Answer: 15
Explanation:
The mass of the ion is the sum of the protons and neutrons inside its nucleus.
i.e Mass number = protons + neutrons
Mass number = 8 protons + 7 neutrons
= 15
Furthermore, since the number of protons differ from the number of electrons by 2, the ion was formed when its atom gained 2 electrons. Thus, it is a negatively charged ion (anion) with a mass of 15
Galileo's discovery shows that, to an observer on Earth, Venus has phases just like Earth's moon. How did this observation provide support for the heliocentric model of the solar system?
Galileo's discovery shows that, to an observer on Earth, Venus has phases just like Earth's moon. This observation provide support for the heliocentric model of the solar system as follows:
Galileo noticed the Moon is not flat, but rocky and rugged-just like the Earth did. He used his telescope to observe the Venus phases. Galileo's findings confirmed his confidence in the concept of Copernicus that Earth and remaining planets revolve around the Sun, i.e. Heliocentrism.While most individuals in Galileo's days assumed that the Earth was the center of the universe and that the Sun and planets revolved around it, i.e. geocentrism.The idea of geocentric was generally preferred by the prominent and strong Catholic Church, and when Galileo started writing papers on his belief in a heliocentric with a valid explanation, he was called to Rome to face the inquisition's charges towards him.Thus in early 1616 he was accused of being a heretic, but later he cleared of charges of "heresy" with warning that he should not spread his belief.But he pursued his astronomy research, and was increasingly confident that all planets revolved around the Sun. Therefore he published a book in 1632 which explained that Copernicus' heliocentric theory was appropriate.Thus after this finally he was charged by "heresy" and sentenced to life imprisonment in 1633, but due to his poor health he lived imprisonment under house arrest and finally died on January 8, 1642.Galileo's observation that Venus has phases supported the heliocentric model because this could only occur if Venus was orbiting the Sun, as predicted by the heliocentric model. The observation contradicted the geocentric model, which predicted that Venus would always appear in the same phase.
Explanation:Galileo's observation that Venus has phases like the Moon was crucial in supporting a heliocentric model of the solar system. In the heliocentric model, the Earth and other planets revolve around the Sun. If this model was correct, Venus should show different phases as it moves around the Sun, similar to our Moon's phases as viewed from Earth. Conversely, in a geocentric model, where Earth is at the center of the universe, Venus would always be seen in the same phase, which was contrary to Galileo's observations. Therefore, Galileo's findings gave strong support to the heliocentric model, further solidifying the theory which is accepted as fact today.
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2. How much work does it take to accelerate a 6.6 kg object from rest to 22 m/s?
O a) 73 J
b) 960 J
c) 1600J
d) 3200 J
e) 0.30 J
Answer:
c) 1600 J
Explanation:
Work = change in energy
W = ½ mv²
W = ½ (6.6 kg) (22 m/s)²
W = 1600 J
The work done to accelerate a 6.6 kg object from rest to 22 m/s is calculated using the work-energy principle and is approximately 1600 Joules.
The student is asking how much work is required to accelerate a 6.6 kg object from rest to 22 m/s. To solve this, we can use the work-energy principle, which states that the work done on an object is equal to the change in kinetic energy. The equation for kinetic energy (K) is K = (1/2)mv², where m is mass and v is velocity.
First, calculate the initial kinetic energy at rest, which would be zero, since the velocity is zero. Next, calculate the final kinetic energy using the formula with the given mass (6.6 kg) and final velocity (22 m/s).
K = (1/2)(6.6 kg)(22 m/s)² = (1/2)(6.6 kg)(484 m²/s²) = 1587.6 J. Therefore, the work done to accelerate the object is approximately 1600 J, matching option (c).
Which of the following structures has function in both the female reproductive and urinary systems?
A)Urethra
B)Ovary
C)Fallopian tube
D)Kidney
Answer:
in men it is the Urethra.. it is not the same in woman but that is the most likely, I do not know of any of them being right but i may be wrong.
Explanation:
The location(s) an electron can occupy around the nucleus depends on the electron's ____________.
A.energy
B.volume
C.mass
The location an electron can occupy around the nucleus depends on the electron's energy or the energy level in which it is present.
What is an energy level?Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.
Energy of the stationary state is given as E= -R
1/n² where R
is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.
They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.
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Final answer:
The location an electron can occupy around the nucleus depends on its energy. Electrons are described as occupying regions of space called orbitals, and these orbitals are determined by the electron's energy. The energy levels of the orbitals are primarily determined by the principal quantum number and the electrostatic potential produced by the nucleus and other electrons.
