help?? ASAP ill give brainlist

Answer:

:)

Explanation:

Answer:

The image behind the mirror is called a virtual image because it cannot be projected onto a screen—the rays only appear to originate from a common point behind the mirror. If you walk behind the mirror, you cannot see the image, because the rays do not go there

Answer:

acceleration of 3ms2

Explanation:

we can calculate the net force on the bowling ball from the above equation. Therefore, 30N of force is required to accelerate the bowling ball down the alleyway at a rate of 3ms2

Answer: false

Explanation:

the more active you are, the more calories you are burning. consuming less calories is not ideal, you need to eat more since you are burning more than normal.

Answer:False

Explanation:The more active you are, the more calories you burn. Calories are a form of energy and you need to regain that energy by eating more calories

Answer:

2,336,000

800,000 × 0.08 = 64,000

800,000 + (64,000×24)

Answer:

option c

Explanation:

6420/55

116.7

approximately 117

Explanation:

KE = mv2 b. Suppose Karl uses a different puck with. = (85.0 kg)(8.5 m/s) half the mass ... How will. = 3.1X103 J the kinetic energy and work differ from KE; + PE; = KE; + PE those in ... If the puck has half the mass, it still .

Answer:

3431.875 J or 3.432 kJ

Explanation:

Kinetic energy can be found using the equation m/2*v^2.

We know m and v and we can plug in those values to get the answer.

95/2 times 8.5^2 = 3431.875 J or 3.432 kJ.

Answer:

A light bulb has a resistance inside of it, when current flows through the resistance, the electrons interact with the electrons and particles inside the resistance. Those interactions leave energy in the resistance in the form of heat, so as the current flows through the resistance, the temperature of the resistance increases until the point it starts to become bright and starts radiating light (this happens really fast, that's why the light bulbs light up almost immediately)

When she puts the slider at position A, she reconnects a circuit. Now, for that circuit a current can flow, and pass through the resistance in the light bulb, this resistance heats up, and starts radiating light.

When she returns to position B, the circuit is not connected anymore. This means that the current flow stops, then there is no more current flowing through the resistance, then the resistance beggings to cool down, and stops radiating light.

α prєcípítαtíσn rєαctíσn rєfєrs tσ thє fσrmαtíσn σf αn ínsσluвlє sαlt whєn twσ sσlutíσns cσntαíníng sσluвlє sαlts αrє cσmвínєd. thє ínsσluвlє sαlt thαt fαlls σut σf sσlutíσn ís knσwn αs thє prєcípítαtє, hєncє thє rєαctíσn's nαmє. prєcípítαtíσn rєαctíσns cαn hєlp dєtєrmínє thє prєsєncє σf vαríσus íσns ín sσlutíσn.

A precipitation reaction is a chemical reaction in which two soluble salts (ionic compounds) in an aqueous solution (solution with water as the solvent) yield insoluble, solid salt, a precipitate, as one of the products. It is generally a double replacement reaction, in which there are two ionic compounds, and their ions switch (AB+CD yield AC+BD).

Example:

[tex]\mathbb{\green{Pb(NO_{3} )_{2} +2KI  ⇒2KNO_{3} +PbI_{2}}}[/tex]

N.B. The (s) indicates a solid (or precipitate), whereas (aq) means that the compound is dissolved in an aqueous (water-containing) solution.

Explanation:

yddzddydiiydiryxydiydyfiidydydydyyidydydiyidd

Answer:

W= m*g

5.4=9.8*m

mass = 0.55

Answer:

Air condenses and rises up

Answer:

That's because cooling your body via sweating relies on a principle of physics called "heat of vaporization." It takes energy to evaporate sweat off of your skin, and that energy is heat. As your excess body heat is used to convert beads of sweat into vapor, you start to cool down.

Answer:

sodium chloride

Explanation:

Plugging in for the Earth's mass and for G, we have 11.2 km/s for the escape velocity for an object launched from the Earth's surface. This is about 25,000 miles per hour

Answer:

idrk im jus here for the points[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n[/tex]∈ω≠≠

Explanation:

Answer:

A. In a closed system, the potential energy at the bottom is equal to the kinetic energy at the top.

Explanation:

According to the law of conservation of energy, energy is neither created nor destroyed but transformed from one form to another.

Based on the premise of the law of conservation of energy, both kinetic energy and potential energy are equal at the top and bottom in the system.

This way energy is conserved.

Answer:

the momentum is 50 kg m/s

Explanation:

The computation of the momentum is shown below;

As we know that

Momentum = mass × velocity

where

mass = 5 kg

And, the velocity is 10 m/s

So, the momentum is

= 5 × 10

= 50 kg m/s

Hence, the momentum is 50 kg m/s

[tex]E_c = \dfrac{mv^2}{2}[/tex]

[tex]E_c = \dfrac{25\cdot (5^2)}{2}[/tex]

[tex]E_c = 312.5 \text{ J}[/tex]

Answer:

A

Explanation:

Answer:

I beleive B because its on land and the tecnotic plates are moving opposite directions pulling the ground into a tear like hole

Explanation:

what happen when you take two sides of something and pull opposite directions right it tears the same will happen to the groung.

Answer:

468750 J

Explanation:

Kinetic energy = (1/2) (mass)(velocity)^2

The kinetic energy of the car with a mass of 1.5 × 10³ kg running with a speed of 25 m/s is 468750 J  .

Kinetic energy of an object is a form of energy generated by virtue of the motion of the object. Kinetic energy is dependent on the mass and velocity of the body.

When a body starts to move its potential energy starts to convert to kinetic energy and the kinetic energy will be maximum at the highest speed. When the object slow down and pause in a position it gains potential energy again.

The kinetic energy KE = 1/2 mv²

Given mass = 0.9 Kg

velocity = 4 m/s.

KE = 1/2 0.9 Kg × 4² m/s

    = 7.5 J

Therefore, the kinetic energy of the car is 7.5 J.

To find more on kinetic energy, refer here:

http://brainly.com/question/26472013

#SPJ2

Answer:

Ally has a harder time

ally takes more time

juan is quick

juan is more experienced

if none of those are awnser choices what are the awnser choices?

Explanation:

Answer:

i dont think its possible without a picture

Explanation:

Answer:

The answer is 7.5 M/s

Explanation:

The acceleration is not given so you should divide the mass by the force to acheive your answer :)

Answer:

velocity = 540m/s²

Explanation:

100cm = 1m

20cm= (20/100)m = 0.2m

velocity = 2700×0.2 = 540m/s²

Answer:

32.32857

Explanation:

Searched on the web

Answer:

k  = 51.09 N/m

Explanation:

Given,

mass, m₁ = 0.3 Kg

length of spring, x₁ = 0.27 m

Mass, m₂ = 2.80 Kg

Length of spring, x₂ = 0.750

We know that

Restoring force, F = k x

Gravitation force, F = m g

Now,

m₁ g = k x₁ ......(1)

And

m₂ g = k x₂   .......(2)

where k is spring constant

Subtracting equation (2)- (1)

(m₂-m₁)g = k(x₂-x₁)

(2.8-0.3) x 9.81 = k (0.75 - 0.27)

24.525 = k x 0.48

k  = 51.09 N/m

Hence, spring constant is 51.09 N/m.

Answer:

Q = 1086.75 [J]

Explanation:

We must use the following equation of thermal energy, which relates the specific heat to the mass and to the change in temperature.

[tex]Q=m*C_{p}*(T_{final}-T_{initial})\\[/tex]

Where:

m = mass = 15.75 [g]

Cp = specific heat = 0.46 [J/g*C]

Tfinal = final temperature = 175 [°C]

Tinitial = initial temperature = 25 [°C]

Now replacing:

[tex]Q=15.75*0.46*(175-25)\\\\Q= 1086.75[J]\\[/tex]