Answer:
it is preaty simple
Explanation:
72/2=36
i hope, that helps, if no i'm sorry
Which car has the most momentum? A. 1820 kg car that is traveling east at 30 m/s
Answer:
58600 = momentum answer
the cannon ball follows a ___ path
A) circular
B)parabolic
Answer:
B) parabolic
Explanation:
A parabolic path is defined as :-
"The angle of trajectory of a projectile", such as a cannon ball, which moves in such a path after being launched from a cannon.
BRAINLIETS IF CORRECT
What does Hess's law say about the enthalpy of a reaction? A. The enthalpy of a reaction does not depend on the reactant path taken. B. The enthalpy of a reaction depends on the pathway the reactants followed See SUS C. The sum of the enthalpy and entropy is the free energy of a reaction. O D. The entropy of a reaction is the sum of the enthalpies of intermediate steps.
Answer: B
Explanation: I think its B or A but mostly B
Answer:
The enthalpy of a reaction does not depend on the reactant path taken
Explanation:
i just took the test on a pex :)
Why can’t an object travel in a circle with no acceleration?
Answer:
bevz there may be a inward for acting upon to
cause inward acceleration
HELPPPPPP PLEASEEEEEEE-
Answer:
One piece has a north pole only, and the other piece has à soutn pole only.
Explanation:
mark me brainliest!!
Answer: B
Explanation:
When we split a magnet in half, both halves act as magnets, with each having a north and south pole. As with the original magnet, the matching north and south poles remain on the sides as in the original magnet. This means that the 2 broken sides must be polarized in the opposite direction.
How many oxygen atom has protein
Answer:
1 or 2
Explanation:
Compared to RNA and DNA backbone, protein backbone has a relatively simple chemical structure - a nitrogen atom, two carbon atoms, one or two oxygen atoms, and a few hydrogens.
How might having a testing site like the "Mars Yard" be helpful in mission planning? Provide an example of how this might help scientists solve a problem during a mission.
Your answer should include at least two complete sentences.
Be sure to check your grammar and spelling.
We can say that having a testing site such as the mars yard helps scientists to test previously theoretical knowledge in a realistic environment.
Why are testing sites important?Testing sites help scientists by providing a realistic place to test knowledge that may have previously been only theoretical through performing experiments on such test sites. This is of vital importance in the detection of errors in order to achieve a successful future mission.
Therefore, we can confirm that having a testing site such as the mars yard helps scientists to test previously theoretical knowledge in a realistic environment.
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A 60 kg girl falls off of a waterfall and loses 10 kJ of GPE. What was her height?
GPE=mgh
10³=60 x 9.8 x h
h=1.7 m
The value of her height will be 1.7 m. The formula for the gravitational potential energy is used in the given problem.
What is gravitational potential energy?Gravitational potential energy is found as the product of the mass, gravity, and height attained by the object during a fall.
The given data in the problem is;
m is the mass of a girl =60 kg
E is the gravitational potential energy= 10 kJ
h is the height traveled during free fall.
The expression for the gravitational potential energy is;
[tex]\rm \ GPE(E) = mgh \\\\ h = \frac{E}{mg} \\\\ h = \frac{10\times 10^3 }{60 \times 9.81 } \\\\ h= 1.7 \ m[/tex]
Hence her height will be 1.7 m.
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Which diagram represents diffuse reflection?
Answer:
A ,D
....
....
.....
....
....
..
Figure B and Figure C represents diffuse reflection. So, the correct options are B and C
What is Diffuse reflection?Diffuse reflection is defined as the reflection of light or other waves or particles from a surface, such that a ray incident on a surface is scattered at many angles rather than just at a single angle, as is the case with specular reflection.
For example, an illuminated ideal diffuse reflective surface will have the same brightness from all directions in the hemisphere surrounding the surface, i.e. Lambertian reflectance.
If the surface is microscopically rough, the light rays will be reflected and scattered in many different directions as in figure B and C above, with rough surfaces showing diffuse reflections.
Thus, Figure B and Figure C represents diffuse reflection. So, the correct options are B and C
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If a student weighs 100 pounds on Earth, how much more or less would she weigh on Pluto than Mars?
A. She would weigh 38 pounds less on Pluto
B. She would weigh 38 pounds more on Mars
C. She would weigh 31 pounds more on Mars
D. She would weigh 31 pounds less on Mars
Answer:
c because that's the answer
She would weigh 31 pounds more on Mars than on Pluto. Therefore option C is correct.
To calculate the differences in weight using the given information.
1. Weight on Earth: 100 pounds
Now, let's calculate the weight differences for Pluto and Mars:
2. Weight on Pluto:
Pluto's gravity is about 0.06 times that of Earth's.
Weight on Pluto = Weight on Earth × Pluto's gravity
Weight on Pluto = 100 pounds × 0.06 = 6 pounds
3. Weight on Mars:
Mars' gravity is about 0.38 times that of Earth's.
Weight on Mars = Weight on Earth × Mars' gravity
Weight on Mars = 100 pounds × 0.38 = 38 pounds
Comparing the weight differences:
Weight difference between Earth and Pluto = 100 pounds - 6 pounds = 94 pounds
Weight difference between Earth and Mars = 100 pounds - 38 pounds = 62 pounds
Therefore, the correct answer is C. She would weigh 31 pounds more on Mars than on Pluto.
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Chemical bonds form between __________.
Group of answer choices
the protons and neutrons within the nucleus
the protons within the nucleus
the electrons that are the furthest from the nucleus
the electrons that are closest to the nucleus
Explanation:
the electrons that are the furthest from the nucleus
You drive in a straight line at 18.0 m/s m / s for 10.0 miles, then at 34.0 m/s m / s for another 10.0 miles.
Answer:
1 mile = 1609 meters
10 miles = 16090 meters
16090m/(24.0m/s) = 670s
16090m/(30.0m/s) = 536s
Average Speed = Total distance/Elapsed time
Average Speed = [16090m(2)]/(670s+536s) = 32080m/1206s = 26.7m/s
(a) The car's average speed is less than 27.0m/s
(b) The car's average speed is 26.7m/s
Explanation:
1 mile = 1609 meters
10 miles = 16090 meters
16090m/(24.0m/s) = 670s
16090m/(30.0m/s) = 536s
Average Speed = Total distance/Elapsed time
Average Speed = [16090m(2)]/(670s+536s) = 32080m/1206s = 26.7m/s
(a) The car's average speed is less than 27.0m/s
(b) The car's average speed is 26.7m/s
A 50.0 kg rock starting from rest free falls through a distance of 300.0 m with no air resistance. Find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earth’s velocity. Earth’s mass is 6.0 × 1024 kg. Show all your work, assuming the rock-earth system is closed
Answer:
Momentum change of the rock = 3835 kgm/s
Chane in earth's velocity = 6.4 x 10⁻²² m/s
Explanation:
m = 50.0 kg, M = 6.0 x 10²⁴ kg
d = 300.0 m
final velocity of rock = v, v² = 2gd = 2 * 9.81 * 300, so v = 76.7 m/s
Momentum change of the rock = mv = 50.0 * 76.7 = 3835 kgm/s
Inital momentum of the rock+earth system = 0
final momentum = 0 (momentum conservation)
momentum of rock and momentum of earth are same magnitude and opposite directions.
mv - MV = 0
Chane in earth's velocity = mv/M = 3835/(6.0 x 10²⁴) = 6.4 x 10⁻²² m/s
Since antiquity people have used the sling to increase the speed of a rock and send it swiftly in a specific
direction. While the rock is being spun overhead, the force that keeps the rock moving in a circle is provided by
the tensile strength of the sling material. Leather has a fairly high tensile strength, so that a strip of leather with
a cross-sectional area of 0.25 cm2can withstand a pulling force of 800 N. Assume that, for a certain sling, 8.00
10²N is the largest possible centripetal force. If the rock in the sling is 0.40 m from the center of rotation and has
a tangential speed of 6.0 m/s, what is the largest mass the rock can have?
Show Your Work
Answer:
"F = 52.93 [N]
Since the Rock is thrown upwards, there are only two forces, one is the force of the rubber (55[N]) and the other is the force of gravitational acceleration acting in the opposite direction to the movement of the rock, therefore this acceleration will be taken as negative.
F = 55 - m*g
where:
F = total force [N] (units of Newtons)
m = mass = 0.21 [kg]
g = gravity acceleration = 9.81 [m/s²]
F = 55 - (0.21*9.81)
F = 52.93 [N]"
Data
Table A
Record your data either in your lab notebook or in the tables below.
Cart Speed
Cart Speed
Elapsed Time
(s)
(Low fan speed) (Medium fan speed)
(cm/s)
(cm/s)
16.4
23
Cart Speed
(High fan speed)
(cm/s)
31.7
1
31.5
64.0
2
54
36
89.8
3
118.1
4
5
6
7
The speed will be calculated by dividing the distance traveled by the object by the time elapsed.
What is speed?Based on the information given, an overview will be given to you on how to calculate the speed of the cart.
Average speed is a scalar quantity and is gotten by dividing the distance by time taken. For example, if the distance traveled is 100km and the time taken is 4 hours. The speed will be:
= Distance/Time
= 100/4.
= 25km/h.
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- A fourth harmonic is desired by a conductor of musicians. What type of instrument could and could
not create such a harmonic. You do not need to answer in terms of the instrument name, only
whether it is open or closed ended.
What is the difference between the fourth harmonic and the nth harmonic?
The fourth harmonic has frequency f4= v/λ4= 4v/2L = 4f1, and, to generalise, The nthharmonic has frequency fn= v/λn= nv/2L = nf1. All waves in a string travel with the same speed, so these waves with different wavelengths have different frequencies as shown.
What is the difference between a sonic boom and a shock wave?
Answer:
When a sound source moves faster than the speed of sound, a shock wave is produced as the sound waves interfere. A sonic boom is the intense sound that occurs as the shock wave moves along the ground.
More importantly, all of the energy gets concentrated into a very small distance this is called a shock wave. In this case, the observer does not hear the approaching source at all until the shock wave hits with all of the energy in the wave. For sound waves, this can cause a very loud noise, called a sonic boom.
Sonic booms produced by aircraft flying supersonic at altitudes of less than 100 feet, creating between 20 and 144 pounds overpressure, have been experienced by humans without injury. Damage to eardrums can be expected when overpres- sures reach 720 pounds
Explanation:
marke as brainliest
Using the following information, calculate the theoretical lower limit of electricity consumption for melting scrap steel in terms of [kWh/ton]. The melting temperature of steel is about 1,500 [℃] and the heat capacity of steel is around 0.466 [J/g℃]. The latent heat of the fusion of steel is approximately 276 [J/g]. How far from this limit were EAF’s by the year 2000?
The theoretical electricity consumption is 268.179 kilowatt-hours per metric tonne.
The theoretical minimum of electricity consumption is 60.340 % of the practical minimum of electricity consumption.
Comparison of theoretical electricity consumption for steel production by electric arc furnace with real consumptionThe theoretical electricity consumption is equal to the sum of sensible heat ([tex]q_{s}[/tex]) and latent heat ([tex]q_{l}[/tex]) needed to melt a metric ton of steel, in kilowatt-hours per metric tonne:
[tex]q = q_{s}+q_{l}[/tex] (1)
By definitions of sensible and latent heat, we have the following formulas:
[tex]q = c\cdot (T_{f}-T_{o}) + L_{f}[/tex] (1)
Where:
[tex]c[/tex] - Specific heat of steel, in kilowatt-hours per metric ton-degree Celsius.[tex]T_{o}[/tex] - Initial temperature, in degrees Celsius.[tex]T_{f}[/tex] - Final temperature, in degrees Celsius.[tex]L_{f}[/tex] - Latent heat of fusion of steel, in kilowatt-hours per metric ton.If we know that [tex]c = 1.294\times 10^{-1}\,\frac{kWh}{ton\cdot ^{\circ}C}[/tex], [tex]T_{o} = 20\,^{\circ}C[/tex], [tex]T_{f} = 1500\,^{\circ}C[/tex] and [tex]L_{f} = 76.667\,\frac{kWh}{ton}[/tex], then the theoretical electricity consumption is:
[tex]q = \left(1.294\times 10^{-1}\,\frac{kWh}{ton\cdot ^{\circ}C} \right)\cdot (1500\,^{\circ}C-20\,^{\circ}C)+76.667\,\frac{kWh}{ton}[/tex]
[tex]q = 268.179\,\frac{kWh}{ton}[/tex]
The theoretical electricity consumption is 268.179 kilowatt-hours per metric tonne. [tex]\blacksquare[/tex]
According to the document "Theoretical Minimum Energies to Produce Steel for Selected Conditions" done by R.J. Fruehan et al. in March 2000. The practical minimum of electricity consumption for a electric arc furnace (EAF) is:
[tex]q_{real, min} = 444.444\,\frac{kWh}{ton}[/tex]
This indicator consider common energy losses throughout steel production.
The theoretical minimum of electricity consumption is 60.340 % of the practical minimum of electricity consumption. [tex]\blacksquare[/tex]
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After being accelerated to a speed of 1.17×105 m/s , the particle enters a uniform magnetic field of strength 0.800 T and travels in a circle of radius 35.0 cm (determined by observing where it hits the screen as shown in the figure). The results of this experiment allow one to find m/q .
Find the ratio m/q for this particle.
Express your answer numerically in kilograms per coulomb.
The ratio m/q for this particle is mathematically given as
m/q=2.39*10^{-6}
What is the ratio m/q for this particle?Question Parameters:
After being accelerated to a speed of 1.17×105 m/s
the uniform magnetic field of strength 0.800 T and travels in a circle of radius 35.0 cm
Generally, the equation for the Centrifugal force is mathematically given as
[tex]qvB=\frac{mv^2}{r}[/tex]
Therefore
m/q=(0.8*0.35)/(1.17*10^{5})
m/q=2.39*10^{-6}
In conclusion, the ratio m/q for this particle
m/q=2.39*10^{-6}
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While traveling home at dusk, a motorcyclist gets on the highway and increases the combined mass (400 kg
for the motorcycle and 150 kg for the motorcyclist) from 30 mi/hr to 70 mi/hr in 3 seconds. While struggling to
clean his helmet later that evening, he wonders what would have been the acceleration of one of those bugs
striking his helmet if it had a mass of 5 g.
The acceleration of one of those bugs is equal to 305mi/s.
Acceleration calculation
To calculate the insect's acceleration, the action and reaction force of the impact must be considered.
As the insect will hit the helmet, the force it hits is the same force it receives, so we can make the following expression:
[tex]m_m \times a_m = m_b \times a_b[/tex]
[tex]550 \times 0.0027 = 5 \times 10^{-3} \times a_b[/tex]
Speed has been converted to miles per second
[tex]a_b = 305 mi/s[/tex]
So, the acceleration of one of those bugs is equal to 305mi/s.
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Running with an initial velocity of +10.2 m/s m / s , a horse has an average acceleration of -1.77 m/s2 m / s 2 . How much time does it take for the horse to decrease its velocity to +6.1 m/s m / s ?
Using first equation of kinematics
[tex]\\ \rm{:}\dashrightarrow v=u+at[/tex]
[tex]\\ \rm{:}\dashrightarrow v-u=at[/tex]
[tex]\\ \rm{:}\dashrightarrow 6.1-10.2=-1.77t[/tex]
[tex]\\ \rm{:}\dashrightarrow -4.1=-1.77t[/tex]
[tex]\\ \rm{:}\dashrightarrow t=2.32s[/tex]
A ball has a mass of 0.5 kg. Dropped from a cliff top. the ball hits the sea below at a speed of 10 m/s. What was the ball's gravitational potential energy before it was dropped?
Answer:
25 J
Explanation:
Using Law of Conservation of Energy
Total Energy before = Total Energy After
Potential Energy1 + Kinetic Energy1 = Potential Energy2 + Kinetic Energy2
Potential Energy1 + 0 = 0 + Kinetic Energy2
Potential Energy1 = [tex]\frac{1}{2}*m*v^{2}[/tex] =0.5*0.5*10*10= 25 J
l
If iron filings were sprinkled evenly across the
entire paper circle, at which location would
the
grealest concentration of iron filings be found after
30 seconds?
Determine the magnitude and direction of vector V2 such that V=2V1 + V2 acts along the positive z-axis having a magnitude of 20 from which vector V = 20i- 15j + 15k.
Answer:
Explanation:
V₁ = <20, -15, 15>, V = <0, 0, 20>
V₂ = V - 2V₁ = <0, 0, 20> - <40, -30, 30> = <-40, 30, -10> = -40i + 30j - 10k
magnitude = [tex]\sqrt{40^2+30^2+10^2}}=51[/tex]
Give a reason, why the bulb is not glowing in the given circuit A. O Closed circuit B. o Complete circuit C. O Incomplete circuit D. O Cell is not connected. Previous Next
Answer:
Closed circuit
Explanation:
See the switch is not connected with circuit.
It's still off So the bulb is not glowingWhat is the weight of a box with a mass of 150 kg on Earth?
The weight is equal to 'mg' where m is the mass and the g is the gravitational constant on that certain planet
In this case, the mass is 150 kg and the gravitational constant is about 9.8.
so the weight = 150 * 9.8 = 1470 Newtons.
Hope that helped!
The weight of the box with the given mass on Earth is 1470 Newtons.
Given the data in the question;
Mass of box; [tex]m = 150kg[/tex]Weight of box; [tex]W = \ ?[/tex]WeightWeight is the force acting on the mass of a particular object or particle due to gravity. It is the gravitational force acting on an object with mass. It is measured in newtons. It is expressed as;
[tex]W = m * g[/tex]
Where m is mass of object and g is acceleration due to gravity on earth ( [tex]g = 9.8m/s^2[/tex] )
To find the weight of the box, we substitute our values into the expression above;
[tex]W = 150kg * 9.8m/s^2\\\\W = 1470kgm/s^2\\\\W = 1470N[/tex]
Therefore, the weight of the box with the given mass on Earth is 1470 Newtons.
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Find the velocity of the watch whose radius is 5 meter and time is 2 seconds
Question :-
Find the Velocity of the Watch whose Radius is 5 meter and Time is 2 seconds .Answer :-
Velocity of the Watch is 2.5 m/s .[tex] \rule {180pt} {2pt} [/tex]
Given :-
Radius = 5 meterTime = 2 seconds
To Find :-
Velocity = ?Solution :-
As per the provided information in the given question, we have been given that the Radius of the Watch is 5 meter , Time is given 2 seconds . And, we have been asked to calculate the Velocity of the Watch .
For calculating the Velocity , we will use Formula :-
Velocity = Displacement / TimeTherefore , by Substituting the given values in the above Formula :-
⇒ Velocity = Displacement / Time
⇒ Velocity = 5 / 2
⇒ Velocity = 2.5
Hence :-
Velocity = 2.5 m/s .[tex] \underline {\rule {180pt} {4pt}} [/tex]
⇒ Velocity = Displacement / Time
⇒ Velocity = 5 / 2
⇒ Velocity = 2.5
Question 12 of 20
In which scenario will the two objects have the least gravitational force
between them?
O A. Mass of object 1 = 15 kg
Mass of object 2 = 12 kg
Distance between objects = 1.5 m
O B. Mass of object 1 = 15 kg
Mass of object 2 = 12 kg
Distance between objects = 0.5 m
C. Mass of object 1 = 12 kg
Mass of object 2 = 12 kg
Distance between objects = 1.5 m
D. Mass of object 1 = 12 kg
Mass of object 2 = 12 kg
Distance between objects = 0.5 m
Answer:
C. Mass of object 1 = 12 kg
Mass of object 2 = 12 kg
Distance between objects = 1.5 m
Explanation:
From the universal gravitation equation
Force of gravity between two objects is directly proportional to the product of mass 1 and mass 2 and inversely proportional to the square of the distance apart
Option B is has the greatest factor
Force of gravity between the objects = (15 x 12)/(0.5)^2
Force of gravity between the objects = 720G
Option C has the least factor and the answer
Force of gravity between the objects = (12 x 12)/(1.5)^2
Force of gravity between the objects = 64G
G = The constant of proportionality = 6.673 x 10-11 N m^2/kg^2
how much pressire is created when a force of 55n is applied over sn area of 8m²
how much pressure is created when a force of 55N is applied over an area of 8m²
SolutionWe have been asked to determine the pressure exerted when given magnitude of force acting on given area.
[tex]☄\bf \qquad \mathcal{Pressure} = \mathcal{\dfrac{Force}{Area}}[/tex]
Put all given value we obtain
[tex]\qquad \sf \longrightarrow \:Pressure \: = \dfrac{55}{8} \\ \\ \\ \qquad \sf \longrightarrow \:Pressure \: = \cancel\dfrac{55}{8} \\ \\ \\ \qquad \sf \longrightarrow \:Pressure \: = 6.875 \: Pa.[/tex]
Therefore,
6.875 Pascal Pressure is created .precaution taken to ensure accuracy