Explanation:
The location an electron can occupy around the nucleus depends on the electron's energy. In the current model of the atom, electrons are described as occupying regions of space called orbitals, which are determined by their energies. The energy levels of the orbitals are primarily determined by the principal quantum number and the electrostatic potential produced by the nucleus and other electrons.
equations F= -kx F= m x a or F= m x g g= -9.8 m/s2 When a 0.50 kg-object is attached to a vertically supported spring, it stretches 0.10 m from the equilibrium position. Find k for the spring.
A.
49
B.
-49
C.
.050
D.
-0.05
Answer:
A. 49
Explanation:
It is always nice to draw a free body diagram to visualize what is going on. (Or that is what my physics teacher told me haha)
Since you are given F=mg, you can substitute your given values (g=-9.8 and m=0.5) to solve for force.
F = -9.8 x 0.5 = -4.9 N
Then substitute -4.9 N and your given displacement (x=0.1) into your given equation to solve for the spring constant (k).
-4.9=-k(0.1) = -4.9/0.1 = -49
-49 = -k, so -49/-1 = 49
k=49
The diagram shows a heating curve for a substance. Which segment shows the substance changing from a gas to a liquid?
X-Y
Y-X
W-X
X-W
Answer:
Y-X
Explanation:
Answer:
B
Explanation:
It is determined that a certain light wave has a wavelength of 3.012 ×10−12 m. The light travels at 2.99 ×108 m/s. What is the frequency of the light wave? (Round your answer to three significant figures.)
Answer:
[tex]f=9.9269\,\,10^{19} Hz[/tex]
Explanation:
Recall that the velocity (v) of a light wave is defined as the product of its frequency (f) times its wavelength ([tex]\lambda[/tex]) :
[tex]v=f*\lambda[/tex]
therefore, we can solve for the unknown frequency by dividing both sides of the equation by the frequency:
[tex]v=f*\lambda\\2.99\,\,10^{8} \frac{m}{s} = f *\,3.012\,\,10^{-12}\, m\\\frac{2.99\,\,10^8}{3.012\,\,10^{-12}} \frac{1}{s}=f\\ f=0.99269\,\,10^{20}\,\, \frac{1}{s}\\[/tex]
Since the units "1/second" are what we call Hertz (Hz), the answer can also be given as:
[tex]f=9.9269\,\,10^{19} Hz\,[/tex]
Answer:
f=9.93 × 1019 Hz
Explanation:
Use the relationship f=vλ to solve for frequency f. Substituting the known quantities yields:
f=vλf=2.99 × 108 m/s3.012 × 10-12 mf=9.926×1019
answer rounded off to 3 significant digits is
f=9.93 × 1019 Hz
2) If the initial velocity of an object is equal to a final velocity, what is the acceleration of the object?
Answer:
The acceleration is 0.
Explanation:
The formula for acceleration is:
a = (v-u)/t
If v and u are equal, thus it would be 0 when subtracted, and anything divided by 0 is 0.
Measurements of two electric currents are shown in the chart. A 3-column table with 2 rows titled Electric Currents. The first column labeled Current has entries X, Y. The second column labeled Volts has entries 1.5, 9. The third column labeled Amperes has entries 7.8, 0.5. Which best compares the two currents?
Current X has a greater potential difference, and the charges flow at a slower rate.
Current Y has a greater potential difference, and the charges flow at a slower rate.
Current X has a greater potential difference, and the charges flow at a faster rate.
Current Y has a greater potential difference, and the charges flow at a faster rate.
The answer is B - Current Y has a greater potential difference, and the charges flow at a slower rate.
I just took the quiz
The current X and Y share the relationship where Current Y has a greater potential difference, and the charges flow at a slower rate. Option B
What is currents?Generally, a flow of electricity is caused by the directed movement of electrically charged particles.
In conclusion, for a 3-column table with 2 rows titled Electric Currents. The first column labeled Current has entries X, Y. we say that Current Y has a greater potential difference, and the charges flow at a slower rate.
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Gravity is an ___________________________ force that pulls objects together.
Answer: Equal force
Explanation:
Which of the following is a good step in learning how to manage time?
A.
listing all the things that you do in your spare time
B.
making a list of your favorite activities
C.
determining how you use your time in a 24-hour period
D.
deciding which activities require the most time to complete
Please select the best answer from the choices provided.
A
B
C
D
Answer:
Answer is C
Explanation:
Brainliest please I really need it
2.Mike's car, which has a mass of 1,000.0 kg, is out of gas. Mike is trying to push the car to
a gas station, and he makes the car go 0.05 m/s/s. Using Newton's Second Law, you can
compute how much force Mike is applying to the car.
Answer:
Newton's second law of motion is F = ma, or force is equal to mass times acceleration. Learn how to use the formula to calculate acceleration.
Explanation:
Which 3 components must be used in order for a light bulb to light?
The three components used to a light bulb to light is wire, light bulb, and battery(power supply)
Explanation:
The light bulb has the metal base that is connected to the end of an electrical circuit.Then the metal circuits are attached to the wires.When a light bulb is connected to the power supply, the current flows from one metal to another. As the current flows the filaments get heated and the bulb started to glow
When a car is traveling 120 km/h how many times more kinetic energy would it have than if it were
traveling at 40 km/h?
Final answer:
A car traveling at 120 km/h will have 9 times more kinetic energy than if it were traveling at 40 km/h, due to the kinetic energy being proportional to the velocity squared.
Explanation:
When a car is traveling 120 km/h, it will have 9 times more kinetic energy than if it were traveling at 40 km/h. This is because kinetic energy (KE) is proportional to the square of the velocity (v), as represented by the formula KE = 1/2 mv².
Given that the speed increases from 40 km/h to 120 km/h, which is a factor of 3 (120/40 = 3), and knowing the square relationship, we square this factor (3² = 9) to find that the kinetic energy increases by a factor of 9. Thus, a car traveling at 120 km/h has 9 times the kinetic energy of the same car traveling at 40 km/h, illustrating the substantial impact of speed on kinetic energy.
In a wire AB, 25*10^21 electrons move from point A and B in 100 seconds. What is the current between A and B? What is the direction of this current?
Answer:
40 A, current is from B to A
Explanation:
The current in a wire is defined as:
[tex]I=\frac{q}{t}[/tex]
where
q is the amount of charge passing a given point of the wire in a time interval t
The charge passing through a given point can be written as
[tex]q=Ne[/tex]
where
N is the number of electrons
[tex]e=1.6\cdot 10^{-19}C[/tex] is the charge of one electron
So we can rewrite the equation as
[tex]I=\frac{Ne}{t}[/tex]
In this problem:
[tex]N=25\cdot 10^{21}[/tex] is the number of electrons
t = 100 s is the time interval
Substituting, we find the current:
[tex]I=\frac{(25\cdot 10^{21})(1.6\cdot 10^{-19})}{100}=40 A[/tex]
Moreover, the direction of a current is defined as the direction of positive charges moving. Here, the charge carriers are electrons (which are negatively charged), so the direction of the current is opposite to the direction of motion of the electrons: therefore, since the electrons move from A to B, the direction of the current is from B to A.
Which type of solute is least likely to dissolve in water
a. ionic
b. polar
c. nonpolar
d. alcohol
Answer:
nonpolar
Explanation:
Because no polar is a molecule like cholesterol
Non-polar solute is least likely to dissolve in water. So, the correct option is (C).
What are Polar and Non-polar solutes?A polar solute is defined as one that dissolves only in a polar solvent such that water is a polar solvent and polar solute can readily dissolve in water while non polar solute is defined as a molecule whose constituents There is no net charge on the atoms where non-polar solvents such as organic solvents dissolve non-polar molecules, as in some organic compounds.
Polar solutes molecules are the molecules with polar bonds are usually asymmetrical while Non-polar molecules are the molecules with non- polar bonds which are usually symmetrical.
Thus, Non-polar solute is least likely to dissolve in water. So, the correct option is (C).
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calculate the average speed of a car of it traveled 180km in 2.0hr
Answer:
1500m/s
Explanation:
d=180000
t=120
units have to be converted into SI Units
Average Speed = (Total distance)/(Total Time)
Average Speed= (180000)/(120)
do you think that the universe has a starting point and ending point? explain.
Answer:
No
Explanation:
I don't think the universe has a starting and ending point because the universe is vast and has not been fully discovered. I think that the universe is endless because all of the stars, planets, and galaxy's have yet to be found and the end or start of the universe is also yet to be discovered so I think that the universe could go on forever.
The universe's starting point is believed to be the Big Bang about 13.8 billion years ago, but whether it has an ending point is still unknown.
Explanation:The question of whether the universe has a starting point and ending point is a topic explored in the field of physics. According to the Big Bang theory, the universe began with a singularity approximately 13.8 billion years ago. However, it is currently unknown whether the universe will have an ending point.
