Can anyone plz send me the solved questions this is Energy chapter ​

Answer:Acids and bases cannot mix together. Acids and bases will neutralize each other. Acids, but not bases, can change the pH of a solution. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+)

Answer:

Number of electron wavelength will Double

Explanation:

let the radius = r  and wavelength = λ

when R doubles and  λ ( wavelength ) remains the same

The number of electron electron wavelengths will double as well

Using Bohr's angular momentum quantization to show this

attached below

Answer:

Break it into cubes. When you make the thing that is dissolving smaller, the surface area of the thing dissolving it is larger, making the jelly more exposed.

Answer:

The final equilibrium temperature is approximately 26.69 °C

Explanation:

The heat transferred, ΔQ, from a hot body to a cold one is given by the following formula;

ΔQ = m·c·ΔT

Where;

m = The mass of the body

c = The specific heat capacity of the body

ΔT = The temperature change of the body

The given mass of the gold bar, m₁ = 20.0 kg

The initial temperature of the gold bar, T₁ = 35.0 °C

The specific heat capacity of gold, c₁ = 0.13 kJ/(kg·K)

The mass of the glass container, m₂ = 0.8 kg

The initial temperature of the glass container, T₂ = 15°C

The specific heat capacity of glass, c₂ = 0.792 kJ/(kg·K)

The mass of the added water, m₃ = 2.0 kg

The initial temperature of the added water, T₃ = 25°C

The specific heat capacity of water, c₃ = 4.2 kJ/(kg·K)

The heat lost by the gold = The heat gained by the glass and the water

Let 'T' represent the temperature at the final equilibrium, we have;

m₁·c₁·ΔT₁ = m₂·c₂·ΔT₂ + m₃·c₃·ΔT₃

Where;

ΔT₁ = T₁ - T

ΔT₂ = T - T₂

ΔT₃ = T - T₃

∴ 20.0 × 0.13 × (35 - T) = 0.8 × 0.792 × (T - 15) + 2.0 × 4.2 × (T - 25)

Expanding and collecting like terms (using a graphing calculator) gives;

91 - 2.6·T = 9.0336·T - 219.504

9.0336·T + 2.6·T = 219.504 + 91 = 310.504

11.6336·T = 310.504

T = 310.504/11.6336 ≈ 26.69

The final equilibrium temperature, T ≈ 26.69 °C.

Answer:

Height of resulting wave = 0.6 meters

Explanation:

Let the higher wave (wave crest) be A while the lower wave (wave trough) be B.

Given the following data;

A = 3.2m

B = 2.6m

To find the height of the resulting wave;

Height = A + B

But the lower wave becomes negative because it is below i.e on the lower trough.

Height = 3.2 + (-2.6)

Height = 3.2 - 2.6

Height of resulting wave = 0.6 meters

Answer:

Held

~Hope it Helps!~

Answer:

r = 0.0548 m

Explanation:

Given that,

Singly charged uranium-238 ions are accelerated through a potential difference of 2.20 kV and enter a uniform magnetic field of 1.90 T directed perpendicular to their velocities.

We need to find the radius of their circular path. The formula for the radius of path is given by :

[tex]r=\dfrac{1}{B}\sqrt{\dfrac{2mV}{q}}[/tex]

m is mass of Singly charged uranium-238 ion, [tex]m=3.95\times 10^{-25}\ kg[/tex]

q is charge

So,

[tex]r=\dfrac{1}{1.9}\times \sqrt{\dfrac{2\times 3.95\times 10^{-25}\times 2.2\times 10^3}{1.6\times 10^{-19}}}\\\\r=0.0548\ m[/tex]

So, the radius of their circular path is equal to 0.0548 m.

This is a classic case of 'velocity components.'

Imagine a vector for velocity. Now, consider that this vector could be the hypotenuse of a right triangle, with two other sides going along the x and y-axis. These sides of the triangle will have values, and adding them up using the pythagorean theorem will prove that the sum of their squares equals the square of the original vector.

Well, okay, that's nice and all, you may be saying - but how do we solve the actual question?

Let's apply this thought to the question. This vector can have both an x component and y component (essentially, parts of the vector that travel along the x and y-axis).

Now, what could these components be? We know that the stone is thrown perfectly horizontally, meaning that the x-component is quite literally the velocity.

How about the y-component? Since it's thrown at a perfect horizontal, there isn't really any vertical velocity whatsoever. There's only horizontal velocity.

"Great, fantastic! So, what's the importance of figuring out the horizontal and vertical velocities?"

When a stone is in free fall, it experiences a gravitational acceleration. This acceleration from gravity, though, only affects the vertical velocity. Since gravity is vertical as well, it's essentially impossible for the horizontal velocity to be changed at all.

This means that to solve the horizontal distance, we simply need to find the time it takes for the rock to hit the ground and multiply said time by the horizontal velocity.

Since the vertical velocity is the only thing changed by gravity, we can write out an equation that can solve for the time:

∆Y = [tex]v_{i}[/tex]t + [tex]\frac{1}{2}[/tex]g[tex]t^{2}[/tex]

We know that initial vertical velocity is zero, so:

∆Y = [tex]v_{i}[/tex]t + [tex]\frac{1}{2}[/tex]g[tex]t^{2}[/tex]

∆Y = 0t + [tex]\frac{1}{2}[/tex]g[tex]t^{2}[/tex]

∆Y = [tex]\frac{1}{2}[/tex]g[tex]t^{2}[/tex]

We need to solve for t, so let's isolate the variable. Multiply both sides by 2 to get rid of the fraction:

∆Y * 2 =  [tex]\frac{1}{2}[/tex]g[tex]t^{2}[/tex] * 2

2∆Y = g[tex]t^{2}[/tex]

Divide both sides by g:

(2∆Y)/g = [tex]\frac{gt^{2} }{g}[/tex]

Square root both sides:

[tex]\sqrt{(2Y)/g}[/tex] = [tex]\sqrt{t^{2} }[/tex]

t = [tex]\sqrt{(2Y)/g}[/tex]

Input our values for Y and g (Y is the height of the cliff, and g is gravitational acceleration):

t = [tex]\sqrt{(2*50)/9.80}[/tex]

Solve:

t =  [tex]\sqrt{(2*50)/9.80}[/tex]

t = 3.194 (s)

Whew! That was a lot of steps to find the time! Now that we have the time, we can find the horizontal distance the rock travels:

∆x = [tex]v_{i}[/tex]t + [tex]\frac{1}{2}[/tex]a[tex]t^{2}[/tex]

The horizontal velocity has no acceleration (gravity is vertical!), so:

∆x = [tex]v_{i}[/tex]t + [tex]\frac{1}{2}[/tex]*0*[tex]t^{2}[/tex]

∆x = [tex]v_{i}[/tex]t

The horizontal velocity is 15 m/s, and the time is 3.194:

∆x = [tex]v_{i}[/tex]t

∆x = 15 * 3.194

∆x = 47.91 (m)

Since we rounded the time, it makes sense that our final answer's a little bit off to the options. The closest one is option B, which is only 0.6m off, a tiny difference that may have come from the test maker's use of '10 m/[tex]s^{2}[/tex]' as the gravitational acceleration (while we stayed as accurate as possible with 9.80) as well as our rounding of the final time.

Option B, the stone will have travelled 47.85 meters.

If you have any questions on how I got to the answer or if you're still confused on any topic I attempted to explain, just ask in the comments and I'll try to answer it to the best of my ability! Good luck!

- breezyツ

Answer:

A.  Car #1 has 2-times the momentum as Car #2

Explanation:

Momentum is defined as the product of mass and velocity:

[tex]P = mv[/tex]

where,

P = Momentum

m = mass

v = velocity

FOR CAR # 1:

m = 1000 kg

v = 10 m/s

Threfore,

[tex]P_1 = (1000\ kg)(10\ m/s)\\P_1 = 10000\ N.s[/tex]

FOR CAR # 2:

m = 500 kg

v = 10 m/s

Threfore,

[tex]P_2 = (500\ kg)(10\ m/s)\\P_2 = 5000\ N.s[/tex]

Dividing both momentums:

[tex]\frac{P_1}{P_2} = \frac{10000\ N.s}{5000\ N.s}\\\\P_1 = 2P_2[/tex]

Therefore, the correct option is:

A.  Car #1 has 2-times the momentum as Car #2

Answer:do it again

Explanation:

It will work

Answer:

Car A has a velocity of 40 km/hr  west.

Explanation:

The velocity of an object is a vector quantity. It has both magnitudes as well as direction.

Arrows are used to show direction.

Car A is moving towards west. Car B is moving towards east-south direction. Car C is moving towards South direction. Car E is moving towards North direction.

So, the correct option is (a) i.e. Car A has a velocity of 40 km/hr  west.

Answer:

Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen, and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.

Explanation:

Answer:

30N

Explanation:

Answer:  

Periods indicate that a new period at a new principal energy level which is filled with electrons. Groups indicate that the elements share similar properties because their shells are filled with the same number of valence electons.

Explanation:  

We see that starting at period 2 Li has a  +1 charge , He has +2 charge, B has +3 charge, C has the potential to have a +4 charge or -4 charge (because it can gain or loose electrons) and N has a -3 charge, etc. Groups however, have similar properties and every element in a 1A - 8A has the same number of valence electrons. All except the noble gases in which He only needs 2 electrons to be in a perfect state. This is its octet as it would be a completely different element if it had more than 2 electrons in its shell. An example of the groups sharing similar properties is if we were to look at group 1A. In group 1A we find H, Na, K, etc. These are all highly unstable elements when alone (not in a compound) and they are very reactive. If you were to put Na for instance in water, it would light up and you'd see a flame sitting on top of the water. A scientist could do that with the rest of the elements in the group and they would see this increasing in reactivity as you go down the periods. Francium isn't visible long enough to be able to see this happen though. It's more of that kind of element that scientists prove that it exists, but not a very common element to get to learn much about.

Answer:

Explanation:

The answer is Climate

Answer:

climate

Explanation:

Climate is defined as an area's long-term weather patterns. The simplest way to describe climate is to look at average temperature and precipitation over time.

Answer:

a star in andromeda

Explanation:

all of the other objects are in the milkyway (where we are) and the andromeda galaxy is 2 million light years away from us

Answer:

option C : they push apart

Explanation:

If you hold two magnets the wrong way around, they push apart - they repel! In other words, if you hold two magnets together so that like-poles are close together (two norths OR two souths), they repel

Answer:

the magnet push apart

Explanation:

that is the two magnet are facing each other with the same pole...

that is to say like pole push apart and unlike pole attract

Answer:

3

Explanation:

Answer:

A By returning nutrients to the soil

Explanation:

Here are the options

A By returning nutrients to the soil

B By releasing oxygen into the air

C By making space for new animals

D By decreasing the population of herbivores

The process by which mushrooms act on dead trees provide nutrients that are necessary for the process of photosynthesis.

Types of decomposers

Functions of a decomposer

The electromagnetic waves are used in these applications are:

Diagnosing illnesses: X-rays.

Warming and cooking food:  infrared waves.

Transmitting data from remote controls to televisions: Radio waves.

The oscillations between an electric field and a magnetic field produce waves known as electromagnetic waves, or EM waves. In other words, magnetic and electric fields oscillate to form electromagnetic (EM) waves.

When an electric field interacts with a magnetic field, electromagnetic waves are created. Therefore, they are referred to as "electromagnetic" waves. An electromagnetic wave's electric field and magnetic field are perpendicular to one another (at right angles). Additionally, they are perpendicular to the EM wave's direction. An electromagnetic wave can pass through any medium, including vacuum, solid materials, and air. It can spread or move from one area to another without the use of a medium.

Learn more about electromagnetic wave here:

https://brainly.com/question/3101711

#SPJ5

Answer:

b

Explanation:

the solar system is smaller then nebula nebula is smaller then a galaxie and a galaxie is smaller then a universe

Answer:

c. molecular movement

Explanation:

.....

Answer:

Explanation:

(water based paint)

If the paint stain is still wet, simply blot the spot with a wet paper towel  - don’t scrub, just blot.

If the paint stain is dry, use hot water and a little bit of dish detergent. Let the solution sit for a few minutes to soften the paint.

Once the paint is softened, use a knife or pin to scrape the paint stain. Continue to add more solution as you scrape.

If the paint is still not softening, consider using a handheld steamer while you scrape to eventually remove the paint stain from the carpet.

(latex based paint)

Blot the spot to remove as much wet paint as possible – don’t scrub, or you’ll push the paint further down into the carpeting.

Mix a cup of lukewarm water with one teaspoon of dishwashing detergent – just make sure the detergent is mild.

Work from the outside of the paint stain to the inside, gently blotting the affected area.

After letting the area dry completely, follow up by vacuuming.

(oil based paint)

If the paint stain is dry, you’ll want to use a steamer to soften the stain.

Apply steam directly to the stain.

Simultaneously pick at the paint stain with a needle or a pin to try and break it up.

Continue until stain is removed, without damaging fibers.

The equation of GPE is mgH, where m is mass, g is gravitational acceleration, and H is the height.

If we're solving for the change in GPE, then:

∆[tex]U_{g}[/tex] = mg∆H

Input our given values for m and g:

∆[tex]U_{g}[/tex] = 0.25 * 9.80 * ∆H

The book falls from 2 meters high to 0.5 meters high, so:

∆[tex]U_{g}[/tex] = 0.25 * 9.80 * (2.0 - 0.5)

∆[tex]U_{g}[/tex] = 0.25 * 9.80 * 1.5

∆[tex]U_{g}[/tex] = 3.675 (J)

Adjust for significant figures:

∆[tex]U_{g}[/tex] = 3.7 (J)

The change in gravitational potential energy was 3.7 (J)

If you have any questions on anything I did to get to the answer, just ask!

- breezyツ

Answer:

Angle of incidence. = Angle of reflection

0° = 0°

30°. = 30°

42°. =. 42°

60°. =. 60°

90°. =. 90°

angle of incidence is always equal to angle of reflection on plane surface

Hope it helps

Answer:

The answer is "[tex]3.92 \times 10^{16} \ m[/tex]"

Explanation:

Given:

[tex]\to v= 1.31 \times 10^8 \\\\\\to f=2.99\times 10^8 \ \frac{m}{s}\\\\[/tex]

Using formula:

[tex]\lambda=vf\\\\[/tex]

  [tex]=2.99\times 10^8 \times 1.31\times 10^8\\\\=2.99\times 1.31\times 10^{16}\\\\=3.9169 \times 10^{16} \ m[/tex]

  [tex]=3.92 \times 10^{16} \ m[/tex]

Answer: according to https://www.doe.virginia.gov When light strikes translucent materials, only some of the light passes through them. The light does not pass directly through the materials. ... Opaque objects block light from traveling through them. Most of the light is either reflected by the object or absorbed and converted to thermal energy.

Explanation:

Answer:

A.1

Explanation:

on the vector plot you should count up and if you count up you´ll get one

The length of the y-component of the vector plotted in the given question would be 1. Thus, the correct option is A.

A vector field can be defined as an assignment of a vector to each point in the subset of space. For instance, a vector field in the plane can be easily visualized as a collection of arrows with a given magnitude and direction of a particle, each line or arrow attached to a point in the plane of space.

Vector plots are used to create vector lines between any two points or from one point in space to the specified angle direction and with the selected magnitude and direction of the quantity or quality.

In the given graph, the Y-component is the vertical line or vertical component. The value of the y-component of the vector plotted is 1.

Therefore, the correct option is A.

Learn more about Vector here:

https://brainly.com/question/29740341

#SPJ7

Answer:

(B) 15 N.m

Explanation:

The deceleration of the wheel is first found by using the following formula:

[tex]\alpha = \frac{\omega_f - \omega_i}{t}[/tex]

where,

α = angular acceleration = ?

ωf = final angular speed = 0 rad/s

ωi = initial angular speed = 12 rad/s

t = time = 0.4 s

Therefore,

[tex]\alpha = \frac{0\ rad/s - 12\ rad/s}{0.4\ s}\\\\\alpha = -30\ rad/s^2[/tex]

here, the negative sign shows deceleration.

Now, we find the torque responsible for this deceleration:

[tex]\tau = I\alpha[/tex]

where,

τ = torque = ?

I = rotational inertia = 0.5 kg.m²

Therefore,

[tex]\tau = (0.5\ kg.m^2)(30\ rad/s^2)\\[/tex]

τ = 15 N.m

Therefore, the correct answer is:

(B) 15 N.m

Answer:

Explanation:

The answer is 75 cm