Answer:
Waves transfer energy, not matter
Explanation:
Mercury has a mass of 3.3 e 23 kg and a radius of 2.44 e 6 m. Find Mercury's
gravitational field strength. Show your work (formula, rearrangement, work, answer,
unit, sig dig) (4)
12. Venus has a mass of 4.87 e 24 kg and a radius of 6.05 e 6 m. The gravitational field strength at the surface of Venus is what? m/s2
13. A small Styrofoam ball has a 2.26 nC charge (2.26 x 10°C). Find the electric field strength
5.00 cm (0.0500 m) from the ball. Show your work complete with formula, work, unit and
sig digs) (4)
Answer:
11.) g = 3.695 m/s^2
12.) g = 8.879 m/s^2
13.) E = 8127 N/C
Explanation:
11.) Given that the
Mercury mass M = 3.3 × 10^23kg
Radius r = 2.44 ×10^6 m
Gravitational constant G = 6.67408 × 10^-11 m3kg-1 s^-2
Gravitational field strength g can be calculated by using the formula below
g = GM/r^2
Substitutes all the parameters into the formula
g = (6.67408 × 10^-11 × 3.3 × 10^23)/(2.44×10^6)^2
g = 2.2×10^13/5.954×10^12
g = 3.695 m/s^2
12.) Given that the
Venus mass M = 4.87×10^24kg
Radius r = 6.05 × 10^6 m
Using the same formula for gravitational field strength g
g = GM/R2
Substitute all the parameters into the formula
g = (6.67408 × 10^-11 × 4.87×10^24)/(6.05×10^6)^2
g = 3.25×10^14/3.66×10^13
g = 8.879 m/s^2
13.) Given that the
Charge = 2.26 nC = 2.26×10^-9
Distance d = 0.05m
Electric field strength E can be calculated by using the formula below
E = Kq/d^2
Where
K = electrostatic constant 8.99 × 10^9 Nm2/C2
Substitutes all the parameters into the formula
E = (8.99 × 10^9 × 2.26×10^-9)/0.05^2
E = 20.3174/2.5×10^-3
E = 8126.96 N/C
A ball is dropped from a height of 23.5 meters. Assuming no air resistance, how many seconds will it take the ball to hit the
ground?
Answer:
About 2.19 seconds
Explanation:
[tex]d=v_ot+\dfrac{1}{2}at^2[/tex]
Since the ball is dropped from rest, there is no initial velocity, and you can write the following equation:
[tex]23.5=\dfrac{1}{2}(9.8)t^2 \\\\t^2\approx 4.79 \\\\t\approx 2.19s[/tex]
Hope this helps!
What is shown in the diagram?
an electromagnet
a turbine
a motor
a generator
Answer:
an electromagnet
Explanation:
Answer:
the answer is actually D.
A Generator
the guy above me is wrong
......pls brainliest
8. How does the direction of friction compare to an object's direction of motion?
Answer: The direction of the force of friction is such that it opposes the direction of motion that an object would move if there were no frictional force acting on the object.
The direction of motion and direction of friction have to be in opposite directions for a object to be in motion.
What is motion?Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.
Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.
Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic mechanics is based on modern kinematics.
Learn more about motion,here:
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Which of the following is an example of a medium for a visible light wave?
A. air
B. electrons
C. green light
D. blinds on a window
Answer:
C. green light
Explanation:
Answer:
i think D
Explanation:
hope it helps
When a fuse blows
Check all that apply
O A it's a sign that there might be something causing too much
current to flow in the circuit
O B it is best to replace it with a much larger fuse
o you should replace the fuse and check to see what might have
caused it to blow
O the circuit catches fire
Answer: A
it's a sign that there might be something causing too much
current to flow in the circuit
Explanation: When a fuse blows, one of the causes may be short circuit. Also, it's a sign that there might be something causing too much
current to flow in the circuit leading to overloading. That is, drawing to much of power that can cause the metal inside the fuse to melt.
Option A is the best answer.
Which best describes Earth’s magnetic field lines? The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are aligned with the geographic poles. The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are not aligned with the geographic poles. The field lines go out of Earth near the North Pole, enter Earth in the South Pole, and are aligned with the geographic poles. The field lines go out of Earth near the North Pole, enter Earth in the South Pole, and are not aligned with the geographic poles.
Answer:
b
Explanation:
did the quiz
Answer:
(B) The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are not aligned with the geographic poles.
Explanation:
Give a specific example of a vector quantity. Explain why this type of quantity would be used to describe this event.
Answer:
Vector Quantities Increase/Decrease in Temperature - The measurement of the medium's temperature is a scalar quantity; the measurement of the increase or decrease in the medium's temperature is a vector quantity. Velocity - The measurement of the rate at which an object changes position is a vector quantity.
Explanation:
Answer: velocity has a magnitude and a direction. This quantity is useful in every day lives in many ways. for example when you are driving in a car, its good to know the velocity in which the car is going.
Explanation: sorry its late
1 Point
What kind of reaction is most likely to stop when you cut off its supply of
oxygen?
O A. Decomposition
O B. Displacement
O C. Combustion
O D. Combination
SUBMIT
Answer: C
Combustion
Explanation:
Oxygen support combustion in a chemical reaction. Oxygen support burning.
In the absence of oxygen, combustion reaction can never take place. And when the supply of oxygen is being cut off, combustion reaction will automatically stop.
The correct option is C which is combustion
A negative slope on the velocity vs. time graph indicates that the object is not
accelerating
A. True
B. False
Answer: False, I think
Explanation:
Well it depends. Its hard to say without a function of the graph. Given a velocity graph, the first derivative is the acceleration.
Negative slope on a velocity graph means you are going in the negative direction. And over time, your velocity per unit of time is also decreasing. That means we are accelerating in the negative direction
PLEASE HELP QUICKLY!
What are the names of the components (each shown with a leader and a line) of a circuit shown in the diagram.
Name all 4.
Answer : a power supply of a circuit that was horizontal of the ladder where they controlled the circuit
What would a scientist most likely do to demonstrate the effects of a tsunami? (2 points) construct tsunami models make underwater plates move create actual underwater earthquakes take underwater photographs during a tsunami
Answer:
a - construct tsunami models
Explanation:
scientists cant effect on earthquakes directly, so its not 2 or 3
for 4 it wont help that much to study waves, so its better for them to make model of tsunami waves
All the terrestrial planets have..
A. liquid oceans
B. liquid helium
C. rocky surfaces
D. at least one moon
Matthew is looking at two different atoms. One has 8 protons and 10 neutrons. The other substance has 8 protons and 12 neutrons. Are these the same element? Why or why not?
Answer:
They are the same element.
Explanation:
Atom >>>>> Proton >>>> Neutron
A >>>>>>>> 8 >>>>>>>>> 10
B >>>>>>>> 8 >>>>>>>>> 12
From the table above we can see that both atoms have the same proton number.
Therefore, they are the same element because they have the same proton number which means that they have the same atomic number. The element in this case is existing as an isotope in that the atoms have the same proton number but different neutron number.
9. A weather satellite is launched from the ground and placed in orbit six times farther away from the earth's centre. The gravitational field experienced by the satellite in orbit is the field that it experienced on the ground?
a Six times
b. One sixth of
c. Thirty-six times
d. One thirty-sixth of
Answer: d
One thirty-sixth of
Explanation: Gravitational field or gravitational field strength obeys the inverse square law. The gravitational field is inversely proportional to the square of the earth distance. That is,
g = Gm/r^2
Where r = distance.
If weather satellite is placed in orbit six times farther away from the earth's centre, gravitational field will be one thirty-sixth of its initial value.
Therefore, the gravitational field experienced by the satellite in orbit is one thirty-sixth of the field that it experienced on the ground.
Describe the relationship between frequency and wavelength
Answer:
Frequency and wavelength are inversely related.
Explanation:
Frequency and wavelength have an inverse relationship because if one thing goes up another goes down. For example, if frequency goes up, the wavelength goes down and vice versa.
Answer:
The relationship between wavelength and frequency is that the frequency of a wave multiplied by its wavelength gives the speed of the wave.
Explanation:
Frequency and wavelength are related terms also, used to describe electromagnetic radiation or light. One simple equation is used to convert between them: frequency x wavelength = speed of light. λ v = c, when λ is wavelength, v is frequency, and c is the speed of light.
I know I'm really late but I hope this helps lol
Measurements show that the wavelength of
a sound wave in a certain material is 18.0 cm. The
frequency of the wave is 1900 Hz. What is the speed of
the sound wave?
Answer:a sound wave in a certain material is 18.0 cm. The
frequency of the wave is 1900 Hz. What is the speed of
Explanation:
If you drew magnetic field lines for this bar magnet, which statement would be true?
Arrows point away from south and toward north.
Arrows point toward both north and south.
Arrows point away from north and toward south.
Arrows point away from both north and south.
Answer:
the arrows would point away from the north and towards the south.
Explanation:
magnetic field lines form loops around the magnet and they start at the north pole and end at the north pole, meaning that the arrows on a diagram would point away from the north and towards south.
*PLS READ: so sorry I made a mistake in my answer, the loops formed start at the north and END AT THE SOUTH POLE!! I'm so sorry :(
Answer:
The answer is C.) Arrows point away from Norht and towards South.
Explanation:
I took the K12 quiz. The picture is linked at the bottom of my answer. Hope you have an awesome day! Good luck!
Which figure represents the electric field lines of two negative point charges?
Help
Answer:
The question is incomplete because the options are not given. We'll solve this question with the options.
There are two properties of negative charges which we have to consider to find the figure of its electrical field.
Firstly, for a negative charge, the electrical field lines are always directed radially outwards and they don't intersect.
Secondly, we know that similar charges repel each other, so there will be no electrical field present directly between these two negative charges. Electrical field line will be present between two charges only when there is a force of attraction.
Taking both of these facts into consideration, the electrical field line between two negatives is represented by the figure below.
Answer:
Figure C
Explanation:
Got it correct on Edmentum
A lens with f= 10.0 cm is held
45.0 cm from an object. What is
the image distance?
(Unit = cm)
it is not 12 cm.
Answer:
8.2 cm
Explanation:
1/f = 1/so + 1/si
1/10 = 1/45 + 1/si
1/si = 1/10 - 1/45
1/si = 9/90 - 2/90
1/si = 7/90
si = 90/7 = 12.86 cm.
since you said that the answer was not 12 them the lens must be concave with negative (minus) focal length
1/f = 1/so + 1/si
- 1/10 = 1/45 + 1/si
1/si = - 1/10 - 1/45
1/si = -9/90 - 2/90
1/si = -11/90
si = -90/11 = - 8.2 cm
- (read: minus or negative sign) indicates the image is in the same side of the object
hope its true and can help you
Answer:
1/f = 1/u + 1/v
f=10cm
u=45cm
v=? (Image distance)
1/v = 1/f - 1/u
1/v = 1/10 - 1/45
1/v = (9-2)÷ 90
1/v = 7/90
:. v = 90/7
v=12.86cm(image distance)
Different types of waves travel at different speeds. For example, sound waves travel more slowly than light waves. Have you ever been in a big empty room, or in a cave, and heard an echo? Echos happen because sound waves take time to travel to the wall and bounce back to your ears. But light is different. Light is much faster than sound. Light is the fastest moving thing in the universe. Because light waves and sound waves travel at different speeds, you can figure out how far you are from a storm by watching for lightning and listening for thunder. Lightning and thunder are actually the same thing! Thunder is just the sound that lightning makes. Because light is so quick, you see the lightning flash first. The sound travels more slowly, so you hear the thunder after. Thunder and lightning represent two kinds of waves: sound and light.
How do lightning and thunder illustrate the relationship between light and sound waves?
A Light moves faster than sound, so you hear thunder after you see lightning.
B Sound moves faster than light, so you see lightning after you hear thunder.
C Lightning and thunder are the same, so light and sound waves move together at the same time.
D Sound moves light, so when you hear thunder you know lightning will move toward you.
Answer:
A). Light moves faster than sound, so you hear thunder after you see lightning.
Explanation:
The lightning and thunder demonstrate that 'light travels faster than sound' which clearly portrays the relationship between the light and the soundwaves. When we see lightning in the sky before hearing the sound of thunder as the speed of light much higher than the speed of sound. Sound travels ~ 343 m/s or 1235 km/hr while light travels 300000 km/s. This difference in speed prevents us from considering lightning and thunder as the same thing. The 'sound is a pressure wave and therefore, takes time to travel and bounce back to our ears.' Thus, we happen to witness lightning first. Hence, option A is the correct answer.
For a current to flow continuously through a circuit, the circuit must be:
Answer:
An electrical current is an electrical charge flowing around a circuit. Carried by billions of tiny particles called electrons, the charge is already in the wires.
Explanation:
There are three basic conditions for the electric current flow is to be given below:-
The loop must be shuttered where current throws occur. There must be some possible distinctions in the chain. The medium in which current flows will be a conductor (but flow in the semiconductor at a higher temp. current).
An electron in a mercury atom drops from energy level f to energy level c by emitting a photon having an energy of
1. 8.20eV
2. 5.52eV
3. 2.84eV
4. 2.68eV
Answer:
The answer is 2.84 eV
Explanation:
An electron in a mercury atom drops from energy level f to energy level c by emitting a photon having an energy of 2.84eV.
What is mercury?Mercury is known to be a type of naturally-occurring chemical element that has been discovered in rock that is found in the earth's crust.
They can be found as a form of deposits of coal. On the periodic table, it symbol is "Hg" and it has about 80 atoms. It can be found as Elemental (metallic) mercury, Inorganic mercury compounds, etc.
Learn more about mercury atom from
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A car of mass 1000kg is moving at a speed of 20m/s.
It's brought to rest at a distance of 50m. Calculate the net force acting on the car.
Answer:
-4000 N
Explanation:
1. First let's look at what we know.
Mass: 1000 kg
Initial velocity: 20 m/s
Final velocity: 0 m/s
Displacement: 50 m
2. Let's try and apply a Kinematics equation here.
Looking at what information we have, I would say that this is the best equation:
v[tex]f^{2}[/tex]=v[tex]o^{2}[/tex] + 2aΔx
3. Plug in the numbers.
0 = 400 + 2(a)(50)
0 = 400 + 100a
-400 = 100a
a = -4 m/s^2
4. Use ∑F=ma
∑F = (1000)(-4)
∑F = -4000 N
How many suns do you think are in our galaxy? Explain your answer PLS HELP ASP BEST GETS BRAINLIEST
Answer: There is only one Sun in the galaxy … that is the thing that rises in the morning and sets at night. However, there is a use of “sun” to signify any old star … nobody knows exactly there might be trillions out there
Explanation:
Which of the following is the best description of the term resultant
displacement?
A. The scalar that joins all the points along the path.
B. The average of all the displacement vectors.
C. The total distance traveled.
O D. The shortest distance from the beginning point to the end point.
Answer:
D
Explanation:
Displacement refers to the shortest, or straight-line path from one point to another. It is a vector, thus A is incorrect. It is not the average, but rather the sum of all displacement vectors, so B is incorrect. It is not the distance traveled, as some paths have longer distances than others, while leading to the same destination, hence same displacement. (i.e. running around in circles yields positive distance traveled but zero displacement.)
Answer:
Explanation: D
Displacement is a vector. It has direction and it has magnitude. But we are asked for the resultant displacement. You have to use pythagorean theorem. This makes our answer always positive. That essentially means distance, since you did just do the distance formula.
A is wrong because that tells you perimeter
B is wrong because that tells you the midpoint
C is wrong because displacement and distance are two different things. We dont want the distance of the two vectors
D is correct, this perfectly explains the distance formula
If you divide a speed in miles per minute by 60, you get the same speed
expressed in miles per
Answer here
Can anyone help me with this question? ASAP
15 points
Explanation:
PRIMERO ENCUENTRAS LA COMPONENTE x
x = 5.9 m(cos62°) + 7.8 m(cos 29°) = 9.6 m
AHORA LA COMPONENTE y
y = 5.9 m(sen 62°) - 7.8 m(sen 29°) = 1.4 m
PARA ENCONTRAR DESPLAZAMIENTO:
R = [tex]\sqrt{(9.6 m)^{2} + (1.4 m)^{2}}[/tex] = 9.7 m
Question 1(Multiple Choice Worth 2 points)
(01.01 MC)
Once a scientist has made a hypothesis, what would they typically do next?
O Analysis
O Testing
O Research
O Sharing
Answer:
Testing
Explanation:
Scientific methods are the steps that scientists follow to find an answer to the questions and to find solutions to the problems. There are certain steps which are followed chronologically in the scientific method:
asking questionsmaking observationsforming a hypothesistesting the hypothesisanalyzing the resultsdrawing conclusioncommunicating the results1. A force that pushes forward on an object speeds the object up. A force that pushes backwards slows
the object down. What effect does a force that is perpendicular to the object's motion do?
Answer:
If pushing forward speeds it and pushing backward slows it down then force perpendicular to the object will keep it stationary and resist it's motion
Explanation:
Hope my efforts make impact in your life
