Answer:
Hydrogen (H), a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements.
Explanation:
Answer:
It is a chemical element
Explanation:
NEED HELP ASAPTsunamis are often called tidal waves because they are caused by tides.
o True
o False
Answer:
false
Explanation:
a tsunami is almost always caused by an earthquake under water.
AFTER a ringing tuning fork passes very quickly in front of a stationary observer...
a) The sound waves are equally spaced out
b) The sound has a lower pitch
c) The sound waves have equal amplitudes
d) all could apply
Read the passage.
The moon is one-fourth the size of Earth, and the moon’s gravity is about one-sixth of Earth’s. Less gravity and no atmosphere means that objects travel farther when thrown on the moon.
Based on the information provided, what visual information would be most helpful to include with the passage?
a chart comparing the sizes of the moon and the Earth
a diagram showing how gravity affects the path of a thrown object
a photograph of a child throwing a ball for a dog to catch
a graph comparing distances traveled by objects thrown on Earth and the moon
its d
Answer:
d in my opinion is the most opitmal answer
Explanation:
aka a graph comparing distances traveled by objects thrown on Earth and the moon
Answer:
Its d
Explanation:
a graph comparing distances traveled by objects thrown on Earth and the moon
What special component would you need to use in a thermostat so that it can respond to changes in temperature
Answer:
A thermistor is an electrical device, a thermally sensitive semiconductor resistor, whose resistance changes in response to temperature. Thermistors are made in a variety of ways including thin films (SiC).
Explanation:
hope it helps
What name is given to the turning effect of a force?
Answer:
The turning effect of a force is known as the moment. It is the product of the force multiplied by the perpendicular distance from the line of action of the force to the pivot or point where the object will turn. When undoing a nut fastened to a screw by hand one realises that the amount of force required is a lot greater than when undoing the same nut using a spanner.
Explanation:
A student observes a shadow move across the sun during a solar eclipse. Which list represents the position of Earth, the sun, and the
moon during this event?
A.sun, Earth, moon
B.moon, sun, Earth
C.Earth, sun, moon
D.sun, moon, Earth
The position of the Earth, Sun, and moon during the solar eclipse, a student observes a shadow moving across the sun is Sun, moon, Earth, so option D is correct.
What is a solar eclipse?When the Moon passes in front of the Sun, blocking all or part of Earth's view of it, a solar eclipse occurs. The Moon is closest to the plane of the Earth's orbit when there is a new moon and such an alignment. During a total eclipse, the Moon fully obscures the Sun's disk. Partial and annular eclipses only block out a section of the Sun. A solar eclipse occurs naturally. Solar eclipses were sometimes linked to supernatural sources or interpreted as an ill omen in several ancient and modern societies.
During a solar eclipse, the moon comes in between the earth and the sun therefore the shadow moves across the sun during a solar eclipse observed by the student, the position is Sun, moon, and earth.
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As a cold air mass advances on a warm air mass, what usually comes before it?
Answer: A cold front occurs when a cold air mass advances into a region occupied by a warm air mass. If the boundary between the cold and warm air masses doesn't move, it is called a stationary front.
Explanation: Two types of occluded front exist: the warm-type and the cold-type. They’re distinguished by the relative temperatures of the air mass ahead of the occlusion – in other words, the air mass ahead of the original warm front – and the air mass behind the cold front. If the air behind the cold front is colder than the air ahead of the occlusion, it shoves beneath that air (because it’s denser) to form a cold-type occluded front. If the air behind the cold front is warmer than the air ahead, it rides over it to form a warm-type occluded front – which appears to be the more common case. In either situation, the lighter warm air representing the air mass originally between the warm and cold fronts sits above the boundary between the two cooler air masses.
Hope this helps!!
Element Type of ion formed in a chemical reaction
Phase at room
temperature
Reactivity
W
positive
solid highly reactive
X
does not form ions
gas non-reactive
Y
negative
gas highly reactive
Z positive liquid
somewhat reactive
Using your knowledge of periodic properties and trends, how would these elements BEST be classified and why?
A.
Elements W and Z are nonmetals, Elements X and Y are metals, but Element Y is in Group 1 (alkali metal).
B.
Elements W and Z are metals, Elements X and Y are nonmetals, but Element Y is in Group 18 (noble gas).
C.
Elements W and Z are metals, Elements X and Y are nonmetals, but Element X is in Group 18 (noble gas).
D.
Elements W and Z are nonmetals, but Element W is in Group 17 (halogen). Elements X and Y are metals.
Answer:C
Explanation:
Which magnets need electric current for magnetism?
Answer:An electromagnet is a magnet that works with electricity. It can be switched on and off. The coils are nearly always made of copper wire because copper is such an excellent electrical conductor. Electromagnets have many uses.Permanent magnets are mainly used in small generators, and they have the advantage that they don't need a power supply. Electric magnets are iron or steel wound with wire. When electricity passes through the wire, the metal becomes magnetic and creates a magnetic field.
Explanation:
What type of Circuit do they use in a home? WHY ? (Simple circuit / Parallel circuit / Series circuit) helpp
Answer:
Parallel
Explanation:
Most standard 120-volt household circuits in your home are (or should be) parallel circuits. Outlets, switches, and light fixtures are wired in such a way that the hot and neutral wires maintain a continuous circuit pathway independent from the individual devices that draw their power from the circuit.
Hope that helps :)
In terms of activation energy, why does increasing the temperature of a reaction make it proceed more quickly? A. Increasing the temperature increases how many reactant molecules reach activation energy. B. Increasing the temperature reduces the activation energy C. Increasing the temperature increases the potential energy of the reactants D. Increasing the temperature makes the molecules move slower.
Answer:
A. Increasing the temperature increases how many reactant molecules reach activation energy.
Explanation:
The correct statement is " Increasing the temperature increases how many reactant molecules reach activation energy"
What is activation energy?"Activation energy is the minimum amount of energy that must be provided to molecules /atoms of the compounds/ elements to result in a chemical reaction."
When temperature increases the kinetic energy of the molecules increases hence more reactant molecules reach the activation energy.
So it can be concluded that by Increasing the temperature increases how many reactant molecules reach activation energy.
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What is the frequency of a raido wave with a wavelength of 1.0 mm?
Answer:
3×10^6
Explanation:
frequency is the speed of light ( c) which is a constant number divided the wavelength
f = 3×10^6 / 1.0
1. What is the difference between thermal energy and heat? Give an example.
Answer:
when you run u get tied
Explanation:
I do not now this one
What does each system help you do?
1 Somatic Nervous System
2 Autonomic Nervous System
3 Sympathetic Division
4 Parasympathetic Division
5 Hormones
Explanation:
1.The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.
2. The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions, such as the heart rate, digestion, respiratory rate, pupillary response, urination, ect...
3. Sympathetic Division is a term used by researchers and medical practitioners to describe the subdivision of the autonomic nervous system (that controls involuntary and automatic physical reactions) that responds to emergency situations by mobilizing and controlling the energy necessary to cope with the situation.
4. The part of the autonomic nervous system that tends to act in opposition to the sympathetic nervous system, as by slowing down the heart and dilating the blood vessels. It also regulates the function of many glands, such as those that produce tears and saliva.
5. a regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.
physics help pleaseee
Answer:
the first questions answer is- the pressure is the same (balanced) outside and inside the window.
the second questions answer is- the atmospheric pressure increases.
Explanation:
I hope that this is what you were looking for.
A 3500 N is force is applied to a spring that has a spring of constant of k= 14000 N/m. How far from equilibrium will the spring be displaced?
Answer:
the spring be displaced by 25.0 cm
Explanation:
The computation is shown below:
As we know that
F= -K × x
So,
[tex]x = \frac{-F}{K}[/tex]
Now
[tex]x = \frac{-3500}{14000} \\\\[/tex]
= -0.250m
= 25.0 cm
Hence, the spring be displaced by 25.0 cm
The atomic number is always equal to the total number of which is also equal to the total number of
Answer:
Protons; electrons.
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such defines the structure of a chemical element.
Generally, these atoms are typically made up of three distinct particles and these are protons, neutrons and electrons. All the physical properties of a mineral result from the mineral's internal arrangement of atoms.
The atomic number is always equal to the total number of protons, which is also equal to the total number of electrons. Protons are the positively charged particles that make up an atom while electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
A chemical element is denoted by [tex] X_{Z}^{A} [/tex]
Where;
X is the symbol of the element.
A is the atomic mass or number of nucleons.
Z is the atomic number or number of protons.
Therefore, the number of neutrons = A - Z
pls pls pls pls help!!!!!
A 96 kg man is standing in an elevator. The man experiences a net force when the elevator moves at an acceleration of 4.0 m/s2 upward and downward. Find both net forces
Answer:
The net upward force the man experiences is approximately 1,324.8 N
The net downward force the man experienced is approximately 556.8 N
Explanation:
The given mass of the man, m = 96 kg
The acceleration of the elevator, a = 4.0 m/s²
According to Newton's third law of motion which states that action ad reaction are equal and opposite, when the elevator moves upwards, we have;
The net force the man experiences, F = Gravitational force, m·g + The force of the elevator pushing upwards, m·a
∴ ↑F = m·g + m·a
Where;
F = The net force the man experiences
m = The mass of the man = 96 kg
g = The acceleration due to gravity ≈ 9.8 m/s²
a = The acceleration of the elevator = 4 m/s²
∴ ↑F = 96 kg × 9.8 m/s² + 96 kg × 4 m/s² ≈ 1,324.8 N
The net upward force the man experiences ≈ 1,324.8 N
When the elevator moves downwards, we have;
The net force the man experiences, F = Gravitational force, m·g + The loss of the gravitational force as the floor moves further downwards, -(m·a)
∴ F = m·g + -(m·a) = m·g - m·a
F = m·g - m·a
∴ ↓F = 96 kg × 9.8 m/s² - 96 k × 4 m/s² ≈ 556.8 N
The net downward force the man experienced ≈ 556.8 N
A 110 kg football player runs at 8 m/s and plows into an 80 kg referee standing on the field causing the referee to fly forward at 5.0 m/s. What is the momentum of the football player before the collision?
Find:
Given:
Relationship:
Solution:
Answer:
MOMENTUM of the football player before collision is 110×8 =880
Explanation:
Why would you consider Joule’s early experiments with electric motors important even though he did not
achieve his goal?
Answer:
It counts as a learning experience
Explanation:
He can learn from his mistakes and take important steps to achieve his goal In the future.
Setting objectives can lead to better direction, enhanced attention, higher levels of motivation, and increased productivity. You may change your behaviours, mindset, confidence, and daily activities by setting clear, measurable goals.
What important even though achieve his goal?More essential than monetary or material rewards is achievement. Greater personal satisfaction comes from completing the task or reaching the goal than from being praised or recognized.
Additionally, crucial is commitment. It is less probable that you will succeed if you don't give your aim your all. This enables you to change your future expectations and strategy.Feedback enables you to discover your strengths and weaknesses.
Therefore, people who are driven by achievement are always looking for methods to do things better.
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Listed in the Item Bank are individual steps that need to be ordered. To find out more information about steps, some have more details
available when you click on them. Drag and drop the steps in the proper order by placing each in its corresponding open rectangle. Be sure
that the earliest step is placed next to the number 1.
Answer:
radio
microwave
Infrared
Visible
Ultraviolet
X-ray
Gamma ray
I hope this helps you a little bit
Identify the order of The Sun, Moon, and Earth During a solar and lunar eclipse.
Answer:As the Earth rotates on its axis and revolves around the Sun, day and night and seasons result. When the new moon comes between the Earth and the Sun along the ecliptic, a solar eclipse is produced. When the Earth comes between the full moon and the Sun along the ecliptic, a lunar eclipse occurs.
Explanation:
A square brass plate has large circular hole cut in its centre. If the plate is heated, it will expand. Will the diameter of the hole expand or contract? Explain your answer.
How the choice of building materials and techniques can help them cool down faster, after heating up.
Answer:
The choice of building materials and techniques can help them cool down faster, after heating up is explained below in brief details.
Explanation:
Building materials
Buildings that are composed of rock, bricks, or pavement, or inserted into the territory, can seem cooler thanks to the great "thermal mass" of these elements – that is, their capability to assimilate and discharge heat gently, thereby softening temperatures over time, producing daytime cooler and night-time warmer.
What can scan tiny details inside the human body by using principles of electromagnetism.
Answer:
magnetic resonance imaging (MRI)
A box has a mass of 6.0 kg. What is its weight on the mars, where the acceleration due to
gravity is 0.38 times that on Earth? *
Answer:
The weight of the box is 22.38 N.
Explanation:
The weight (W) of the mass is given by:
[tex] W = mg [/tex]
Where:
m: is the mass of the box = 6.0 kg
[tex]g_{m}[/tex]: is the acceleration due to gravity of mars
Since the acceleration due to the gravity of mars is 0.38 times that on Earth we have:
[tex]g_{m} = 0.38g_{E} = 0.38*9.81 m/s^{2} = 3.73 m/s^{2} [/tex]
Hence, the weight of the mass is:
[tex] W = mg = 6.0 kg*3.73 m/s^{2} = 22.38 N [/tex]
Therefore, the weight of the box is 22.38 N.
I hope it helps you!
What will happen when two neutral objects are rubbed together?
Answer:
I hope this will help you
Explanation:
When two neutral objects come into contact--especially in a dry environment--electrons can be knocked loose from one object and picked up by the other. The object that gains electrons becomes negatively charged, while the object that loses electrons becomes positively charged. Objects with like charges repel each other, while those with opposite charges attract each other. This phenomenon--in which objects acquire an electric charge and exert a force on one another--is what we call static electricity.
What happens as a bungee jumper gets closer to Earth's surface?
A. Gravity decreases
B. His mass increases
C. Air resistance decreases
D. His velocity increases
Answer:
Velocity increases
Explanation:
Gravity is constant, except when discussing "apparent weight"
Mass is constant here
Air resistance would actually increase
Velocity DOES increase, because Earth is pulling the jumper downwards with an unbalanced force. The unbalanced force creates acceleration (-9.81 m/s^2), which means his velocity is increasing constantly.
1. A satellite (mass = 4.44 x 109 kg) travels in orbit around the Earth at a distance of 1.9 x 10'm above
Earth's surface. What is the force of gravitational attraction between the satellite and Earth?
Answer:
The force of gravitational attraction between the satellite and Earth is [tex]2.587\times 10^{10}[/tex] newtons.
Explanation:
Statement is incorrect. Correct statement is:
A satellite ([tex]m = 4.44\times 10^{9}\,kg[/tex]) travels in orbit around the Earth at a distance of [tex]1.9\times 10^{6}\,m[/tex] above Earth's surface. What is the force of gravitational attraction between the satellite and Earth?
The gravitational force experimented by the satellite ([tex]F[/tex]), in newtons, is calculated by Newton's Law of Gravitation, whose equation is defined by following formula:
[tex]F = \frac{G\cdot m \cdot M}{R^{2}}[/tex] (1)
Where:
[tex]G[/tex] - Gravitational constant, in cubic meters per kilogram-square second.
[tex]m[/tex] - Mass of the satellite, in kilograms.
[tex]M[/tex] - Mass of the Earth, in kilograms.
[tex]R[/tex] - Distance of the satellite with respect to the center of the Earth, measured in meters.
If we know that [tex]G = 6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}}[/tex], [tex]m = 4.44\times 10^{9}\,kg[/tex], [tex]M = 5.972\times 10^{24}\,kg[/tex] and [tex]R = 8.271\times 10^{6}\,m[/tex], then the force of gravitational attraction between the satellite and Earth is:
[tex]F = 2.587\times 10^{10}\,N[/tex]
The force of gravitational attraction between the satellite and Earth is [tex]2.587\times 10^{10}[/tex] newtons.
A biker travels at an average speed of 18 km/h along a 0.30-km straight segment of a bike path. How much time ( in hours)does the biker take to travel this segment?
Answer:
The biker will take "0.016 hours".
Explanation:
The given values are:
Average speed,
[tex]V_{avg}[/tex] = 18 km/h
Distance,
d = 0.30 km
As we know,
⇒ [tex]V_{avg}=\frac{d}{t}[/tex]
or,
⇒ [tex]t=\frac{d}{V_{avg}}[/tex]
On substituting the values in the above formula, we get
⇒ [tex]=\frac{0.30 \ km}{18 \ km/h}[/tex]
⇒ [tex]=0.016 \ hours[/tex]