Answer:
B- 7
Explanation:
its how many elements, you don't need the amound of each element. you have to count the number of capitalized letters. Hope this helps!
A student wants to test the force of magnetism by placing objects on top of a piece of cardboard and then moving them with a magnet placed under the cardboard. Which items will help the student with this investigation?
Answer:
Any material that has ferromagnetic property
Explanation:
Materials such as iron, nickel or cobalt are ferromagnetic element as they behave as small magnets in the presence of moving electric charge or static magnetic field.
When an external magnetic field is applied these ferromagnetic material align in a way that they contribute to produce a stronger magnetic field in the material and remain aligned even after removal of the external magnetic field.
What is kinetic energy
Answer:
Kinetic energy, form of energy that an object or a particle has by reason of its motion. ... Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass.
Credits to britannica.com
Explanation:
Hope this helps
Kinetic energy of an object is the energy that it possesses due to its motion.
In order to generate electricity from mechanical energy, one essential element needed to
transform the energy into electrical energy is
A.an insulator
B.a magnet or a magnetic field
C. a plastic sphere
D. a light bulb
B: q magnet or a magnetic field
what happens to the brightness of the bulb when the resistor is increased?
Answer: As the variable resistance increases its resistance, the current which flow through the lamp will decrease and therefore its brightness decreases. ... If the resistors are very large, they have no impact and the lamps will be the same brightness.
Explanation:
Answer:
The intensity or brightness of the bulb increases as more dry cell is added in the circuit.
Explanation:
Hope it helps :)
What is the speed of a runner that runs 400m in 48.42 seconds?
Answer:
The speed is that it would take 121.05 seconds to run a kilometer.
Explanation:
Since there are 1000 meters in a kilometer, divide 400 meters by 4, and 48.42 by 4. Then you get 100 meters equals 12.105 seconds. Multiply that by ten, and you get 121.05 seconds
The three main types of nuclear radiation are alpha, beta, and gamma
Which of the following lists these types of radiation from highest penetrating power to lowest penetrating power?
beta, alpha, gamma
beta, gamma, alpha
ОООО
O gamma, beta, alpha
O alpha, gamma, beta
The correct order of these types of radiation from highest penetrating power to lowest penetrating power is gamma, beta, and alpha. The correct option is C.
Among gamma, beta, and alpha radiation, gamma radiation has the shortest wavelength. This is because gamma radiation consists of high-energy electromagnetic waves, similar to X-rays and light, but with even shorter wavelengths.
In terms of other properties:
Alpha radiation consists of particles called alpha particles, which are helium nuclei (two protons and two neutrons) that are emitted from the nucleus of an atom during radioactive decay. Alpha particles are relatively large and heavy, and they have a positive charge. They have a short range in air and can be stopped by a piece of paper or human skin, but they can cause significant damage to living tissue if they are inhaled or ingested.
Beta radiation consists of particles called beta particles, which are high-energy electrons or positrons that are emitted from the nucleus of an atom during radioactive decay. Beta particles are smaller and lighter than alpha particles, and they have a negative charge. They have a longer range in air than alpha particles, but they can be stopped by a thin sheet of metal or plastic.
Gamma radiation, as mentioned earlier, consists of high-energy electromagnetic waves. Gamma rays are similar to X-rays but have even higher energies and shorter wavelengths. Gamma rays have the longest range in air and require dense materials, such as lead or concrete, to stop them. Gamma radiation is the most penetrating of the three types of radiation and can cause damage to living tissue if exposure is prolonged.
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The two properties that are
parts of refraction are ...
Answer:
-Relative refractive index– It is the ratio of speed of light in one medium to the speed of light in another medium
-Absolute refractive index– It is the ratio of light in vacuum to the speed of light in another medium.
Explanation:
A una temperatura de 329°K una placa de aluminio tiene un área de 15 m2, si su temperatura disminuye hasta 288°K; ¿Cuál es el valor de su área final?
Answer:
El área final de la placa de aluminio es 14.971 metros cuadrados.
Explanation:
Para pequeñas deformaciones, la expresión para la dilatación de área es la siguiente:
[tex]A_{f} = A_{o} \cdot [1+2\cdot \alpha \cdot (T_{f}-T_{o})][/tex] (1)
Donde:
[tex]A_{o}[/tex], [tex]A_{f}[/tex] - Áreas inicial y final de la placa, medidas en metros cuadrados.
[tex]\alpha[/tex] - Coeficiente de expansión lineal, medido en [tex]\frac{1}{K}[/tex].
[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Temperaturas inicial y final de la placa, medidas en Kelvin.
Si sabemos que [tex]A_{o} = 15\,m^{2}[/tex], [tex]\alpha = 23\times 10^{-6}\,\frac{1}{K}[/tex], [tex]T_{o} = 329\,K[/tex] y [tex]T_{f} = 288\,K[/tex], entonces el área final de la placa es:
[tex]A_{f} = (15\,m^{2})\cdot \left[1+2\cdot \left(23\times 10^{-6}\,\frac{1}{K} \right)\cdot (288\,K-329\,K)\right][/tex]
[tex]A_{f} = 14.971\,m^{2}[/tex]
El área final de la placa de aluminio es 14.971 metros cuadrados.
Will the rocket go up or will it stay on the ground ? Explain the answer if you can also please and thank you.
Answer:
the rocket will go up
Explanation:
there is less force pulling down on the rocket.
100N > 75N
I WILL GIVE BRAINLIEST
This is science but there’s no science category
When does a solar eclipse occur?
When an object in space comes close to Earth's orbit
When an object in space gets too close to the sun
When an object in space comes between two planets
When an object in space comes between the sun and Earth
1. A Baltimore passenger train traveled 80 meters in 15 seconds. What was the average speed
of the train?
Show your work ! PLEASEEEE HELPPP !!
Answer:
45
Explanation:
The average speed of the train was 5.33 meter/second.
What is speed?Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.
Given parameters:
Distance travelled by the train is: d = 80 meters.
Time taken by the train: t = 15 seconds.
Hence, the average speed of the train =
total distance travelled/total time taken
= 80 meters/ 15 seconds.
= 5.33 meter/second.
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If two forces are acting on an object , one is 25N west, and the other is 50N east. Calculate the net force.
Answer:
Explanation:
Since the forces are only in the x-direction, you could just add the two forces. The West is to the left, so it would be -25N with the negative sign indicating direction. The East is to the right, so that would be +50N.
50 + (-25) = 25N to the right or the positive i-hat direction
Substances which naturally attract each other called what
Answer:
Ferromagnetism, physical phenomenon in which certain electrically uncharged materials strongly attract others. Two materials found in nature, lodestone (or magnetite, an oxide of iron, Fe3O4) and iron, have the ability to acquire such attractive powers, and they are often called natural ferromagnets.
Hope this help :)
High exposure to which type of electromagnetic radiation can cause genetic
mutations?
A. Ultraviolet
B. Visible light
C. Microwaves
D. Infrared
Answer:
A. Ultraviolet
Answer: A.Ultraviolet
Explanation:
just did it
Sodium and phosphorus combine to form Na3P. What is the name of this compound? phosphorus sodiate phosphorus sodide sodium phosphate sodium phosphide
Answer:
Sodium phosphide
Explanation:
Answer:
sodium phosphide
Explanation:
i just took the test. Good luck!! Have a great day!!
A car drives in a circle at 56 km/hr. Which of
the following accurately describes the
motion of the car? The car's -
speed and velocity are both constant.
velocity is constant but speed is changing.
speed is constant but velocity is changing.
speed and velocity are both changing.
Answer:
Speed is constant but velocity is changing
Explanation:
Speed is a scalar quantity, meaning magnitude only. Velocity is a vector quantity, meaning magnitude and direction. If you're moving in a circle at a constant speed, the speed is constant but the direction is constantly changing. Therefore, the speed is constant but velocity changes.
What is the net force on this box?
100 N
80N
90 N
110
100 N
Answer:
where is the box? how can we answer if your question is lack given? how do we know what box is it your talking about
Directed Reading for Overview
Content Mastery
Forces and Newton's Laws
Directions: Complete the concept map using the terms listed below.
pushes and pulls
Newton's Laws
inertia
acceleration
unbalanced
mass
pairs
gravity
1.
and
forces
such as
when they are
7.
2.
they
generate
which is a
force of
attraction
motion
between two
objects with
can be measure by
4.
8.
3.
describes
which is a
measure
of
relates force,
mass and
describes
forces in
5.
6.
Select the correct sequence of steps for lighting a Bunsen burner?
A. Apply the spark above the barrel of the Bunsen burner.
B. Open the gas adjustment at the base of the Bunsen burner.
C. Connect the burner hose to the gas outlet.
D. Open the gas valve on the gas outlet
D. C, A, B
C, A, D, B
C, D, A, B
C, D, B, A
Answer:
CDBA
Explanation:
Just did it on Study island
The correct sequence of steps for lighting a Bunsen burner would be C, D, B, A, therefore the correct answer is option D.
What is thermal energy?Thermal energy sometimes referred to as heat energy, may be described as the type of energy in which heat is transmitted from one body to another body as a result of their molecular motions.
The following would be the proper procedure for lighting a Bunsen burner:
Link the gas outlet and the burner hose.
The gas output valve should be opened.
Open the Bunsen burner's base-mounted gas adjustment valve.
The Bunsen burner's barrel should be covered with the spark.
Thus, the right response is option D since the proper stages to ignite a Bunsen burner are C, D, B, and A.
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Use what you have learned in the reading to answer the following question. The point of a compass needle points to Earth’s north pole. The point in the compass needle has–
~the same polarity as Earth's north pole.
~the opposite polarity from Earth’s north pole.
~no polarity.
~unlimited polarity.
The point in the compass needle has the opposite polarity from Earth’s north pole. The correct option is B.
What is a compass needle?The compass needle A magnetized pointer within a compass that can freely align with the Earth's magnetic field.
The magnetic needle is the most important part of the compass. It swings around the compass as you move, but the red end always points north and the white (or sometimes black) end always points south.
If you mean the geographical North Pole, the needle would point south because that is the only way to get there; more specifically, it would point south along the 112.4 degrees west longitude meridian towards the magnetic north pole at 82 degrees north, where compasses point.
Thus, the correct option is B.
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Why does a slinky wave eventually stop? Where did the energy go?
Answer:
Grades ... gravity affects them and the potential energy is converted into kinetic energy. Watching a Slinky move down the stairs or vibrating while ... and kinetic energy, and finally into sound waves.
Explanation:
Answer:
A wave as seen above will start losing energy by transferring it to kinetic and rotational energy at the shallow bottom including sand transfers, which finally will become heat (extra kinetic energy). ... In the end all energy will end up as a higher temperature in the region and ground than if the ocean were calm.
Explanation:
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What happens to kinetic energy when potential energy increases?
Which statement about a burning match is an inference?
A. The flame is yellow.
OB. The match is turning black.
OC. Oxygen is being consumed.
OD. The match is getting shorter.
Answer:
d
Explanation:
d hence the problem is
An example of a single displacement reaction is
Answer:
CL2+H2O----------->2HCL+[0]
How can a volcano develop in the middle of a tectonic plate?
Answer:
Volcanoes that form away from plate boundaries are created by hotspots. A hotspot is an area in the mantle that is believed to be somewhat hotter than the surrounding material. The rising magma from the hotspot can push its way through the crust and burst out at the surface, forming a volcano.
Explanation:
Volcanoes can form in subduction zones, which are regions where tectonic plates are interacting one and plate is sinking beneath the other.
Essay about how volcanoes form.A volcano is a hill or mountain in the shape of a cone that is erected around a fissure in the surface of the earth thru which heated gases, rock fragments, and lava are released. A conical mass grows around the conduit as the solid fragments gather there, becoming progressively larger until it reaches the size of a gigantic volcanic mountain.
Explain what a volcano is.A volcano is an aperture or vent through which magma, tephra (small rocks), or steam are released onto the the planet's surface. Days, weeks, or even years might pass between outbursts of volcanoes.
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Which circuit element controls the flow of current?
Answer:
REGULATOR
Explanation:
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loop od death cause and effect
Answer:true
Explanation:
A wave in which the particles of the medium move up and down as the wave passes through is a transverse wave or a
a longitudinal wave
Answer:
transverse waves
Explanation:
this is because the definition of transverse waves is transverse waves are waves that travel perpendicular to the direction of the wave motion
however the definition of longitudinal waves is that longitudinal waves are waves that travel parallel to the direction of the wave motion.
so you can see the parallel means it forms compressions and rarefactions
but perpendicular means the particles will move up and down to the straight horizontal line, that's how lines are perpendicular right? ,
so the answer is transverse wave
hope this helps
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A 40 W lightbulb plugged into a 120V line lights up. What resistance would the lightbulb have to have?
P=40 W
U=120 V
R=?
P=U*I
I=U/R
P=U²/R
R=U²/P
R=120²/40
R= 360 Ω