Answer:
To Increase National Security
Explanation:
Light refracts when it
Two positive charges are placed near each other what happens between the charges
Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
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Answer: coll
Explanation:
Unpolarized light can undergo polarization by this means off a nonmetallic surfaces.
Answer:
तिकडी एकच
Explanation:
आप सल क्ल वल दन रव दंचंबी एक गम ok plz
2.List two changes an unbalanced force can cause.
Answer:
By applying an unbalanced force, you can change the motion of an object. Unbalanced forces can make an object at rest start moving, make a moving object stop, or change the direction and speed of the object.
Explanation:
Three resistors of values 2 Q, 3 Q and 5 Q are connected in series with a battery of voltage 6.0 V. Calculate the current through each of the resistors, and the current through the battery.
Answer:
Current = 0.6 A
Explanation:
Given that,
Three resistors 2 ohms, 3 ohms and 5 ohms are connected in series with a battery of voltage 6 V.
In series combination of resistors, the current through each resistor is the same while the voltage divides.
The equivalent resistance in this case is given by :
[tex]R_{eq}=R_1+R_2+....[/tex]
Put all the values,
[tex]R_{eq}=2+3+5\\\\R_{eq}=10\ \Omega[/tex]
Let I be the current. Using Ohm's law,
[tex]V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{6}{10}\\\\I=0.6\ A[/tex]
So, the current through each resistor and the current through the battery is equal to 0.6 A.
1. Astronomical observatories have been available since ancient times, and many cultures set aside special sites for astronomical observations. The thing modern observatories have that was missing from these older observatories until about 1610 was: a. a dark site, where lights did not get in the way b. graduate students or other assistants for sharing the astronomer’s work c. a method of keeping good records d. a way of measuring from what general direction in the sky a beam of light was coming e. telescopes
Answer:
e telescopes
Explanation:
may i be marked brainliest?
afootball of mass 550g is at rest on the ground the football is kicked with a force of 108 newton the footballers boot is in contact with the ball for 0.3 minute what is the kenitic
energy of the ball
If "0.3 minute" is correct, then it's 9,543,272 Joules.
If it's supposed to say "0.3 SECOND", then the KE is 2,651 Joules.
A seesaw is 4.0m long with a pivot at its midpoint. A boy who weighs 400N sits at a distance of 1.5m from the pivot. His sister weighs 300N. Calculate the distance at which the girl must sit if the beam is ti be balanced
Answer:
the girl must sit 2 cm from the pivot at the opposite end of the seesaw.
Explanation:
Given;
length of the seesaw, L = 4.0 m
weight of the boy, W₁ = 400 N
position of the boy from the pivot, d₁ = 1.5 m
weight of her sister, W₂ = 300 N
First, make a sketch of this information given;
0---0.5m---------------------Δ--------------------------4m
↓<--------1.5m-------> <---------x--------->↓
400 N 300N
Apply the principle of moment about the pivot, to determine the value of x;
Sum of anticlockwise moment = sum of clockwise moment
400(1.5) = 300(x)
600 = 300x
x = 600/300
x = 2 cm
Thus, the girl must sit 2 cm from the pivot at the opposite end of the seesaw.
There are 2 ways of collecting the sun’s energy. What are they? Give an example of each.
Electromagnets are used in to produce a rotating magnetic field that turns a rotor.
A) TVs
B) computers
C) generators
D) motors
Answer:
A motor
Explanation:
(I'm not that good in physics but from what I know it might be motor or generator, I'm not 100% sure on this answer)
A 2.0 kg 2.0kg2, point, 0, start text, k, g, end text cart moving right at 5.0 m s 5.0 s m 5, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction on a frictionless track collides with a 3.0 kg 3.0kg3, point, 0, start text, k, g, end text cart initially at rest. The 2.0 kg 2.0kg2, point, 0, start text, k, g, end text cart has a final speed of 1.0 m s 1.0 s m 1, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction to the left. What is the final speed of the 3.0 kg 3.0kg3, point, 0, start text, k, g, end text cart?
The final speed of the 3.0 kg cart is 4 m/s.
What is conservation of momentum principle?When two bodies of different masses move together each other and have head on collision, they travel to same or different direction after collision.
The external force is not acting here, so the initial momentum is equal to the final momentum. For elastic collision, final velocities is different for both the bodies.
m₁u₁ +m₂u₂ = m₁v₁ +m₂v₂
A 2.0 kg cart moving right at 5.0 m/s on a frictionless track collides with a 3.0 kg cart initially at rest. The 2.0 kg cart has a final speed of 1.0 m/s to the left.
Substitute the values for m₁ = 2kg, m₂ =3kg, u₁ =5 m/s and u₂ =0 m/s, then the final velocity will be
3x0 +2x5 = -2x1 + 3v₂
v₂ = 4 m/s
Thus, the the final velocity 3.0 kg cart is 4 m/s.
Learn more about conservation of momentum principle.
https://brainly.com/question/14033058
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If the resistance of an electric iron is 40 and a current of 2.2 A flows
through the resistance. Find the voltage between two points. *
Answer:
88 volts
Explanation:
Ohm's law gives the formula : I = V/R
In this case, since we are solving for voltage, you simply rearrange the equation to be : V = I * R
Therefore, given the resistance and current, you just plug in the numbers.
Voltage = 40 ohms * 2.2 amperes
Voltage = 88 volts
resistors with value of 4 and 6 are connected in parallel to one another and the combination is connected in series to a 36 V battery. Find the current through each resistor and the power dissipated by each resistor
4-year-old becomes frightened of the dark and refuses to go to sleep at night. How would a psychoanalyst and a behaviorist differ in their views of how this problem developed?
Answer:
A psychoanalyst would see the 4-year-old as having an unresolved conflict where the brain judges or evaluates how good or bad the darkness is, or the usefulness of sleeping in the dark at night based on a comparison, due to the child's exploration of the world around him. A psychoanalyst might see the child's refusal to sleep at night due to the dark as a fear created for instance when the child sleeps alone without the parent. This might change if the child sleeps at night beside the parent in the dark.
While behaviorists would look at how having previous negative experiences in the dark influences a child's behavior towards staying in the dark. This fear would be reinforced with more negative experiences in the dark such as having a bad nightmare whenever the child sleeps in the dark, a feeling of hearing, or seeing strange things while in the dark. These examples would have built a behavioral pattern where the child would be conditioned to respond fearfully to being in the dark.
Stored energy and the energy of position is the definition?
Answer:
Potential energy is energy that is stored-or conserved-in an object or substance. This stored energy is based on the position, arrangement or state of the object or substance
Si está probando u motor para un nuevo modelo de coche ; este es capaz de pasar de 0 a 100 km/h en 7,5 segundos . Si el coche tiene una masa de 550 kg cuál será la fuerza que realiza el motor ?
Answer:
La fuerza que realiza el motor es 2035 N.
Explanation:
Podemos encontrar la fuerza del motor usando la siguiente ecuación:
[tex] F = ma [/tex] (1)
En donde:
m: es la masa del coche = 550 kg
a: es la aceleración
Se puede calcular la aceleración mediante la siguiente ecuación cinemática:
[tex] v_{f} = v_{0} + at [/tex] (2)
En donde:
[tex] v_{f}[/tex]: es la velocidad final del coche = 100 km/h
[tex] v_{0} [/tex]: es la velocidad inicial del coche = 0
t: es el tiempo = 7,5 s
Resolviendo la ecuación (2) para "a" tenemos:
[tex] a = \frac{v_{f} - v_{0}}{t} = \frac{100\frac{km}{h}*\frac{1000 m}{1 km}*\frac{1 h}{3600 s} - 0}{7,5 s} = 3,70 m/s^{2} [/tex]
Entonces, la fuerza es:
[tex] F = ma = 550 kg*3,70 m/s^{2} = 2035 N [/tex]
Por lo tanto, la fuerza que realiza el motor es 2035 N.
Espero que te sea de utilidad!
state two environmental problems caused by coal fired power stations
Answer:
Air pollution and water pollution.
Explanation:
The burning of coal causes air pollution, and coal fired power stations dump waste in large bodies of water.
The Playground
A and G are at same height and where
skateboarder starts
E
A
G
ao oon
E
С
vai
OOHO
F
D
O meters
List in order from greatest to least the Kinetic energy from greatest to least.
Drag the boxes in the correct order
1
1
DDDDDD
EASY BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 100pts-
(if you put links or don't answer accordingly im reporting your account)
Answer:
I think the awnser is B (but don't qoute me on that) if its right then yay but if its wrong im sorry
Explanation:
Answer:
Solution given:
frequency[f]=x
velocity[V]=15000m/s
wave length=59m
we have
wave length=[tex] \frac{V}{f} [/tex]
59m=[tex] \frac{15000}{x} [/tex]
x=[tex] \frac{15000}{59} [/tex]=254.Hz
B.254 hz
A car was traveling at a certain speed. It then accelerates for 5.0 s with an acceleration of 1.6 m/s2, and reaches a speed of 20 m/s. What was its initial speed?
I will give u a brainest
Answer:
12m/s
Explanation:
To find the initial speed of the car, we need to find the how much it accelerated/increased in speed and then subtract it from its final speed.
We can do this by using the equation: [tex]a=\frac{\Delta v}{t}[/tex]
Which we can rearrange to find change in velocity: [tex]\Delta v=at[/tex]
The given acceleration is 1.6m/s^2, and the time is 5s. Therefore the car's change in speed was [tex]\Delta v = (1.6)(5)\\\Delta v = 8m/s[/tex]
Since the final speed was 20m/s, we can now simply subtract the change in speed to find the initial speed:
20 - 8 = 12
The initial speed of the car was 12m/s.
Hope this helped!
help please physics !!
Answer:
Option A. 1 bar = 1 atm
Explanation:
Pressure has various units of measurement. Each unit of measurement can be converted to other units of measurement. For example:
1 atm = 1 bar
1 atm = 760 mmHg
1 atm = 760 torr
1 atm = 1×10⁵ N/m²
1 atm = 1×10⁵ Pa
With the above conversion scale we can convert from one unit to the other.
Considering the question given above, it is evident from the coversion scale illustrated above that only option A is correct.
Thus,
1 bar = 1 atm
I need help with this assignment please
Answer:
ill try
Explanation:
let me find this answer for you
Explain how interactions can both benefical and harmful to the organisms in an community
Please, I need to finish my homework.
An object is to the left of a convex mirror. Describe the two rays needed to indicate the location and height of the image. Additionally, state what side of the mirror the image is on and whether it is real or virtual.
Answer:
mark me as the brainly plss
Which factor(s) affect(s) the brightness of a star as seen from earth?
A) the stars distance from earth
B) the stars temperature
C) the stars mass
D) the earths atmospheric conditions
E) all of the above
Answer:
mehoy noy
Explanation:
Indicar objetosque puedan ser observados a simple vista, con microscopio, con microscopio electrico y con miscroscopio de transmicion. Indicar cuel es orden de magnitud de cada uno
Answer:
En esta respuesta voy a usar la unidad μm, tal que:
1 μm = 1*10^(-9) m
Objetos que pueden ser observados a simple vista:
Son todos aquellos objetos que podemos observar simplemente con nuestros ojos, con ellos podemos observar desde un edificio (con tamaños de decenas de metros) hasta algunos cabellos, que pueden tener un diámetro de 0.1 mm
Cosas más pequeñas que estás muy difícilmente se pueden ver a simple vista.
Con un microscopio podremos ver cosas del tamaño de una célula, como glóbulos blancos, rojos, algunos microorganismos, etc, los cuales rondan un tamaño de unos 10 μm. Naturalmente, distintos microscopios tendrán distintas amplificaciones (por lo que con algunos podremos ver objetos muy pequeños que con otros no).
Microscopio eléctrico:
Este microscopio usa electrones en lugar de luz para formar imágenes.
Con él podremos observar cosas como las componentes de una célula (membranas, orgánulos grandes, etc), los cuales pueden medir unos pocos nanómetros (por ejemplo, una membrana celular tendrá un tamaño de entre 5 μm y 10 μm)
Microscopio de transmisión.
Tener en cuenta que el microscopio de transmisión es un microscopio eléctrico, el cual lanza un haz de electrones al objeto que se desea observar, de tal forma que algunos de estos electrones rebotan formando así la imagen virtual amplificada que podemos observar.
Con estos aparatos podemos ver orgánulos pequeños (0.5 μm), y lo más pequeño que podemos ver (con los microscopios más potentes) son columnas de átomos (0.1 μm)
1 Newton = 1,,,,,,,,
Answer:
kg*m/2
Explanation:
hope this helps just did it
Answer:
c
Explanation:
6. Why do telescopes have to have a good motorized drive system to move them quickly and smoothly? a. because the Earth is rotating, with the telescope attached to it b. because astronomers typically have to look at many objects in the sky in a few minutes c. because all objects in the sky vary in brightness very quickly d. because the telescope can then be moved out from under the clouds to where it is clear e. You can’t fool me, telescopes never move; they stay in one position all night
Answer: The correct option is A ( because the Earth is rotating, with the telescope attached to it).
Explanation:
A telescope is a device that is used mostly for viewing distant objects. It's an optical instruments as it's made up of lens and curved mirror depending on the type of telescope. The first telescope was invented by Hans Lippershey in 1608. It is used extensively in war,sea and astronomical discoveries.
Parts of a typical telescope includes:
--> the optical system: this is the most important part of a telescope. This determines the optical aperture of the telescope, how bright or how sharp the formed image would be. This can be a lens or a mirror.
--> Eyepiece: this magnifies the image formed.
--> Motorized drive system: these drive system are mounted with the telescope to aid in a quick and smooth movement while detecting, for example, celestial bodies. This part of the telescope is important as the telescope is mounted on the earth surface which rotates about its axis from west to east. Since the drive system is motorized, it can automatically move very smoothly from east to west at exactly the same rate that Earth is rotating from west to east, so it can continue to point at the object being observed.
HELP ME PLEASE WITH MY HOMEWORK ILL GIVE BRAINLIEST
Answer: Mass
Explanation:
If a car is traveling 60 miles per hour, how far will it travel in one hour?
Answer:
60 miles
I hope it's helps you
Answer:
316800 feet or 60 miles per hour
Explanation:
it is already said in the problem 60 miles per hour