 m/s = (-15.5 m/s²) t + 525 m/s

t ≈ 33.87 s

For spacecraft #2:

v = 0 m/s

x = 0 m

x₀ = 13500-x ≈ 4609 m

t = 33.87 s

Using the same equations:

v² = v₀² + 2a(x - x₀)

(0 m/s)² = v₀² + 2a(0 m − 4609 m)

0 = v₀² − 9218a

v = at + v₀

0 m/s = a(33.87 s) + v₀

0 = 33.87a + v₀

Now we have two equations and two variables.  We can solve the system of equations.

First, let's solve for a and substitute:

0 = 33.87a + v₀

a = -v₀ / 33.87

0 = v₀² − 9218 (-v₀ / 33.87)

0 = v₀² + 272 v₀

0 = v₀ (v₀ + 272)

v₀ = -272 m/s

Now we can find the acceleration:

a = -(-272) / 33.87

a = 8.03 m/s²

By utilizing the equations of motion, you can calculate the exact time it will take for the first spacecraft to come to rest and then apply this to find the acceleration needed for spacecraft#2 to stop in the same time. Additionally, using these equations, we can figure out the initial velocity of spacecraft#2.

To find the initial velocity and constant acceleration for spacecraft #2, we can use the basic principles of physics. The equations of motion are our primary tool in this context, which state that the final velocity of an object is equal to its initial velocity plus acceleration multiplied by time, and the displacement of an object is equal to its initial velocity multiplied by time plus one-half of its acceleration multiplied by time squared.

If both spacecraft are to meet at the same time and come to rest (which means final velocity equals zero), then spacecraft#1 and #2 should cover half the distance each, i.e., 6750 m. Thus, we can use the first equation of motion for spacecraft #1 to find the time it takes for it to come to rest. If we calculate the time, we can use that to determine the constant acceleration required for spacecraft #2 to come to rest in the same time using the second equation of motion. Similarly, the initial velocity of spacecraft #2 can be obtained.

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You're talking about a grain of sand or a stone or a rock that's drifting in space, and then the Earth happens to get in the way, so the stone falls down to Earth, and it makes a bright streak of light while it's falling through the atmosphere and burning up from the friction.

-- While it's drifting in space, it's a meteoroid.

-- While it's falling through the atmosphere burning up and making a bright streak of light, it's a meteor.

-- If it doesn't completely burn up and there's some of it left to fall on the ground, then the leftover piece on the ground is a meteorite.

Answer:

Explanation:

Mass media refers to the technology that it's destined to mass audience, it comprehend the principal mean of communication for the majorities. Mass media could be: newspaper, radio, television, magazines and the biggest of all, the internet.

Among all these mass medias, the internet is the biggest one, because there we have social media, which is mass media specially designated to socialize.

Therefore, the give statement is true, mass media is a form of socialization.

Mass media plays a significant role in socialization. Mass media refers to various forms of communication, such as television, radio, etc The correct statement is true.

Mass media plays a significant role in socialization. Mass media refers to various forms of communication, such as television, radio, newspapers, magazines, and the Internet, that reach a large audience.

Mass media acts as a powerful socializing agent, transmitting societal norms, ideologies, and cultural messages to a wide audience. It helps shape collective identities, social norms and influences how individuals perceive and understand the world around them.

The statement is true.

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Answer:

organ system

Explanation:

An organ system is a group of organs that work together to perform a common function.

The correct answer is an Organ System

Answer:

The correct answer is option C.

Explanation:

The layer below the lithosphere , the upper layer of the mantle of the earth with high heat pressure .It is made up of almost solid rocks but also flows not which indicates that it consist of viscoelastic fluid of molten rocks.This is because in some regions there can be presence of molten rocks.

Answer:

C.

Explanation:

Answer: humans, oxygen, food. Or if you taking about space, there are planets, stars, and galaxys.

Explanation:

I hope this helps!! Can I be brainliest I’ve never before!

Answer:

humans, oxygen, planets

Explanation:

Respiration and Circulation

Hope that helped

I think flat surface mirrors are also just called plane mirrors. One way to tell even if you don't know that this is the answer is by knowing that flat mirrors have "planar reflective surfaces"

Answer:

D)   Some of the light passes through, and some of the light is absorbed or scattered by the object.

Explanation:

When light strikes translucent materials, only some of the light passes through them. The light does not pass directly through the materials. ... When light strikes an opaque object none of it passes through. Most of the light is either reflected by the object or absorbed and converted to heat.

(I googled it) ☺

Answer:

D

Explanation:

Its the answer on my usatestprep

Answer:

zero

Explanation:

a stationary object remains stationary if the sum of the forces acting upon it - resultant force - is zero. A moving object with a zero resultant force keeps moving at the same speed and in the same direction. The normal force is always equal in magnitude and opposite in direction to gravity.

Answer: Yeast produces carbon dioxide

Explanation: Yeasts feed on the sugars in flour and releases the carbon dioxide that makes bread rise.

Answer:

Carbon Dioxide

Explanation:

Bread dough rises because yeast produces Carbon Dioxide.

Carbon Dioxide causes the yeast to rise in the dough because Carbon Dioxide fills p any space. The dough rises because the Carbon Dioxide fills the extra space in the dough, causing the dough to get big and fluffy, aka rise.

Mordancy.

Answer:

Wouldn't it be the muscles in your arms or legs since they have to push the most while they have gravity acting upon them?

Explanation: