Let each shake of the pennies or thumbtacks represent 1 year. what is the half life, in years, for the pennies in experiment 1? what is the half-life, in years, for the thumbtacks in experiment 2?

(5.4.3 lab - nuclear physics)

The acceleration of a train that takes 22 seconds to go from a speed of 73 kilometers per hour to a speed of 45 kilometers per hour is 0.354 m/s².

Acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.

Acceleration is a change in velocity divided by a change in time. Given the time of 22 seconds and the distance is 73 kilometers. The speed is 45 k/h

(73 - 45 ) = 28 km / hr  

Change in velocity = 7.778 m/s

7.778 m/s / 22 s  = 0.354 m/s².

Therefore, the acceleration of a train is 0.354 m/s².

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Answer:

Below

Explanation:

73 km / hr = 20.277 m/s     and     45 km/hr = 12.50 m/s

Acceleration = change in velocity / change in time

                      (12.5 - 20.277) m/s  / 22 s =  - . 354 m/s^2  

                           ( NOTE the negative sign....this is a DEceleration)

Answer:

See below ~

Explanation:

The answers are

Sun

precipitation

run off

evaporation

seapage

condensation

Answer/Solution

I hope it help.

Aluminium is far powerful and reactive than hydrogen so it will displace H_2 easily.

The reaction becomes

Balanced reaction

Answer:

The two philosophers furthermore seem to share the same conception of the conditions of human freedom. For Hegel as well as Kant, a theory of morality and political right devoted to advancing the cause of freedom must require more than just the absence of obstacles preventing the satisfaction of our animal passions.

Explanation:

Hope that help ;)

Answer: No, but yes

Explanation:

EXPLAIN IT

Charging by rubbing needs physical contact, and charging by sharing does not need any contact.

When the matter is put in an electromagnetic field, it has an electric charge, which causes it to experience a force. Similar charges repel each other, whereas dissimilar charges attract each other.

An electrical charge is created when two distinct insulating materials are rubbed together.

Charge sharing is a signal degradation phenomenon that occurs when charges are transferred from one electronic domain to another.

Electrostatics is the phenomenon of charging by rubbing, whereas induction is the phenomenon of charging by sharing.

Hence, charging by rubbing needs physical contact, and charging by sharing does not need any contact.

​

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Dendrimers are the form of nanotechnology is most likely to help improve brain imaging.

Nanotechnology is the near-atomic manipulation of matter to create new structures, materials, and gadgets.

The technique offers scientific improvement in a variety of fields, including medical, consumer goods, energy, materials, and manufacturing.

Dendrites are a kind of nanoparticle that has been studied extensively for a variety of medicinal applications, including medication administration, imaging, and diagnostics in the brain.

Hence,dendrimers are the form of nanotechnology is most likely to help improve brain imaging.

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Answer:

B. Quantum Dots

Explanation:

Nanotechnology with quantum dots allows for better imaging while examining the body.

Answer:

It orbits our sun is the correct answer

Sagittarius A* is 26,000 light-years away from earth. Hence, option (C) is correct.

Sagittarius A* (Sgr A*), a supermassive black hole at the center of the Milky Way Galaxy with a mass equal to four million Suns, is seen in the constellation of Sagittarius. It is a powerful radio source that is a part of the larger Sagittarius A complex.

One of Chandra's largest observing missions to date led to these new discoveries. In order to obtain the first-ever X-ray photos and energy fingerprints of the multi-million degree plasma swirling around Sgr A*, a black hole with around 4 million times the mass of the Sun, Chandra made observations over the course of nearly five weeks in 2012.

Sgr A* is one of the very few black holes in the cosmos where we can really observe the flow of stuff close by, and it is only 26,000 light years away from Earth.

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Answer:

B

Explanation:

Depends Mostly on bonds electrolysis can be used, chemical bonding like additional of water or by heating back to their elements.

Answer:

Hydrated iron(III) oxide, or ferric oxide

Explanation:

This happens at Sun 's inside

This denotes to

It releases lots of solar energy which can be used to create electricity

The product label which Mateo should place in the marked cell is that it: B. provides electrical energy.

A product label refers to a paper-document which contains information about the chemical elements, nutrients, and other compounds that are present in a product and its function.

In this scenario, the product label which Mateo should place in the marked cell is that this product was designed and developed to provide electrical energy, based on the electrical symbol for battery shown in the image attached below.

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Answer:

The resistance is 2 ohms

Answer:

Earth rotates eastward, in prograde motion. As viewed from the north pole star Polaris, Earth turns counterclockwise.

The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.

Earth's axis is an imaginary pole going right through the center of Earth from "top" to "bottom." Earth spins around this pole, making one complete turn each day. That is why we have day and night, and why every part of Earth's surface gets some of each. Earth has seasons because its axis doesn't stand up straight.

Earth and sun are part of the solar system, with the sun at its centre. An Earth day is 24 hours because the Earth spins on its axis once every 24 hours. At any one time half of the Earth's sphere is in sunlight (day) while the other half is in darkness (night).

The Earth's axis runs from the North Pole to the South Pole. It takes the Earth 24 hours, or one day, to make one complete rotation around this invisible line. As the Earth rotates, each area of its surface gets a turn to face and be warmed by the sun. This is important to all life on Earth

Answer:

1 Conditions that result in the emission of electrons from a conductor:

Heating the conductor to a suitable temperature

Exposing the conductor to a strong light

Subjecting the conductor to a very high applied voltage

Subjecting the conductor to high-speed electrons from another source

2 Both diodes and triodes influence current flow and contain electrodes. Diodes involve only two active pieces; triodes contain three electrodes within a tube. Current can flow through a diode in only one direction. Diodes tend to act as rectifiers. In a triode, the third electrode is a grid located between the cathode and the anode. A small difference of potential between the grid and the cathode controls the number of electrons that reach the anode. Adjusting the charge on the grid affects the number of electrons that can reach the anode. Triodes tend to act as amplifiers.

3  a Transmitting antenna

b Modulator

c Oscillator

d Microphone

4  a RF amplifier

b Receiving antenna

c Loudspeaker

d Demodulator

e Tuner

5 hue, saturation, intensity/brightness

6 red, blue, green

Explanation

PF right from PF all 6 answers

There are four main ways in which electrons are emitted from the conductor including Thermionic emission, Electric field electron emission,  Photoelectric emission, and Secondary emission.

A conductor is a substance or material which allows electricity to flow through it. In a conductor, the electrical charge carriers, usually electrons or ions or charged particles, move easily from one atom to another atom when the voltage is applied.

Thermionic emission involves large amount of external energy in the form of heat is supplied to release free electrons from the metal.

In the electric field electron emission, electrons are emitted from the metal surface when the metals are placed in a very strong electric field.

During photoelectric emission, light is absorbed by the metals and this provides energy to the valence electrons in the conductor which break their bond with the parent atom and which are then released from the atom.

Valence electrons have kinetic energy, however they don't have enough energy to escape from the atom. During secondary emission, a high-speed electron from the conductor is bombarded with an atom, which provides energy for the valence electrons to break their bonds with their parent atom which are then released from the atom.

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Answer:

the answer is The lens forms a real image.

Explanation:

got it right on edge

Answer:

Hydrochloric acid and sodium hydroxide interact, resulting in salt and a release of heat. As we can see, the result of the interaction of two highly aggressive compounds is table salt and water – compounds that are ultimately harmless, even beneficial, to human beings.

Explanation:

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Why can you get a shock if you touch a metal doorknob after walking across a wool carpet is because you have gained neutrons; the doorknob has fewer electrons. This is further explained below.

Electrons can be defined as a stable subatomic particles with a negative electrical charge that is found in all atoms and serves as the major carrier of electricity in solids.

In conclusion, You have an unbalanced charge, while the doorknob is neutral. you have gained neutrons; the doorknob has fewer electrons.

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Answer:

when the ball falls down

Explanation:

because gravity is a very strong Force

Answer:

a

Explanation:a

Answer:

i = 0.483 A

Explanation:

B = [tex]\frac{U.i}{2pi*r}[/tex]

So, here the r is 0.225 m

The Magnetic field is 4.29 x [tex]10^{-7}[/tex] t

U. = 4π x [tex]10^{-7}[/tex] x i

4.29 x [tex]10^{-7}[/tex] = (4π x [tex]10^{-7}[/tex] x i) / (2π * 0.225)

Cutting  [tex]10^{-7}[/tex]

4.29 = [tex]\frac{4π * i}{2π * 0.225}[/tex]

4π and 2π canceled, left with 2

4.29 = [tex]\frac{2i}{0.225}[/tex]

4.29*0.225 = 2i

0.96525 = 2i

i = [tex]\frac{0.96525}{2}[/tex]

i = 0.482625 A

Rounding to 3 digits after decimal, we get

∴ i = 0.483 A

A ravine is a smaller version of a canyon that is typically formed by stream bank erosion. Ravines are greater in scale than gullies, but smaller than valleys.

A ravine is a  slope landform with relatively steep sides,Ravines may or may not contain active streams running along the down slope channel that produced them.

Ravine are frequently characterized by intermittent streams, since their geographic size is too small to maintain a perennial watercourse.

Hence, a ravine is a smaller version of a canyon that is typically formed by stream bank erosion.

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Answer:

It provides a more durable finish than liquid paints can offer, while still providing an attractive finish

Answer:

here

Explanation:

Lector

Resurrectionist

Switchboard Operator

Log Driver

milkmen

Lamplighter

Ratcatcher

Pre-radar Listener

ice cutter

human alarm clock

bowling pin setter

Answer:

Option 2

Explanation:

When something is acidifying on the pH scale, it generally means the pH is decreasing. Hence, the correct option for the question is :

Ocean acidification means the acidity of the ocean water is increasing

We know according to pH scale

So

the pH of oxygen is tending to 1 which is most acidic .

Hello!

We can use the equation of Newton's Law of Universal Gravitation to solve for the Force of Gravity:
[tex]F_g = \frac{Gm_1m_2}{r^2}[/tex]

Fg = Gravitational Force (N)
G = Gravitational Constant (6.67 × 10⁻¹¹ Nm²/kg²)

m1, m2 = masses (both 8.3 kg in this situation)

r = distance between the center of masses of the objects (0.165 m)

Plug in the given values and solve.

[tex]F_g = \frac{(6.67 \times 10^{-11})(8.3)(8.3)}{(0.165^2)} = \boxed{1.6878 \times 10^{-7} N}[/tex]

Answer:

You need to be careful when finding the true age of sedimentary rocks to understand its full history.

Explanation:

Answer:

An extreme redshift of emission lines that indicated high recessional

Answer:

i need help

Explanation:

Answer:

yes quite a few people love eating Pineapple on pizza

Answer:

yes, if you want pineapple be in pizza