One theory suggests that the universe will continue expanding forever, gradually growing colder and darker. Another theory proposes the possibility of a Big Crunch, where the universe would eventually collapse in on itself. Some scientists also speculate about the possibility of a cyclical universe, where the cycle of expansion and contraction repeats indefinitely.
It's important to note that these theories are still being studied and researched, and our understanding of the universe's origins and potential ending is continually evolving.
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Which has more potential
energy; a person waiting for
the roller coaster to go down
the hill or a your binder on your
desk?
A. person in roller coaster
B. binder on desk
I need help ASAP 30 points
Answer:
A. person in roller coaster
Explanation:
What causes the Sun’s rays to be direct or indirect?
Answer:
Direct sunlight reaches the Earth's surface when there is no cloud cover between the sun and the Earth, while cloud cover causes indirect sunlight to reach the surface. In gardening, sunlight falling directly on the plant is direct sunlight, while indirect sunlight refers to shaded areas.
Explanation:
The Sun's rays can be either direct or indirect based on the Earth's rotation and tilt on its axis. The rays are more direct when the Earth tilts towards the Sun causing summer, and more indirect when the Earth tilts away from the Sun, causing winter.
Explanation:The Sun's rays can be direct or indirect based on the rotation and tilt of the Earth on its axis. When the Earth's tilt angles towards the Sun, the rays hit the Earth more directly, typically causing summer. On the other hand, when the Earth's tilt angles away from the Sun, the rays have to pass through more of the Earth's atmosphere because they are coming in at an angle, so these rays are more indirect, causing winter. In simple words, whether the Sun's rays are direct or indirect is primarily caused by the way Earth tilts and rotates around the Sun.
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A 0.5kg stone moving north at 4 m/s collides with a 4kg lump of clay moving west at 1 m/s. The stone becomes embedded in the clay. What is the velocity (magnitude and direction) of the composite body after the collision?
Answer:
The velocity of the composite body is 0.99m/s 63.43° west of north.
Explanation:
Here the law of conservation of energy says that
[tex](1).\: \: m_1v_1cos(0)+m_2v_2cos(90^o)=(m_1+m_2)v_f cos(\theta)[/tex]
[tex](2).\: \: m_1v_1sin(0)+m_2v_2sin(90^o)=(m_1+m_2)v_f sin(\theta)[/tex]
where [tex]v_f[/tex] is the final velocity if the composite body, and [tex]\theta[/tex] is measured from west of north.
Putting in numbers and simplifying the above equation we get:
[tex](3).\: \: m_1v_1=(m_1+m_2)v_f cos(\theta)[/tex]
[tex](4).\: \: m_2v_2=(m_1+m_2)v_f sin(\theta)[/tex]
dividing equation (4) by (3) gives
[tex]\dfrac{ m_2v_2=(m_1+m_2)v_f sin(\theta)}{ m_1v_1=(m_1+m_2)v_f cos(\theta)}[/tex]
[tex]\dfrac{m_2v_2}{m_1v_1} = \dfrac{sin(\theta)}{ cos(\theta)}[/tex]
[tex](5).\: \: tan(\theta) = \dfrac{m_2v_2}{m_1v_1}[/tex]
putting in [tex]m_1 = 0.5kg[/tex], [tex]v_1 = 4m/s[/tex], [tex]m_2 = 4kg[/tex], and [tex]v_2 = 1m/s[/tex] we get:
[tex]tan(\theta) = \dfrac{(4kg)(1m/s)}{(0.5kg)(4m/s)}[/tex]
[tex]\boxed{\theta = 63.43^o}[/tex]
Thus, the final velocity [tex]v_f[/tex] we get from equation (3) is:
[tex]v_f=\dfrac{m_1v_1}{(m_1+m_2)cos(\theta)}[/tex]
[tex]v_f=\dfrac{(0.5kg)(4m/s)}{(4kg+0.5kg)cos(63.43^o)}[/tex]
[tex]\boxed{v_f = 0.99m/s}[/tex]
Thus, the velocity of the composite body is 0.99m/s 63.43° west of north.
A student is studying a type of wave. Which question will help the student determine if it is an electromagnetic wave?
A
Is it a seismic wave?
B
Is it a sound wave?
C
Is it a water wave?
D
Is it a light wave?
Answer:
A. seismic wave
Explanation:
Because a seismic wave is an elastic wave in the earth produced by an earthquake. And a electromagnetic wave is vibrations between an electric field and a magnetic field.
A student is studying a type of wave. Is it a light wave?, This question will help the student determine if it is an electromagnetic wave.
What is Visible light ?Visible light spectrum is nothing but the range of wavelength of radiation from 4000 angstrom to 7000 angstrom(Violet to Red). light is a energy packet. Every Photon having different wavelength travels with same velocity c (velocity of light). When we focus numbers of colors from visible spectrum to a point, that point appears as a white light. hence white light is composed of numbers of Colors in it.
When we pass white light through a prism, as white light enters in the prism all the colors having different wavelength travels with different velocity in the prism due to that there is separation of colors from the white light. Therefore we get different colors of white light in the prism this phenomenon is know as dispersion of light.
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How do you calculate the total resistance of a series circuit
The total resistance of a series circuit is obtained by summing all the individual resistance of the cricuit.
Total resistance of series circuitThe total resistance of a series circuit is obtained by summing all the individual resistance of the cricuit.
In series circuit, the current flowing in each circuit element is the same across the circuit.
V(t) = IR₁ + IR₂ + IR₃ + ----
V(t) = I(R₁ + R₂ + R₃)
Thus, the total resistance of a series circuit is obtained by summing all the individual resistance of the cricuit.
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Please help, I kinda suck at science
Answer:
They will push apart because they have the same charges
What do we call the substances that are formed as a result of substances reacting together?
Group of answer choices
A)none of the answers are correct
B)catalysts
C)products
D)reactants
1.) A device that uses
motion in an electric
field to produce an
electric current?
2.) A current consisting of charges that flow in only one direction?
Plz help me with these two questions give both answers and put the numbers giving 10 points and brainliest answer
Answer:
1. Generator
2. Direct current
Explanation:
1. The Generator is a device that uses energy of motion in a magnetic field to produce electric current. It converts mechanical energy into electrical energy.
2. The direct current or DC is the current in which charges flow in one direction. When there is continuous flow of electron tp the positive side from the negative side through a conducting material then the current is said to be Direct current.
What is the speed of light in a material if the index of refraction is 1.52? Use 3.00 x 10^8 m/s for the speed of light in a vacuum.
Answer:
Explanation:
Speed of light in a medium = speed of light in vacuum / refractive index
= 3 x 10⁸ / 1.52
= 1.97 x 10⁸ m /s .
Final answer:
The speed of light in a material with an index of refraction of 1.52, calculated from the given formula v = c/n, is approximately 1.97 x 10⁸ m/s.
Explanation:
The question asks for the speed of light in a material given its index of refraction is 1.52, using the speed of light in a vacuum as 3.00 x 10⁸ m/s. The index of refraction (n) is defined by the equation n = c/v, where c is the speed of light in vacuum, and v is the speed of light in the material. Hence, to find the speed of light in the material, we rearrange the formula to v = c/n.
Given c = 3.00 x 10⁸ m/s and n = 1.52, we calculate:
v = 3.00 x 10⁸ m/s / 1.52 = 1.97 x 10⁸ m/s
Therefore, the speed of light in a material with an index of refraction of 1.52 is approximately 1.97 x 10⁸ m/s.
read each scenario below. Then select the answer that best completes each sentence. The power from a car engine is blank The power of a bicycle because a car engine does the same amount of work in blank time.
Answer:
more than
less
Explanation:
The power of a car engine is far more than the power of a bicycle because a car engine does the same amount of work in less time.
What is Power?Energy transfer or conversion rate expressed in terms of power. The watt, which is equal to one joule per second in the SI Units, is the unit of power. Power may also be referred to as activity in earlier writings. A scalar concept is power.
Power is correlated with other factors; for instance, the gripping force on the tires and the vehicle's velocity are the product to determine the power required to move a ground vehicle. A motor's output power is calculated as the sum of the torque it produces and the angular speed of its output shaft.
As we know that the car and other vehicles are powered by machines but on the other side bicycles, carts, etc. are operated by human force, so the power of car engine is more than bicycle, and it does the same work in less time as compared to bicycle.
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This is the measurement from bottom to top of something. How tall something is.
Answer: Height
Explanation:
Height is the term that refers to the vertical distance from the bottom to the topmost part of any object. i.e
- a person height tells how tall he/she is,
- a building height tells the distance from ground level to the highest part.
Hence, height is measured in metres.
pp ez gg reee bee 15 17 19 21
Answer:
I have no clues what this means.....
Explanation:
I would be glad to help if you actually put a question.
Answer:
15 17 19 21 23 25 27 29 31 33 35 37 39 41
Explanation: