Answer:
The correct answer is the second option
Explanation:
The formula in question (for gravitational force) is provided below
F = G.m₁.m₂/r²
Where
F = force of gravity
G = gravity constant (6.674 × 10⁻¹¹ m.kg⁻¹.s⁻²)
m₁ and m₂ = are the masses of the objects
r² = distance between the centers of the two objects
From the above, it can be deduced that m₁ and m₂ are masses and hence can only be positive. Positives multiplied together only gives positive, thus the second option is correct.
what is measurement? why is it important to have regular supervision of the weights and measurement in the market?
Answer:
the comparison of known quantity to unknown quantity or standard guantity is called measurment
How many hydrogens are in 3 molecules of H20?
Answer:
1 atom of oxygen
2 atoms of hydrogen in each molecule
Each water molecule contains 3 atoms making the H2O formula
Where does the heat come from that creates the motion for continental drift?
A) The earth’s core
B) The earth’s mantle
C) The earth’s crust
D) The earth’s atmosphere
Answer:
The heat doesn't come from any of those the heat comes from the Sun
Explanation:
But the thing that holds the heat from the Sun is the Earth's atmosphere.
When he gets hot the carbon dioxide holds in the heat but when the when oxygen it meets the heat in the air it makes it become cooler
2. Using the same list of living things show how they could be classified into three groups.
Group 1 ________
Group 2 ________
Group 3 _________
Using the same list, show how they could be classified into four groups.
Group 1 ________
Group 2 ________
Group 3 _________
Group 4 __________
Please someone help as soon as possible.
and for this assignment group has have a different name while you are using these words in the picture.
oh almost forgot part 1 of this in the picture also.
Answer:
Also, you could do this for the groups:
Group 1- creatures with scales
Group 2- creatures with fur
Group 3- creatures with feathers
For 4 groups you could possible do:
Group 1- no legs
Group 2- 2 legs with wings
Group 3- 2 legs without wings
Group 4- 4 legs
Under what situation can an object experience multiple forces, but yet experience no acceleration
a
An object can experience multiple forces, so long as the net force is zero
b
An object can experience multiple forces, so long as they all act in the same direction
c
An object can experience multiple forces, so long as the mass is proportional
d
An object can experience multiple forces, so long as they are all the same type of force
Answer: A
Explanation:
As long as the net force of the multiple forces is zero there will be no acceleration.
Which is not a cell theory ?
A: All non - living things are made of cells
B: All cells come from pre - existing cells
C: Cells are the basic unit of structure and function of all living things
A spaceship is traveling through deep space towards a space station and needs to make a course correction to go around a nebula. The captain orders the ship to travel 1.7 ✕ 106 kilometers, then turn 70° and travel an additional 2.7 ✕ 106 kilometers to reach the space station. If the captain had not ordered a course correction, what would have been the magnitude and direction of the path of the spaceship if it has traveled through the nebula?
Answer:
Magnitude = 3.64 × [tex]10^6[/tex]
စ = 43.9°
Explanation:
given data
ship to travel = 1.7 × [tex]10^6[/tex] kilometers
turn = 70°
travel an additional = 2.7 × [tex]10^6[/tex] kilometers
solution
we will consider here
Px = 1.7 × [tex]10^6[/tex]
Py = 0
Qx =2.7 × [tex]10^6[/tex] cos(70)
Qy= 2.7 × [tex]10^6[/tex] sin(70)
so that
Hx = Px + Qx ............1
Hx = 2.62 × [tex]10^6[/tex]
and
Hy = Py + Qy ..........2
Hy = 2.53 × [tex]10^6[/tex]
so Magnitude = [tex]\sqrt{((2.62 \times 10^6 )^2+(2.53 \times 10^6)^2)}[/tex]
Magnitude = 3.64 ×
so direction will be
tan စ = Hy ÷ Hx ......................3
tan စ = [tex]\frac{2.53}{2.62}[/tex]
tan စ = 0.9656
စ = 43.9°
1. What occurs when there is a change in position of an object with respect to a reference starting point?
A. Directions
B. Motion
C. Position
D. Displacement
Answer:
Motion
Explanation: Enjoy! :)
If you added sand to your coffee, what kind of mixture would your coffee now
be?
Answer:
A heterogenous mixture.
Explanation:
If you added sand to your coffee, the kind of mixture your coffee would now
be is a heterogenous mixture.
A heterogenous mixture can be defined as any mixture which has a different or non-uniform composition and properties throughout any given sample of the mixture. This ultimately implies that, the constituents of a heterogenous mixture always remain separate in the sample and as such comprises of two or more phases.
Hence, a mixture of sand and coffee is simply a heterogenous mixture and can easily be separated into their various components.
If velocity of a particle is given by v=10+2t² m/s, the average acceleration between 2 sec and 5 sec is?
Answer:
14 m/s^2
Explanation:
Use the formula to get the velocities at 2, and 5 seconds.
Then use the average acceleration formula.
A swimming pool has the shape of a right circular cylinder with radius 21 feet and height 10 feet. Suppose that the pool is full of water weighing 62.5 pounds per cubic foot. The work W required to pump all the water to the top of the pool is given by W = 4329507.37572 Correct: Your answer is correct. foot-pounds. The work W required to pump all the water to a platform 2 feet above the top of the pool is given by W = foot-pounds.
Answer:
The water required to pump all the water to a platform 2 feet above the top of the pool is is 6061310.32 foot-pound.
Explanation:
Given that,
Radius = 21 feet
Height = 10 feet
Weighing = 62.5 pounds/cubic
Work = 4329507.37572
Height = 2 feet
Let's look at a horizontal slice of water at a height of h from bottom of pool
We need to calculate the area of slice
Using formula of area
[tex]A=\pi r^2[/tex]
Put the value into the formula
[tex]A=\pi\times21^2[/tex]
[tex]A=441\pi\ feet^2[/tex]
Thickness of slice [tex]t=\Delta h\ ft[/tex]
The volume is,
[tex]V=(441\pi\times\Delta h)\ ft^3[/tex]
We need to calculate the force
Using formula of force
[tex]F=W\times V[/tex]
Where, W = water weight
V = volume
Put the value into the formula
[tex]F=62.5\times(441\pi\times\Delta h)[/tex]
[tex]F=27562.5\pi\times\Delta h\ lbs[/tex]
We need to calculate the work done
Using formula of work done
[tex]W=F\times d[/tex]
Put the value into the formula
[tex]W=27562.5\pi\times\Delta h\times(10-h)\ ft\ lbs[/tex]
We do this by integrating from h = 0 to h = 10
We need to find the total work,
Using formula of work done
[tex]W=\int_{0}^{h}{W}[/tex]
Put the value into the formula
[tex]W=\int_{0}^{10}{27562.5\pi\\times(10-h)}dh[/tex]
[tex]W=27562.5\pi(10h-\dfrac{h^2}{2})_{0}^{10}[/tex]
[tex]W=27562.5\pi(10\times10-\dfrac{100}{2}-0)[/tex]
[tex]W=4329507.37572[/tex]
To pump 2 feet above platform, then each slice has to be lifted an extra 2 feet,
So, the total distance to lift slice is (12-h) instead of of 10-h
We need to calculate the water required to pump all the water to a platform 2 feet above the top of the pool
Using formula of work done
[tex]W=\int_{0}^{h}{W}[/tex]
Put the value into the formula
[tex]W=\int_{0}^{10}{27562.5\pi\\times(12-h)}dh[/tex]
[tex]W=27562.5\pi(12h-\dfrac{h^2}{2})_{0}^{10}[/tex]
[tex]W=27562.5\pi(12\times10-\dfrac{100}{2}-0)[/tex]
[tex]W=1929375\pi[/tex]
[tex]W=6061310.32\ foot- pound[/tex]
Hence, The water required to pump all the water to a platform 2 feet above the top of the pool is is 6061310.32 foot-pound.
1. In which scenario is the force
of gravity the strongest
between the two objects?
Explain.
2. If the objects in scenario B
represent planets, on which
planet would you weigh less?
Use the terms, mass, weight,
and gravity in your answer.
Answer:
B
Explanation:
A would mean that the two heavier objects would slowly join together.
C would mean that the two objects may not be close enough together.
B the object is at a decent distance and the smaller onject because it contains a smaller mass and therfore would be lighter, would basically fly at the larger object.
I hope that makes sense. My brain and explanations are a bit different lol.
Which statement can be supported by using a position-time graph?
A negative slope results when an individual is moving away from the origin.
A horizontal line on the graph means the individual is moving at a non-zero velocity.
A positive slope results when an individual is moving away from the origin.
The speed of an individual cannot be determined from this type of graph.
Column A should be “Time,” and Column B should be “Position.”
Column A should be “Position,” and Column B should be “Time.”
Column A should be “Velocity,” and Column B should be “Speed.”
Column A should be “Speed,” and Column B should be “Velocity.”
Answer:
Explanation:
Think about the equation for velocity. Its the change in position over the change in time. And now think about the formula for slope, its the change in y over the change in x. Now, if you have a position vs time graph, the slope is position over time, the direct formula for velocity. Therefore, the slope of a position vs time graph gives the velocity in that interval. You could take the derivative at that point and get the instantaneous velocity.
In the first argument, the only way to get a negative slope is if youre moving to the left of your initial position as you pass through time. So the claim isnt necessarily true. When you move away from the origin, that simply means youre moving through time.
In the second argument, a horizontal slope means the value is 0. That means there is a value of 0 for your velocity, aka standing still.
In the third argument, a positive slope means youre moving to the right of your initial position as you go through time.
The fourth one is incorrect. Speed is the magnitude of velocity, and the slope can be determined an any point besides vertical slopes, which would require time to literally stop.
I dont understand the very last part of what you posted, so try to make a decision based on what I just explained to you
Answer:
The answer should be
"A positive slope results when an individual is moving away from the origin."
Also known as C on ed 2020
Explanation:
I hope you get this right even tho I may be late, but to all the others who have this question. Stay safe!!!!
why is velocity called vector quantity while speed is a scalar quantity
Answer:
velocity is the rate of change of distance moved with a time in a specific direction. While speed is the rate if distance with time in no specific direction
Distance between Ranjan and Gomes house is 9km. Ranjan has to attend Gomes birthday party at 7 o'clock. He started from his home at 6 o'clock on his bicycle and covered a distance of 6km in 40 minutes. At that point he met David and he spoke to him for 5minutes and reached Gomes birthday party at 7 o'clock. At what speed did he cover the second part of the journey? Calculate his average speed for the entire journey.Required to answer.Single line text.
Answer:
Kindly check explanation
Explanation:
Given the following :
Distance between Ranjan and Gomez house = 9km
Start time = 6'o clock
Time he arrived at Gomes house = 7'o clock
Time used for chatting during this period = 5 minutes
Distance covered in 40minutes = 6km
Time spend for second part of the journey = (60 - (40 + 5))minutes = 15 minutes = 15/60 = 0.25 hoir
Distance covered during second part of journey = 9 - 6 = 3 km
Speed = distance / time
Speed = 3km / 0.25 hr = 12km/hr
Average speed for entire journey :
First part :
Speed = distance / time
Time = 40 minutes = (40/60) = 0.667 hour
Speed = 6km / 0.667 hour = 9km / hr
Average speed :
(First part + second part) / 2
(9km/hr + 12km/hr) / 2 = 21km/hr / 2 = 10.5 km/hr
= 10.5km/hr
What is the acceleration of a racing car if it’s speed is increased uniformly form 44m/s to 66 m/s over an 11 sec. period.
Answer:
[tex]a=2\ m/s^2[/tex]
Explanation:
Given that,
Initial velocity, u = 44 m/s
Final velocity, v = 66 m/s
Time, t = 11 s
Acceleration = rate of change of velocity
[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{66-44}{11}\\\\a=2\ m/s^2[/tex]
So, the acceleration of the car is [tex]2\ m/s^2[/tex].
All circular motions are usually periodic but all periodic motions are not circular why
All periodic motions are not circular bcox they aren't similar to each other as u know the motion repeats the periodic table and also repeats itself of the tym perform the motion of the periodic...
Answer:
t is usually seen that all circular motions are usually periodic
Explanation:
but all periodic motions are not circular
this can be proved by an example for example when vehicles runs in uniform speed of motion then its speed is called periodic motion
where is his speed might not be called circular motion
if my answer is correct please mark my answer as brainliest
what is involved in the 2nd step of the Scientific method??helpppppp asappp
Answer:
The second step of the scientific method is the question being researched, the hypothesis. ... This hypothesis includes the explanation for the observation, it can be tested, and new conclusions may be reached. The third step of the scientific method is the experiment.
Explanation:
Answer:
The second step of the scientific method is the question being researched, the hypothesis. This hypothesis includes the explanation for the observation, it can be tested, and new conclusions may be reached. The third step of the scientific method is the experiment.
Explanation:
The velocity ratio of a pulley system is 4. What does it mean?
Please answer
Answer:
The force ratio of a machine is 5 and it velocity ratio is 5 means that the load moved is five times the effort applied and the distance moved by the effort is five times the distance moved by the load at the same time interval.
Explanation:
can u show me how u get the answer
Explanation:
[tex]p1 \times v1 = p2 \times v2 [/tex]
[tex]p1 = initial \: pressure \\ v1 = initial \: volume \\ p2 = final \: pressure \\ v2 = final \: volume[/tex]
You're looking for p2. So, divide both sides by v2...
[tex] \frac{p1 \times v1}{v2} = p2[/tex]
volume of a cylinder is
[tex]h \times \pi \: \times {r}^{2} [/tex]
let's assume r = 1
[tex] \frac{p1 \times (20cm \times \pi)}{(60cm \times \pi)} = p2[/tex]
the Pi's cancel out, the 20/60 can be reduced to 1/3.
So you end up with
[tex]p1 \times \frac{1}{3} = p2[/tex]
or as the book shows....
[tex] \frac{1}{3} p[/tex]
If you get a ticket for speeding, it is based on your average speed or instantaneous speed? Explain
Answer:
Instantaneous speed
Explanation:
Usually the speed measuring guns are used to measure the speed at a certain instant, so the measured speed is instantaneous.
The average speed is determined by the expression final distance minus initial distance divided by time
[tex]v_{aver} =\frac{x_{f}- x_{i}}{t}[/tex]
The instantaneous speed is determined in the same way as the average, but with the exception that the travel displacements are shorter (very close one each other).
WILL MARK BRAINLIEST!!!!
Light reflects off many objects. Which model of light behavior best helps explain this effect?
Particle model
Wave model
Magnetic model
Electric model
Answer:
Wave model
Explanation:
Answer:
The answer would be a wave model
Explanation:
which is the final event that occurs when a star is forming
Answer:
D.) Nuclear fusion begins under high pressure
Explanation:
material speed of light
space 3 x 108 m/s
water 2.25 x 108 m/s
glass 2 x 108 m/s
air 3 x 108 m/s
Light moves from air into a new material. The greatest refraction would occur when light passes through which material?
A. air
B. water
O c. glass
D. It would refract the same amount in each material.
Answer:
c glass
Explanation:
beacause glass is transparent and it would be easier to for refraction
GIVING BRAINLIEST!! HELP ASAP!! (use the photo for help)
a. Energy is unknown
b. Energy is destroyed
c. Energy does not freely move
d. Energy freely moves
what is someone who leaves there country to settle in another?
Answer:
an immigrant
Explanation:
Answer:
it is an immigrant
Explanation:
three importance of SI system
Answer:
Firstly they are, by design, easy to use in most scientific and engineering calculations; you only ever have to consider multiples of 10. If I’m given a measurement of 3.4 kilometres, I can instantly see that it’s 3′400 metres, or 0.0034 Megametres, or 3′400′000 millimetres. It’s not even necessary to use arithmetic, I just have to remember the definitions of the prefixes (“kilo” is a thousand, “megametre” is a million, “milli” is a thousandth) and shift the decimal point across to the left or the right. This is especially useful when we’re considering areas, speeds, energies, or other things that have multiple units; for instance,
1 metre^2 = (1000millimetre)^2 = 1000000 mm^2.
If we were to do an equivalent conversion in Imperial, we would have
1 mile^2 = (1760 yards)^2
and we immediately have to figure out what the square of 1760 is! However, the fact that SI is based on multiples of 10 has the downside that we can’t consider division by 3, 4, 8, or 12 very easily.
Secondly they are (mostly) defined in terms of things that are (or, that we believe to be) fundamental constants. The second is defined by a certain kind of radiation that comes from a caesium atom. The metre is defined in terms of the second and the speed of light. The kelvin is defined in terms of the triple point of water. The mole is the number of atoms in 12 grams of carbon-12. The candela is defined in terms of the light intensity you get from a very specific light source. The ampere is defined using the Lorentz force between two wires. The only exception is the kilogram, which is still defined by the mass of a very specific lump of metal in a vault in France (we’re still working on a good definition for that one).
Thirdly, most of the Imperial and US customary units are defined in terms of SI. Even if you’re not personally using SI, you are probably using equipment that was designed using SI.
Which statement is a scientific theory?
A. Most cells are so small that they can be observed only through a
microscope.
B. The interactions between cells can be predicted with
mathematical equations.
O C. Cells are the fundamental units of all living organisms.
O D. The various functions of different types of cells can be determined
by experiments.
Answer:
A.
Explanation:
Answer: C : Cells are the fundamental units of all living organisms.
Explanation: took the quiz
E-mail is usually a poor choice for the distribution of sensitive electronic files because
A paper copies seem more official than e-mail
B. not all computers can read e-mails correctly
C. it is easy to send e-mail to the wrong person
D. e-mail is saved on the server that transfers it
Answer:
it's D
Explanation:
its on edge
It takes a slug 20 minutes to travel from the grass to the trash can , a trip of 15 meters. How far could the slug travel in 60 minutes (help me please)
Answer:
45 meters
Explanation:
20 min = 15 meters
So if 20 x 3 = 60
you have to do 3 x 15 !
- which equals to 45 <3
- mark me brainlest pls .
