Answer:
V1 = S / t1 = speed up stalled escalator = 10/94 = .106 m/s
V2 = S / t2 = speed of escalator = 10 / 60 = .167 m/s
V = V1 + V2 combined speed
T = S / V = 1 / t1 + 1 / t2 = t1 * t2 / (t1 + t2)
T = 60 * 94 / (60 + 94) = 36.6 sec
Check: combined speed = .106 + .167 = .273 m/s
T = 10 / .273 = 36.6
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What would happen if the weather became very calm and the wind was not blowing for a few days around the wave hub?
Answer:
the world will become different
when energy looks like it has been used up, what really happens to it?
Answer:
hope that helps
Explanation:
Where does energy go once used? Nothing happens to the energy
Name the two factors that will determine the state of a substance at room temperature
On one stretch of road, any vehicle travelling faster than 25 m/s is breaking the speed limit. The detectors are placed 1.2 m apart. Calculate the speed of a car that takes 0.050 s to travel this distance. Is it breaking the speed limit?
Answer:
Speed = 24 m/s.
No! It doesn't break the speed limit.
Explanation:
The formula we'll be using to find the car's speed:
[tex] \boxed{ \mathsf{speed = \frac{distance}{time} }}[/tex]
The detectors are placed 1.2 m apart.
==> Distance the car travels = 1.2 m
The car, it says, takes 0.050 s to travel that distance.
==> Time taken by the car to travel 1.2 m = 0.050 s
Using the formula mentioned above, let's calculate the speed of the car:
[tex] \sf{speed = \frac{distance}{time} }[/tex]
[tex] \implies \sf{speed = \frac{1.2}{0.050} }[/tex]
On dividing 12 by 0.050 we obtain 24.
[tex] \implies \sf{speed = 24 \: m/s }[/tex]
Any car traveling with a speed that is greater than or equal to 25 m/s is breaking the speed limit.
And since the car in our focus is traveling at 24 m/s that is less than 25 m/s, it doesn't break the speed limit.
The image above shows two opposite forces acting on a rope, what can we say is true about the affect
of the forces on the rope? (SBP3.b)
A It cannot be determined without knowing which man is stronger.
B) It cannot be determined because one man is standing taller than the other.
C) The forces are unbalanced, and net force on the rope moves it to the left.
D) The forces are unbalanced, and net force on the rope moves it to the right.
I have done before and the answer is c
Adolescents develop what is referred to as a(n) __________, which is why they struggle with social relationships during this stage of development. A. Personal invincibility B. Increased sensitivity C. Self-perception D. Imaginary audience Please select the best answer from the choices provided A B C D.
Answer:
imaginary audience
Explanation:
makes adolescence more self-conscious
Define 1 unit of electricity?
Answer:
1 Unit Electricity is the amount of electrical energy consumed by a load of 1 kW power rating in 1 hour..
Explanation:
18. The diagram below shows three flasks with three different liquids in each of them. hot water initial level of the liquid Liquid A Liquid B Liquid C The volume and temperature of the liquids in the flask are the same. All three flasks were placed inside a hot water trough. The level of the liquids increases. (a) (b) Why does the level of the liquids rises up? The liquids gain heat from the hot water, expand and move upwards Different liquids rises to a different level after heating. Explain the reason. Different liquids expand by different amounts when beated by the same temperature (c) Give one application of this expansion.
Different liquids have different rates of expansion. I think we can fairly say that (most) substances expand when heating because they vibrate more, because they have more kinetic energy, so there's a pushing force between molecules. For almost the same reason, gasses expand.The change in volume us independent of the original mass but depends on original volume.
A mercury thermometer is based on the application of thermal expansion of liquids. The bulb of the thermometer is kept in contact with a hot body, and mercury expands and level of mercury rises in the tube
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Which material is a good conductor of electricity?.
Answer:
Copper
Explanation:
Copper, its ne of the most used materials because of their ability to be the best conductors. Other materials that are sometimes used as conductors are silver, gold, and aluminum.
[tex]\bold{\huge{\underline{ Hola \: Brainlians!!! }}}[/tex]
Three particles A, B and C are situated at the vertices of an equilateral triangle ABC of side d at time t = 0. Each of the particles moves with constant speed v. A always has its velocity along AB, B along BC and C along CA. At what time will the particles meet each other ?
- Don't want spam or copied answers
- Don't be greedy for points
- Best answer will be awarded with brainliest.
Given :-
Three particles A, B and C are situated at the vertices of an equilateral triangle ABC.The side of the triangle is d .A always has its velocity along AB, B along BC and C along CA.To Find :-
Time at which the particles will meet .Solution :-
See attachment .
Firstly break the velocity of A , into it's vertical components . That will be ,
[tex] v_A = v_A cos60^o + v_A sin60^o [/tex]
Now the component , [tex]v_A cos60^o [/tex] coincides on side AC and is directed from A to C . Along CA, the velocity of particle C is directed . So both are in opposite directions.
So , the relative velocity of C with respect to A will be ,
[tex] v_{CA}= v_C - v_A [/tex]
Substitute ,
[tex] v_{CA}= v - ( - v cos 60^o) [/tex]
Value of cos 60° is 1/2 ,
[tex] v_{CA}= v + v\bigg(\dfrac{1}{2}\bigg)=v +\dfrac{v}{2}[/tex]
Add the terms,
[tex] v_{CA}= \dfrac{2v + v}{2}=\dfrac{3v}{2}[/tex]
Hence , now we can find the time taken by A and C ,to meet each other will be ,
Since the speed is constant , we can use distance = speed*time , as ;[tex]s = v t [/tex]
Substitute ,
[tex]d = \dfrac{3v}{2} t [/tex]
Multiplying both sides by 2 ,
[tex] 2d = 3vt [/tex]
Dividing both sides by 3v ,
[tex] t = \dfrac{2d}{3v} [/tex]
Similarly , taking any two particles you will get the same time .
Hence the particles meet after 2d/3v time .
I hope this helps .
Answer:
never
Explanation:
Particles moving on paths that don't meet at a point will be particles that never meet. Even if the paths meet at a point, which these don't, the particles may not meet if they arrive at different times.
__
Consider the diagrams in the attachments. In order, they show the positions of the particles shortly after takeoff, midway along the line, and after they have gone farther than the length of the line. The point of closest approach is shown in the second attachment, when the particles are halfway along the line.
Consider particles A and C. Their north/south direction is 'north' for each of them. They both have the same velocity in the 'north' direction, but have started at different points, so can never meet. Those two particles have opposite velocities in the east/west direction, so can pass each other (which they do in the second attachment), but cannot meet.
Aball is thrown horizontaly from the top of a building with an initial velocity of 15 meters per second. At the same instant, a second ball is dropped from the top of the building. Which of the following is the
same for the two balls?
Answer:
Both balls have the same downward acceleration (and speed)
smooth surface is also called ......... surface
Answer:
Plane (or) regular surface
Explanation:
A smooth surface is also called as plane surface. (It is like a mirror)
LAST QUESTION FOR MY FINALS
How far does a model rocket accelerating at +40m/s^2 go in 2 seconds if launched from rest?
Apply second equation of kinematics
[tex]\\ \tt\longmapsto s=ut+\dfrac{1}{2}at^2[/tex]
[tex]\\ \tt\longmapsto s=\dfrac{1}{2}(40)(2)^2[/tex]
[tex]\\ \tt\longmapsto s=20(4)[/tex]
[tex]\\ \tt\longmapsto s=80m[/tex]
Answer:
According to the Given Statement
Acceleration a of model rocket is + 40m/s²
Time for the rocket accelerate t is 2 s
Its initial velocity u is 0m/s ( it is at rest )
We have to calculate the height attained by rocket .
Using Kinematic Equation
h = ut + ½ at²On substituting the value we obtain
➥ h = 0×2 + ½ × 40 × 2²
➥ h = 0 + 20 × 4
➥ h = 80m
So, the height attained by the rocket is 80 metres.
When my phone is plugged into a 120 Volt outlet, it takes 20 minutes to fully charge it with 32kJ of energy.
How much current if flowing through the charging cord?
A) 0.13 Amps
B) 0.22 Amps
C) 0.33 Amps
D) 0.64 Amps
E) 13 Amps
F) 22 Amps
G) 33 Amps
H) 64 Amps
There is only one answer, please help!
The Current flowing in the charger is 0.22 Amps.
Energy consumed
The energy consumed by the phone is calculated using the following relationship.
E = IVt
where;
I is the current flowingV is the voltaget is the timeCurrent flowing in the chargerThe Current flowing in the charger is calculated as follows;
[tex]I = \frac{E}{Vt} \\\\I = \frac{32,000}{120 \times (20 \times 60 )} \\\\I = 0.22 \ Amps[/tex]
Learn more about electrical energy here: https://brainly.com/question/60890
what is the word when 2 waves meet and affect each other
Answer:
wave interference
Explanation:
Wave interference is the phenomenon that occurs when two waves meet while traveling along with the same medium. The interference of waves causes the medium to take on a shape that results from the net effect of the two individual waves upon the particles of the medium. To begin our exploration of wave interference, consider two pulses of the same amplitude traveling in different directions along with the same medium.
Suppose an asteroid orbiting the sun had an orbital period of 7. 5 years. What would its orbital radius be?.
By using the orbital period equation we will find that the orbital radius is r = 4.29*10^11 m
What is the orbital period?
This would be the time that a given body does a complete revolution in its orbit.
It can be written as:
[tex]T = \sqrt{\frac{4*\pi ^2*r^3}{G*M} }[/tex]
Where:
π = 3.14G is the gravitational constant = 6.67*10^(-11) m^3/(kg*s^2)M is the mass of the sun = 1.989*10^30 kgr is the radius, which we want to find.Rewriting the equation for the radius we get:
[tex]T = \sqrt{\frac{4*\pi ^2*r^3}{G*M} }\\\\r = \sqrt[3]{ \frac{T^2*G*M}{4*\pi ^2} }[/tex]
Where T = 7.5 years = 7.5*(3.154*10^7 s) = 2.3655*10^8 s
Replacing the values in the equation we get:
[tex]r = \sqrt[3]{ \frac{(2.3655*10^8 s)^2*(6.67*10^{-11} m^3/(kg*s^2))*(1.989*10^{30} kg)}{4*3.14 ^2} } = 4.29*10^{11 }m[/tex]
So the orbital radius is 4.29*10^11 m
If you want to learn more about orbits, you can read:
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The mechanical advantage of a machine is 4• What does it mean?
The mechanical advantage of a machine is 4. It means that your effort is multiplied 4 times.
•You have a graduated cylinder which is filled with water up to 150 ml mark. You add a hunk of iron, and the water level rises to 425 ml. What is the mass of the iron?
Answer:
275
Explanation:425- 150 =275mlml=gm
the two forces shown acting on square . determine the magnitude of F, which will cause zero moment at point 0
Answer: u excited for the super bowl?
Explanation:
A fishing boat uses a sonar device which sends sound waves to the water that travel at 1000 m/s. The fishing boat detects a signal from a school of fish 1 second after the sonar signal leaves the boat. How far is the school of fish below the boat?
A.1000 m
B.500 m
C.250 m
D.10,000 m
I think its D answer
sorry I dont have explanation but I think its D
If an object has an initial velocity of 2.0 m/s and its rate of change in velocity is 3.0 m/s2
calculate its final velocity after 4.0 seconds.
Answer:
14m/s2
Explanation:
initial velocity=2m/s
final velocity =?
time=4s
acceleration=3.0m/s
v=u+at
v=(2)+(3*4)
v=14m/s
by substituting the values in the equation we get the value 14m/s.
A block of aluminum measures 4.0 cm x 5.0 cm x 2.0 cm is completely immersed in a tank of water.
Calculate the buoyant force and the mass of the displaced water (Remember the density of water is 1 g/mL) (g=10m/s2)
Answer:
upthrust or BUOYANT FORCE =Vdg
volume=LWH
upthrust=(4cm×5cm×2cm)×1g/cm²×g
upthrust=40cm³×1g/cm³×g
upthrust=40gf or 0.04kg×10m/s²=0.4N
weight of the displaced liquid is upthrust.
so mass=40g or 0.04kg
upthrust=40gf or 0.4Nand mass of the displaced liquid=40g or 0.04kg
please mark brainliest, hope it helped
Social cognitive theory centers around learning cognition and spirituality psychoanalysis economic status
Social cognitive theory centers around: A. learning.
What is cognitive development?Cognitive development can be defined as the development of thought processes, learning skills, knowledge and problem-solving abilities in living organisms such as humans, especially from infancy through adulthood.
What is social cognitive theory?Social cognitive theory refers to a theoretical perspective which states that human behavior is typically learned and developed based on interactions with other people and the natural world.
In conclusion, social cognitive theory centers around learning.
Read more on social cognitive theory here: https://brainly.com/question/8893006
how do chemical factors in the environment affect human health?
Answer:
A number of specific environmental issues can impede human health and wellness. These issues include chemical pollution, air pollution, climate change, disease-causing microbes, lack of access to health care, poor infrastructure, and poor water quality.
Explanation:
hope it will help you have a great day bye and Mark brainlist if the answer is correct
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How long (in seconds) would it take a machine to do 13,771 joules of work if the power rating of the machine is 0.38 horsepower? (Give the answer without units and round it to the nearest whole number.)
A spherical glass ornament is 6 cm in diameter. If an object is placed 10.5 cm away from the ornament, where will its image form? What is the magnification?
The magnification is mathematically given as
M= 0.125
Lens magnificationQuestion Parameters:
A spherical glass ornament is 6 cm in diameter.
If an object is placed 10.5 cm away from the ornament, where will its image form
Generally, the mirror equation for ornament is mathematically given as\
1/q = 2 / r - 1/p
Therefore
1/q = 2 / (-3 cm) - 1/(10.5 cm)
q = -1.31 cm
Therefore, the magnification
M = -q/p
M= -(-1.31 m)/ (10.5 cm)
M= 0.125
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8. Early in the Morning, an object's shadow will extend to the North. * True False
False-
I orignally had it at "true" BUT I was actually wrong.
a 35 kg chair is lifted 5M off the ground. what is the potential energy?
Answer:
mass × gravity ×height. so....that.. Ep = mgh. Ep= 35×9.8×5. Ep = 1715.
Explanation:
In which situation is the speed of the car constant while its velocity is changing?
A) The car travels down a straight track at 30
B) The car travels around a circular track at 30
a
) The car begins from rest and accelerates to 20
m
2015
D) The car begins traveling at 30
m
and slows to 15 m
S
S
Answer:
B, the car travels around a circular track at 30 m.
Explanation:
What physical quantity describing motion does the driver neglect when he/she practices tailgating? [Choices: distance, displacement, speed, velocity or acceleration]
The physical quantity that is neglected when practicing tailgating is :
Distance TailgatingTailgating is the act of driving or following a vehicle very closely and this can be very dangerous as well, during this act the distance between the vehicles is been neglected by the driver.
Distance is the difference in position of an object with time in respect to another object. ( i.e It is a scalar quantity ).
Hence we can conclude that the physical quantity that is neglected when practicing tailgating is Distance.
Learn more about tailgating : https://brainly.com/question/4734287