Answer:
1. 8437500 N
2. The force between the two charges is attractive.
Explanation:
1. Determination of the force between the two charges.
Charge 1 (q₁) = –2.0 C
Charge 2 (q₂) = 3.0 C
Distance apart (r) = 80 m
Electrical constant (K) = 9×10⁹ Nm²/C²
Force (F) =?
F = Kq₁q₂ / r²
F = 9×10⁹ × 2 × 3 / 80²
F = 5.4×10¹⁰ / 6400
F = 8437500 N
Thus, the force of attraction between the two charges is 8437500 N
2. From the question given, the charges are:
Charge 1 (q₁) = –2.0 C
Charge 2 (q₂) = 3.0 C
We understood that like charges repels while unlike charges attract. Since the two charges (i.e –2 C and 3 C) has opposite signs, it means they will attract each other.
Thus the force between them is attractive.
According to the Law of Reflection, the angle of incidence
the angle of reflection
A. equilis
B. is less than
C. is opposite from
D. is greater than
Answer:
A
Explanation:
this is because the law of reflection states that the angle of incidence equals to the angle of the reflection.
hope this helps, if not please report it
someone else can try it
what is fuse short answer
Answer:
Its a fuse.
Explanation:
3. When water droplets are pushed through sand, gravel and carbon filters is the
water clean and ready to drink? Why or why not?
Answer:
i think yes, because the sand together with the filters catches all the impurities of the water that will pass through them. (btw sorry for my English, this is translated from my language in translator, so don't mind my English pls)
Which is a vector quantity?
speed
time
acceleration
distance
Answer:
the quantity which has both magnitude and direction is called vector quantity
Water has a relatively low specific heat.
True
False
Answer:
The answer is False
Explanation:
Hope this helps :)
How would you describe the movement of a transverse wave?
Up and down
Back and forth
In zigzags
Linear
Answer:
Up AND Down
Explanation:
a transverse wave goes up and Down
1. What have modern observations shown sunspots to be?
Answer:
[tex].[/tex]
Explanation:
sunspots are areas that appear dark on the sun's surface.They appear dark because they are colder that parts of the sun's surface. However, the temperature of a sunspot is still very high. This can cause a sudden burst of energy space. If a solar flare is very intense, the radiation it releases can interfere with our radio communication here on earth
Which of these is an example of interference? A. two lasers pointing away from each other В. two different light waves colliding and adding together C. a light wave bending around the corner of an obstacle D. a light wave bouncing off of a flat surface
Answer:
I believe the answer is B. Although it might be C.
Explanation:
I hope this helps!
A 200 gram mass is placed on the meter stick 20 cm from the pivot point (the fulcrum). An unknown mass is positioned 8 cm from the fulcrum to balance the system. What is the mass of this unknown object?
Answer:
80 grams
Explanation:
multiplying 8 by 2.5 to get 20
so then deviding 200 by that 2.5 will get you 80 grams
This question involves the concepts of equlibrium and moment.
The mass of unknown object should be "500 g".
EQUILIBRIUMIn order to balance the meter stick equilibrium should be achieved. For equilibrium the moment due to each mass must be the same.
[tex]F_1d_1=F_2d_2\\m_1gd_1=m_2gd_2\\m_1d_1=m_2d_2[/tex]
where,
m₁ = mass of known object = 200 gm₂ = mass of unknown object = ?d₁ = distance from fulcrum of known object = 20 cmd₂ = distance from fulcrum of unknown object = 8 cmTherefore,
[tex](200\ g)(20\ cm)=(m_2)(8\ cm)\\\\m_2=\frac{(200\ g)(20\ cm)}{8\ cm}[/tex]
m₂ = 500 g
Learn more about moment here:
https://brainly.com/question/6278006
Not allowed to use kinematics
Answer:
A. 131.9 s
B. 0.13 m/s
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 490 Kg
Height (h) = 17 m
Power (P) = 0.83 hp
Time (t) =?
Velocity (v) =.?
Next, we shall convert 0.83 hp to Watts. This can be obtained as follow:
1 hp = 745.7 Watts
Therefore,
0.83 hp = 0.83 hp × 745.7 Watts / 1 hp
0.83 hp = 618.931 Watts
Thus, 0.83 hp is equivalent to 618.931 Watts.
A. Determination of the time.
Mass (m) = 490 Kg
Height (h) = 17 m
Power (P) = 618.931 Watts
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
Power = Energy / time
P = mgh / t
618.931 = 490 × 9.8 × 17 / t
618.931 = 81634 / t
Cross multiply
618.931 × t = 81634
Divide both side by 618.931
t = 81634 / 618.931
t = 131.9 s
Therefore, it will take 131.9 s to lift the beam.
B. Determination of the constant velocity.
We'll begin by calculating the force. This can be obtained as follow:
Mass (m) = 490 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Force (F) =?
Force = mass × acceleration
Force = 490 × 9.8
Force = 4802 N
Finally, we shall determine the constant velocity as follow:
Force (F) = 4802 N
Power (P) = 618.931 Watts
Velocity (v) =?
P = F × v
618.931 = 4802 × v
Divide both side by 4802
v = 618.931 / 4802
v = 0.13 m/s
Thus, the constant speed at which the beam moves upward is 0.13 m/s
HELP! FOR A TEST!
The slope of a velocity versus time graph is the object's:
acceleration
displacement
position
velocity
Answer:
On a velocity vs time graph the slope of the line represents the acceleration of the object. With a slope of zero, the object is moving at a constant velocity in the positive (+) direction during this five minute interval. ... Displacement and distance can both be determine on a velocity vs.Answer:
Acceleration
Explanation:
plato
An empty can of soda is yeeted (thrown) into a crowd. Then, a full can of soda is yeeted into a crowd. Throwing the full can took more force to than the empty one to reach the same acceleration. Which law does this show?
Answer:
Newton's third law of motion.
Explanation:
We are told the force needed to throw the full soda can was more than that needed to throw the empty can.
Now, the weight of the full soda can will be more than that of the empty can. Therefore, the full can will demand more force than that of the empty can due to Newton's third law of motion which states that to every action, there is an equal and opposite reaction.
How are electric potential difference and electric potential energy related?
Answer: NOT B) Electric potential energy is the charge divided by the electric potential difference.
Explanation:
just missed it on edg
Answer: Choice C
Explanation:
a ball kicked with a velocity of 8m/s at an angle of 30 degree to horizontal. calculate the time of flight of the ball. (g=10ms^2)
Answer:
Approximately [tex]0.8\; \rm s[/tex] (assuming that air resistance is negligible.)
Explanation:
Let [tex]v_0[/tex] denote the initial velocity of this ball. Let [tex]\theta[/tex] denote the angle of elevation of that velocity.
The initial velocity of this ball could be decomposed into two parts:
Initial vertical velocity: [tex]v_0(\text{vertical}) = v_0 \cdot \sin(\theta)[/tex].Initial horizontal velocity: [tex]v_0(\text{vertical}) = v_0 \cdot \cos(\theta)[/tex].If air resistance on this ball is negligible, [tex]v_0(\text{vertical})[/tex] alone would be sufficient for finding the time of flight of this ball.
Calculate [tex]v_0(\text{vertical})[/tex] given that [tex]v_0 = 8 \; \rm m \cdot s^{-1}[/tex] and [tex]\theta = 30^\circ[/tex]:
[tex]\begin{aligned}& v_0(\text{vertical}) \\ &= v_0 \cdot \sin(\theta) \\ &= \left(8 \; \rm m \cdot s^{-1} \right) \cdot \sin\left(30^{\circ}\right) \\ &= 4\;\rm m \cdot s^{-1} \end{aligned}[/tex].
Assume that air resistance on this ball is zero. Right before the ball hits the ground, the vertical velocity of this ball would be exactly the opposite of the value when the ball was launched.
Since [tex]v_0(\text{vertical}) = 4\; \rm m \cdot s^{-1}[/tex], the vertical velocity of this ball right before landing would be [tex]v_1(\text{vertical}) = -4\; \rm m \cdot s^{-1}[/tex].
Calculate the change to the vertical velocity of this ball:
[tex]\begin{aligned}& \Delta v(\text{vertical}) \\ & = v_1(\text{vertical}) - v_0(\text{vertical}) \\ &= -8\; \rm m \cdot s^{-1}\end{aligned}[/tex].
In other words, the vertical velocity of this ball should have change by [tex]8\; \rm m \cdot s^{-1}[/tex] during the entire flight (from the launch to the landing.)
The question states that the gravitational field strength on this ball is [tex]g = 10\; \rm m \cdot s^{-2}[/tex]. In other words, the (vertical) downward gravitational pull on this ball could change the vertical velocity of the ball by [tex]10\; \rm m\cdot s^{-1}[/tex] each second. What fraction of a second would it take to change the vertical velocity of this ball by [tex]8\; \rm m \cdot s^{-1}[/tex]?
[tex]\begin{aligned}t &= \frac{\Delta v(\text{initial})}{g} \\ &= \frac{8\; \rm m \cdot s^{-1}}{10\; \rm m \cdot s^{-2}} = 0.8\; \rm s\end{aligned}[/tex].
In other words, it would take [tex]0.8\; \rm s[/tex] to change the velocity of this ball from the initial velocity at launch to the final velocity at landing. Therefore, the time of the flight of this ball would be [tex]0.8\; \rm s\![/tex].
What is a group of two or more atoms that are held together by chemical bonds?
A.) formula
B.) molecule
C.) mixture
D.) element
Answer:
b
Explanation:
Explain why pulleys are in the lever family.
Answer:
The leverage or mechanical advantage of pulleys is less obvious, but you can "gang" multiple pulleys together into two sets (blocks) and run the ropes back and forth between the two sets to increase the number of lengths of rope running between them. One end of the rope is connected (fixed) to one of the blocks, and you get to pull on the other end after it is passed back and forth between the blocks of pulleys. This is sometimes called a block and tackle arrangement. With a hook on each side of the block set, you can move a heavy load much like levers do, by multiplying the force. You have to pull more rope just like you have to move a lever more on one side of the fulcrum as compared to the other. When you get all the rope pulled out that you can, you can not move the load anymore because you have become "two-blocked" which means the two blocks are together. Credits to: Moin Khan
a car travelling initially at a speed of 30 m/s slows down at the rate of -2 m/s² for a distance of 60 meters. the car's velocity after covering this distance is __ m/s?
Answer:
answer
Explanation:
this is the answer with annotation and law
HELP PLZ!!! what is the answer to number 8?
how to draw angle of 135 degree
Start Point: an unlit match. End Point: a lit match.
Answer:
Ok
Explanation:
What is championship game of baseball called? The World Series The Super Bowl The World Cup
Answer:
The World Series
Explanation:
The Super Bowl is the championship American Football game, and the World Cup is the Soccer/Football game.
American Football and Football are different things. The first is what Americans call football, while the other is what Americans call soccer. It is confusing.
facts about conolizing into mars?
Mars is the focus of much scientific study about possible human colonization. Its surface conditions and the presence of water on Mars make it arguably the most hospitable of the planets in the Solar System, other than Earth. Mars requires less energy per unit mass (delta-v) to reach from Earth than any planet except Venus.
Permanent human habitation on a planetary body other than the Earth is one of science fiction's most prevalent themes. As technology has advanced, and concerns about the future of humanity on Earth have increased, the argument that space colonization is an achievable and worthwhile goal has gained momentum. Other reasons for colonizing space include economic interests, long-term scientific research best carried out by humans as opposed to robotic probes, and sheer curiosity.
One of Elon Musk's stated goals through his company SpaceX is to make such colonization possible by providing transport, and to "help humanity establish a permanent, self-sustaining colony on Mars within the next 50 to 100 years".
Many organizations support the colonization of Mars. They have also given different reasons and ways humans can live on Mars. One of the oldest organizations is the Mars Society. They promote a NASA program that supports human colonies on Mars. The Mars Society have set up Mars analog research stations in Canada and the United States. All other organizations include MarsDrive, who wants to help fund settlements on Mars, and Mars to Stay. Mars to Stay advocates settlements on Mars. In June 2012, Mars One released a statement that they believe could help start a colony on Mars by 2023.
What layer of the atmosphere is hot but does not have enough gas molecules to transfer heat to you (i.e., you would not feel the heat of the layer)?
Group of answer choices
Thermosphere
Tropopause
Stratopause
Answer:
thermosphere...........
in a well water is filled up to the height of 6 meters.calculate the pressure given by the water at the bottom of the well
Answer:
The pressure given by the water at the bottom is 58,800 Pa
Explanation:
Pressure Exerted by a Column of Liquid
The pressure P exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation:
P = ρgh
Where ρ is the density of the liquid, g is the acceleration of gravity g=9.8m/s^2, and h is the height of the column of liquid.
The height of water in a well is h=6 m. The density of water is a known quantity:
[tex]\rho = 1,000\ kg/m^3[/tex]
Calculating P:
P = 1,000*9.8*6
P = 58,800 Pa
The pressure given by the water at the bottom is 58,800 Pa
What is the current in a copper wire if 650C of charge passes through it in 6 minutes
1. 180A
2. 18A
3. 1.8A
4. 108A
Answer:
3. 1.8A
Explanation:
Given the following data;
Quantity of charge, Q = 650C
Time = 6 minutes to seconds = 6 * 60 = 360 seconds.
To find the current l;
Quantity of charge = current * time
Substituting into the equation, we have;
650 = current * 360
Current = 650/360
Current = 1.8 Amperes
what's beyond the universe
Answer:
Nobody knows...
Explanation:
_____ is the sum of all potential and kinetic energy.
Group of answer choices
Law of Conservation of Energy
Gravitational Potential Energy
Stored energy
Mechanical Energy
Answer:
Mechanical EnergyExplanation:
Mechanical energy is the sum of all potential energy and kinetic energy .
I HOPE IT HELPS ❤❤Sound waves are:
O Mechanical Waves
O Electromagnetic Waves
AND
Sound waves are, longitudinal waves or transverse waves
Answer:
Mechanical waves
Longitudinal waves
Explanation:
Sound waves are mechanical waves because they require a medium to transport their energy from one place to another.
Sound waves are longitudinal waves because the vibration of sound is transported parallel to the direction that the sound waves move.
If Sophie climbs a ladder 3.4 m tall, and Sophie has a mass of 48 kg, how much G.P.E. has she gained?
Answer:
Sophie gained 1,599.36 J of GPE
Explanation:
Gravitational Potential Energy (GPE)
Gravitational potential energy is the energy stored in an object because of its vertical position or height in a gravitational field.
It can be calculated with the equation:
U=mgh
Where:
m = mass of the object
h = height with respect to a fixed reference
g = acceleration of gravity ([tex]9.8 m/s^2[/tex])
Sophie has a mass of m=48 Kg and climbs a ladder that takes her to a height of h=3.4 m.
Calculate the GPE she gained:
U = 48 * 9.8 * 3.4
U = 1,599.36 J
Sophie gained 1,599.36 J of GPE
GIVING BRAINLIEST LOOK AT THE DIAGRAM AND AWNSER THE QUESTION
Which statement is best supported by the diagram?
Kinetic energy becomes potential energy between points R and S.
Maximum potential energy is at point P.
Maximum potential energy is at point R.
Potential energy becomes kinetic energy between points P and Q.
Answer: Maximum potential energy is at point R. (C)
Explanation: At point R, the ball lost all of its kinetic energy since it stopped moving upwards. It then gained potential energy due to gravity, and started moving downwards.