Least common shape for a galaxy is
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Answer:
cluster
Explanation:
Related Questions
Superposition of two wave crests produces
What is its characteristic wavelength? [Hint: Recall that the kinetic energy of a moving object is E=12mv2, where m is the mass of the object and v is the speed of the object.]
A skier has an acceleration of 2.5 m/s2. How long does it take her to come to a complete stop from a speed of 18 m/s?
A car's velocity changes from 32m/s to 96m/s in an 8.0-s period. what is its acceleration?
C. a luôn cùng dấu với v. D. a luôn ngược dấu với v.
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Answer:
B.
Explanation:
Answers
take 56.9/1.137 = 50.043 mi/hr
take 189/211 = 0.896
24.8/2 = 12.4 m
12.4/82.3 = 0.15s
a lot of points, and your plea for help sounds so desperate, that I think
I ought to jump in here and relieve some of your pain.
These aren't difficult problems. The bummer is that whoever wrote them
got so interested in his dinosaur stories that he kind of hid the actual Math
and Physics under all kinds of stuff that doesn't matter.
1). Speed = (distance covered) / (time to cover the distance)
= (56.9 miles) / (68.2 minutes)
= (56.9 / 68.2) miles/minute
= 0.834 mile per minute.
BUT ... the question wants to know the speed in 'mph' ... miles per hour.
Well ... there are 60 minutes in an hour. If 0.834 mile in covered in 1 minute,
then 60 times as much would be covered in 1 hour.
(0.834 mile/minute) x (60 minute/hour) = 50.06 mile/hour
Rounded to no decimal places = 50 mph
2). Use the same formula:
Speed = (distance covered) / (time to cover the distance)
= (189 meters) / (211 seconds)
= (189 / 211) meters/seconds
= 0.8957 meters/second
Round to 3 decimal places: 0.896 m/s
3). The attacker jumped from 24.8 meters away.
He already covered half of the distance.
How far away is he now ? 1/2 of 24.8 m = 12.4 m .
He still has 12.4 meters left to go.
He's moving at 82.3 meters per second.
When will he arrive here ?
Time = (distance) / (speed)
= (12.4 meters) / (82.3 m/s)
= (12.4 / 82.3) seconds
= 0.1506 second
Two decimal places: 0.15 second
4). Distance = (speed) x (time)
= ( 237 km/hr) x (16.8 seconds) .
Do you see the problem here ? We have the distance covered in an hour,
but we need to know how much distance is covered in only 16.8 seconds.
We really need to work out the speed in (meters per second).
OK. 237 km = 237,000 meters, so the speed is 237,000 meters/hour.
1 hour is 3,600 seconds.
So the speed is only one 3600th of 237,000 meters in 1 second.
(237,000 meters/hour) x (1 hour / 3600 seconds) = 65.8333 m/s
Distance = (speed) x (time)
= (65.8333 meter/second) x (16.8 seconds)
= (65.8333 x 16.8) meters
= 1106 meters.
5). This is a nasty trick question. The whole story is irrelevant,
and we don't even care how far Vinny dropped.
Anything that drops on Earth falls with the acceleration of gravity.
It doesn't matter how big or heavy or small or light it is.
Everything falls with the acceleration of gravity on Earth ... about 9.8 m/s² .
Answers
Answer:
Work being done on the object = 766.04J
Explanation:
Work done by a force is calculated by finding dot product of force and displacement.
W = F . s
F = 25 N
s = 50 m
θ = 40.0°
W = F . s = Fs cosθ = 25 x 40 x cos 40 = 766.04J
Work being done on the object = 766.04J
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The given system is a constant pressure systemwhere the work done is the product of the pressure and the volume change.
- The volume to which the gas expands to is approximately 11 liters
Reasons:
Given parameters;
The original volume, V₁ = 40 cm³
The energy released, E = 950 J
Constant pressure applied, P = 650 torr.
Condition: All energy is converted to work to push back the piston
Required:
The volume to which the gas will expand
Solution;
The work done, W = Energy releases, E = 950 J
Work done at constant pressure, W = P·(V₂ - V₁)
Where;
V₂ - The volume to which the gas will expand
Converting the volume to from cm³ to m³ gives;
V₁ = 40 cm³ = 0.00004 m³
Converting the pressure given in torr to Pascals gives;
650 torr. = 86659.54 Pa.
Therefore, we get;
950 J = 86659.54 Pa. × (V₂ - 0.00004 m³)
Converting to liters gives;
- The volume to which the gas expands, V₂ ≈ 11 liters.
Learn more here:
Answer:
The volume needed to expand the gas is = 11 Lit = 11000 
Explanation:
Given :
Initial volume Lit.
Energy J = 9.38 Lit × atm. ⇒ ( 1 Lit×atm. = 101.325 J )
Pressure 650 torr = 0.855 atm. ⇒ ( 1 torr = 0.00132 atm )
In this example we have to be aware of unit conversion system.
From the laws of thermodynamics,
Here in this example, all the energy of combustion is converted into work to push back the piston
Lit =
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Answer:
space without opposite should be served
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The magnetic field strength will allow the electron to pass between the plates without being deflected is 0.0033 T.
Electric field strength
The electric field strength of the electron is calculated as follows;
E = V/d
E = 200/(0.01)
E = 20,000 V/m
Magnetic field strength
The magnetic field strength is related to electric field in the following formula;
qvB = qE
vB = E
B = E/v
B = (20,000)/(6 x 10⁶)
B = 0.0033 T
Thus, the magnetic field strength will allow the electron to pass between the plates without being deflected is 0.0033 T.
Learn more about magnetic field here: brainly.com/question/7802337
Answer:
3.3 mT
Explanation:
First of all, we need to find the strength of the electric field between the two parallel plates.
We have:
(potential difference between the two plates)
(distance between the plates)
So, the electric field is given by
Now we want the electron to pass between the plates without being deflected; this means that the electric force and the magnetic force on the electron must be equal:
where
q is the electron charge
E is the electric field strength
v is the electron's speed
B is the magnetic field strength
In this case, we know the speed of the electron: , so we can solve the formula to find B, the magnetic field strength: