Answer:
3.36 Joules
Explanation:
Work done= Force × distance
F=4.2 N
distance= 0.8 m
work done= 4.2 × 0.8
work done= 3.36 Joules
Multiple Choice
Which of the following is not an example of malicious code?
A Trojan horse
B worm
C virus
D. spy gear
Answer:
D
Explanation:
Spy gear is different from Spyware.
What is the best description of the destructive interference of light?
A. The crest of one wave overlaps with the trough of another.
B. The crests of two waves intersect.
C. A longitudinal wave meets a transverse light wave.
D. A mechanical wave meets an electromagnetic wave.
Answer: The crest of one wave overlaps with the trough of another
Explanation:
I took the test and got 100%. This is the correct answer
The best description of the destructive interference of light is the crest of one wave overlaps with the trough of another.
What is destructive interference of light?Destructive interference takes place when waves come together in such a manner that they completely cancel each other out or amplitude of the resulting wave decreased.
What is crest and trough?The highest surface part of a wave is called the crest, and the lowest part is the trough.
To learn more about Destructive interference here
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¿Qué es la carga eléctrica de un cuerpo?
Answer:
Las células del interior son negativas, mientras que en el exterior son positivas.
Explanation:
Que tenga un buen día :)
1
Why would you advice a person to sit rather than stand in a moving bus?
Answer:
Standing in a moving bus may lead the person fall when the driver will apply brake.
Explanation:
According to Newton's third law of motion, there is an equal and opposite reaction to every action. When the bus is moving, the person standing is in the state of rest. The moment the driver applies brake, the bus stops. The stopping of the bus makes the person in the stationary position change in motion. Because of this force, the person may fall and collide if he is standing instead of sitting in the moving bus.
has anyone done the science project: modeling waves/properties of light?
could you show me the format you used?
For this assignment, you will develop several models that show how light waves and mechanical waves are reflected, absorbed, or transmitted through various materials. For each model, you will write a brief description of the interaction between the wave and the material. You will also compose two typewritten paragraphs. The first will compare and contrast light waves interacting with different materials. The second will explain why materials with certain properties are well suited for particular functions.
Background InformationA wave is any disturbance that carries energy from one place to another. There are two different types of waves: mechanical and electromagnetic. A mechanical wave carries energy through matter. Energy is transferred through vibrating particles of matter. Examples of mechanical waves include ocean waves, sound waves, and seismic waves. Like a mechanical wave, an electromagnetic wave can also carry energy through matter. However, unlike a mechanical wave, an electromagnetic wave does not need particles of matter to carry energy. Examples of electromagnetic waves include microwaves, visible light, X-rays, and radiation from the Sun.
Answer:
Here the other guy is right I’m answering so he can be marked brainliest
Explanation:
HELPPPP I HAVE A TEST TODAY AND I LITERALLY CAN'T WITH THIS
In a children’s soccer game, one of the children kicks the ball from the ground, giving it an initial velocity of 22 m/s at an angle of 62° to the horizontal. Determine the initial vertical and horizontal velocity components.
If you post links I will report u so I suggest u don't
The horizontal component of velocity is
(22 m/s) • cosine(62°).
The vertical component of velocity is
(22 m/s) • sine(62°).
These are the original components, right after the kick. As time goes on, the horizontal one doesn't change. But the vertical one gets bigger and bigger, because gravity is accelerating the ball downward.
That's the complete story of projectile motion.
A 0.10 kg mass is oscillating on Planet X at a small angle from a light string of length 0.20 m with a period of
0.63 s.
What is the acceleration of gravity on Planet X?
Answer:
the acceleration of gravity on Planet X is 19.89 m/s^2
Explanation:
The computation of the acceleration of gravity on Planet X is shown below:
T = 2π√l ÷ √g
g = l ÷ (T÷ 2π)^2
= 4π^2l ÷ T^2
= 4π^2× 0.2 ÷ 0.63^2
= 19.89 m/s^2
Hence, the acceleration of gravity on Planet X is 19.89 m/s^2
In this way it should be calculated
The same would be relevant and cosnidered
Un tubo cilíndrico de acero tiene 2.4 cm3 de volumen a -20°C. ¿Cuál será su volumen con una temperatura final de 47C ? Y ¿ Cuál es su variación?
i searched this in googl.e, and there was one website, so i clicked it, and umm it was very disgusting ,,,
Extremely large main sequence stars consume their fuel quickly and burn hot and bright. As they consume all their hydrogen, they become supergiants. Describe the changes that take place, in terms of luminosity and temperature, to these large main sequence stars as they exhaust their hydrogen supplies.
Answer: Their temperature decreases dramatically, but their luminosity increases only slightly.
Explanation: Edmentum answer
Use the drop-down menu to answer the question. To increase the amount of current flowing in a circuit, how should you change the voltage if the resistance stays the same?
Answer: increase the voltage
Explanation:
Answer:
increase the voltage
Explanation:
Please help
asappppppp
Answer:
16.2m/s
Explanation:
Kinetic energy=1/2mass*speed squared
KE=1/2mv^2
Data,
KE=85J
M=0.65kg
V=?
85J=1/2(0.65kg)V^2
Cross multiply
2 *85=0.65V^2
Divide both sides by 0.65
170/0.65=v^2
V=✓(170/0.65)
V= 16.172m/s
First option is collect
An automatic switch that opens when the current reaches a set value is called:
a. surge suppressor
C. circuit breaker
b. relay
d. fuse
Please select the best answer from the choices provided
13. Situasi yang manakah menunjukkan momentum tidak terabadi?
Answer:
gtsidtuye5udme5ir66eisthfetewjey
Explanation:
•diamond is a great place to start and I am not sure if I can you to dear friend of the day I am not a member of thejtearhaarymrue but I think you should have all of your ideas to be a good choice if you welcome mam and happiness of the people you are not j or your own children like sw or your own children or the family and happiness of the past year and happiness and love chocolate and I love chocolate too but you are a great person to be with example of the same
Answer:
what's languae it's that?
A 50.0 g golf ball is struck by a driver whose head has a mass of 500.0 kg. The final speed of the golf ball after leaving the tee is 45.0 m/s. Find the final momentum of the golf ball.
A)2.5 kg·m/s
B)5.0 kg·m/s
C)7.5 kg·m/s
D)10.0 kg·m/s
this is my answer sure po ako n tama iyan
A spring stretches 2 cm when a 10 N weight hangs on it. How far will it stretch with a weight of 20 N ?
Answer:
4cm
Explanation:
If it's a simple ratio 2cm:10N to ?cm:20N, It should be 4cm:20N.
a solenoid has 364 coils. the flux through each changes from 2.57*10^-5 Wb to 9.44*10^-5 Wb in 0.0154s. how much EMF is generated?
Answer:
1.62
Explanation:
comment section (credits to charlizebarth)+ correct on acellus
EMF induced in coil is directly proportional to the rate of change of magnetic flux by the flowing current with n number of turns in it.The total emf generated is 1.62 volts
Given-
Total coils in a solenoid [tex]N[/tex] is 365 coils.
The change in flux is,
[tex]d\phi=9.44\times10^{-5} -2.57\times 10^{-5}[/tex]
[tex]d\phi=6.87\times10^{-5}[/tex]
The change in time [tex]dt[/tex] is 0.0154 sec.
According to Faraday's law the EMF induced in coil is directly proportional to the rate of change of magnetic flux produced in the coil by the current i flowing in it with conductor having a finite number of turns in it.This can be given as,
[tex]emf=-N\dfrac{d\phi }{dt}[/tex]
[tex]emf=-364\times \dfrac{6.87\times 10^{-5}}{0.0154}[/tex]
[tex]emf= -1.62[/tex]
Hence, the total emf generated is 1.62 volts.
For more about the EMF, follow the link below-
https://brainly.com/question/118936
Over what period of time will be birr 500 amount to birr 900 at the rate of 8% simple interest?
The time taken is 10 years.
What is simple interest?The term simple interest is an interest that is charged only on the principal and not on the interest.
We have the following;
Principal = 500 birr
amount = 900 birr
rate = 8%
Interest = 900 birr - 500 birr = 400 birr
400 = 500 × 8 × T/100
400 × 100 = 500 × 8 × T
T = 400 × 100/500 × 8
T = 10 years
Learn more about simple interest:https://brainly.com/question/2793278
Answer:
10 years
Explanation:
To solve this first we have to find the simple interest.
Let us find it now.
Interest = birr 900 - birr 500
= birr 400
Now we are having,
Amount = birr 900
Principal = birr 500
Interest = birr 400
rate = 8%
Period of time = ?
Let us use the formula to find the period of time.
Simple interest = Principal × Rate × Time ÷ 100
birr 400 = birr 500 × 8 × t ÷ 100
birr 400 × 100 = 4000t
40000 = 4000t
Divide both sides by 4000.
10 = t
Therefore, the time is 10 years.
Let me know if you have any other questions. :-)
VAMDNVABNATNAMDTEMCYSPLDDNHNMQTYY
que es bandaaa
Give one example of friction making something stay still ?
Answer:
when you kick a football it stops after sometime this is because of fiction force
Explanation:
what would happen to our vision if the lens of our eyes were concave? defend your answer NO LINKS!!!
If the lens of our eyes were concave, we would not be able to see. We would be blind. This is because our eyes form a visual image on the same side of the lens at the object being viewed. Thus, a concave lens would result in the visual image focusing in front of the eye, not the retina inside the eye. This would mean that no signals would be sent to the brain, and vision would not be possible.
