To completely describe the motion of an object, you need position, speed and direction of motion. Hence, option (D) is correct answer.
What is motion?In physics, motion is the alteration over time of a body's position or orientation. Translation is defined as movement along a line or a curve. Rotation is a motion that modifies a body's orientation. In all scenarios, the acceleration and directed speed of every point on the body are equal (time rate of change of velocity).
Every movement has a frame of reference to which it is relative. A body is not in motion when it is said to be at rest; rather, it is being characterised in relation to a frame of reference that is moving with the body. Hence, position, speed and direction of motion are needed to completely describe the motion of an object.
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What is meant by the statement "Motion is relativel"?
Answer:
when an object move from its place is called an mation
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Answer:
A
Explanation:
to simplify let's make it apart the denominator into three part
[tex] \frac{ {3xy}^{2} }{ {x}^{2} {y}^{2} } - \frac{ {8x}^{2} y}{ {x}^{2} {y}^{2} } + \frac{ {5x}^{2} {y}^{2} }{ {x}^{2} {y}^{2} } [/tex]
now let's simplify
[tex] \frac{3}{x} - \frac{8}{y} + 5[/tex]
so the answer is A
hope it helps
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which is the final event that occurs when a star is forming
Answer:
D.) Nuclear fusion begins under high pressure
Explanation:
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
Can someone answer this?
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
how can density be found
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
104470
Consider this group of rocks: granite, marble, and gneiss.
What property was used to group these rocks?
color
hardness
streak
O grain
Answer:
Grain
Explanation:
I just got it wrong :)
cardiorespiratory fitness improves the efficiency of the cardiovascular and the respiratory systems in delivering oxygen to the body
T
or
F
Answer:
true.
Explanation:
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
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]
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:
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
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
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.
Explain what cell theory is. Describe the history behind cell theory and the
scientists who were involved in forming the theory
Answer:
By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Explanation:
i got that from google hopefully it works
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:
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.
Which statement is always true about objects which exert gravitational force on each other? A. They are a very large size. B. They exist only in outer space. C. They are a speed. D.They are a mass.
Answer:
The answer is D. They are a mass.
Answer:
“they have mass” because if they don’t have mass they can’t exert force even if they have speed if they have no mass they can’t do anything or exert force
Explanation:
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
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A car is traveling at an average speed of 70 m/s. How many km would the car travel in 6.5 hrs. ?
Answer:
38,769.23 milesExplanation:
given:
A car is traveling at an average speed of 70 m/s.
find:
How many km would the car travel in 6.5 hrs. ?
solution:
distance = velocity over time
let velocity = 70 m/s
time = 6.5 hrs.
convert velocity 70 m/s into m/h for consistency of units.
70 mi. x 3600 sec. = 252,000 mi/hour
sec. 1 hr.
now plugin values into the formula d = v/t
d = 252,000 miles/hour
6.5 hours
d = 38,769.23 miles
therefore, the distance travelled in 6.5 hours with a speed of 70 m/s is 38,769.23 miles
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°
A comet is cruising through the Solar System at a speed of 50,000 kilometers per hour for 4.5 hours time. What is the total distance traveled by the comet during this time?
Answer:
The total distance traveled by the comet is 225000 [km]
Explanation:
In order to determine the travel distance we must use the following kinematics equation:
x = v*t
where:
x = distance traveled [km]
v = velocity = 50000 [km/h]
t = time = 4.5 [h]
x = 50000*4.5 = 225000 [km]
Because of the costs involved in maintaining high temperatures and pressure, nuclear method for generating electrical energy. is not yet a practical Which best completes the statement?
A.) fusion
B.) fission
C.) energy
D.) generators
Answer:
A. Fusion
Explanation:
Because of the costs involved in maintaining high temperatures and pressure, nuclear fusion method for generating electrical energy.
What is nuclear fusion?
Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles with the release of energy.
The energy realeased in the process is known as nuclear energy which can be converted into electricity.
The downside of this method of electricity generation is the equipment that will accomodate the high temperature process.
Thus, because of the costs involved in maintaining high temperatures and pressure, nuclear fusion method for generating electrical energy.
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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.
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.
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].
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