A laptop computer adapter has a voltage of 19 v it has a resistance of 4.0 Ω and the adapter gets warm when operating. So determine the current going through the adapter
Answer:
Current, I = 4.75 Amps
Explanation:
Given the following data;
Voltage = 19 V
Resistance = 4 Ohms
To find the current;
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
Making current (I) the subject of formula, we have;
[tex] I = \frac {V}{R} [/tex]
Substituting into the formula, we have;
[tex] I = \frac {19}{4} [/tex]
Current, I = 4.75 Amps
ways by which static electric current can be produced
Answer:.....................
solar panels
factors effecting time period of shm
Answer:
In fact, the mass m and the force constant k are the only factors that affect the period and frequency of simple harmonic motion.
A record player has a velocity of 33.33 RPM. How fast is the record spinning in m/s at a distance of 0.085 m from the center?
Answer:
0.297 m/s
Explanation:
It is 0.297 m/s. The study of rotational motion in the absence of forces is known as angular kinematics.
What is angular velocity?The angular velocity of an object is the rate at which it rotates or revolves around an axis in time. The Greek letter omega (, sometimes ) represents angular velocity. The SI unit of angular velocity is radians per second because it is measured in angle per unit time. Angular velocity (w) is a vector quantity in uniform circular motion and equals angular displacement (, a vector quantity) divided by time change (t). The arc length travelled (S) divided by the change in time (t) equals speed, which is also equal to |w|R. An example of angular velocity is a roulette ball on a roulette wheel, a race car on a circular path, and a Ferris wheel.To learn more about Angular Kinematics refer to:
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please help i'm going to throw up from stress
Water at 20.0 °C is mixed with 120.0 g of ethyl alcohol at 10.0 °C in a thermally insulated container. If the final mixture has a temperature of 16.0 °C, how much water was added?
No links istg
Answer:
Explanation:
First of all, I used the specific heat of water as 4182 J/(kgC) and the specific heat of ethyl alcohol (EtOH) as 2440 J/(kgC); that means that we need the masses in kg, not g.
120.g = .1200 kg of ethyl alcohol. Now for the formula:
[tex]t_f=\frac{(m_{H2O}*spheat_{H2O}*temp_{H2O})+(m_{EtOH}*spheat_{EtOH}*temp_{EtOH})}{(m_{H2O}*spheat_{H2O})+(m_{EtOH}*spheat_{EtOH})}[/tex] where spheat is specific heat.
Filling that horrifying-looking formula in with some values:
[tex]16.0=\frac{(x*4182*20.0)+(.1200*2440*10.0)}{(x*4182)+(.1200*2440)}[/tex] and
[tex]16.0=\frac{83640x+2928}{4182x+292.8}[/tex] and
16(4182x + 292.8) = 83640x + 2928 and
66912x + 4684.8 = 83640x + 2928 and
1756.8 = 16728x so
x = .105 kg and the amount of water added is 105 g
PLEASE HELP URGENT!!! A 20.0 cm tall object is placed 50.0 cm in front of a convex mirror with a radius of curvature of 34.0 cm. Where will the image be located, and how tall will it be? Please show all work using the following steps...
Step 1: Find the focal length, step 2: find the image distance using the mirror equation step 3: Use the magnification relationship to find the image height.
Explanation:
1. f = r/2 = 34.0/2 = 17.0 cm
2. 1/s'= -1/f - 1/s
= -1/17 - 1/50
= (-50-17) /850
= (-67) /850
s' = 850/(-67) = - 12.69 cm
3. M = |s'/s| = |-12.69/50| = 0.25
h' = 0.25×20 = 4 cm
An echo is not heard in a small room.why ? give reason
Answer:
They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.
hopw it helps
What is the speed of a wave with a frequency of 100 hz and a wave length of .5 m?
Answer:
Explanation:
There are 2 ways to help with this. Explain the details, which are fairly simple in this topic, or give the formula. My hope is that an explanation will last longer than memorizing the formula. I give you both.
If a wave has frequency, f, of 3 Hz, its period, T, is
1
3
s
. The wavelength,
λ
, is 5 meters. That means that in the time of one period, the wave travels 5 m.
In general,
S
p
e
e
d
=
distance
time
In applying this general definition of speed
↑
to a wave, we have
speed of the wave
=
wavelength
period
Note: we generally use v for speed of a wave. Using the variable names, then that last formula is written
v
=
λ
T
Since
T
=
1
f
, we can also say that
v
=
λ
⋅
f
So, using that last formula
v
=
5
m
⋅
3
H
z
=
15
m
s
Note: the unit Hz is equivalent to what it was called 100 years ago,
cycles
second
(
also cps
)
. Cycles is not a true unit, so the Hz contributed only the "per second" to the result
15
m
s
.
Answer: the speed is =30ms^-1 The speed of a wave is given by "speed" (ms^-1)= "frequency(Hz)" xx "wavelength (m)" The frequency is f=100Hz The wavelength is lambda=0.3m The speed is v=lambdaf=0.3*100=30ms^-1
Explanation:
Superman's laser eyes have a wavelength of 6.4*10^-12, how much energy do those eyes release?
quite a lot :0
I hope this helps, and keep some kryptonite on hand dude!
Can some one help me with this question its hard :( down below ill give brainliest
Answer: B
Explanation: