Answer:
The answer is electrons.
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
The rubber ducky has a mass of 5 grams and a volume of 75 mL. How much water does he displace?
5 grams or 75 mL
Answer:
Volume displaced by ducky = 75 mL = 7.5 x 10⁻⁵ m³
Mass displaced by the ducky = 7.5 x 10⁻² kg = 75 grams
Explanation:
The ducky will displace the volume of the water equal to its own volume.
Volume displaced by ducky = 75 mL = 7.5 x 10⁻⁵ m³
And the mass displaced by ducky will be equal to:
Mass displaced by the ducky = (Density of Water)(Volume displaced by ducky)
Mass displaced by the ducky = (1000 kg/m³)(7.5 x 10⁻⁵ m³)
Mass displaced by the ducky = 7.5 x 10⁻² kg = 75 grams
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. :-)
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.
2. A mass-spring system oscillates with a frequency of 20 Hz. What is the period?
Answer:
0.05s
Explanation:
f=20Hz
we know,
time period=t=1/f
t=1/20
=0.05s
Zone between each team's blue line and goal line in ice hocky
Answer:Each goal line is 11 feet (3.4 m) from the end boards. NHL blue lines are 75 feet (22.9 m) from the end boards and 50 feet (15.2 m) apart.
Explanation:When the other team is on the attack, the defensive zone is the area between your goal line and your blue line. The central ice area between the two blue lines (neither the defending nor the attacking zone). When the your team is on the attack, the offensive zone is the area between blue line and your opponents goal.
¿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 :)
I really need help with this! It is my last assignment of the year!! I will reward whatever I can give for a correct answer!!!!
Answer:
Explanation:
The half-life of Cs-137 is 30.2 years. If the initial mass of the sample is 1.00 kg, how much will remain after 151 years?
A. There will be 2.000 kg left after 151 years,
B. There will be 0.031 kg left after 151 years,
C. There will be 0.500 kg left after 151 years.
D. There will be 0.062 kg left after 151 years,
Answer: Its B. There will be 0.031 kg left after 151 years,
Explanation: Im doing my assessment right now.
The half-life of Cs-137 is 30.2 years. If the initial mass of the sample is 1.00 kg, the mass remain after 151 years is 0.031 Kg.
What is Cs-137?Caesium-137, or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes.
Cs-137 is used in medical radiation therapy devices for treating cancer.
What is half-life?The half-life is the amount of time it takes for a given sample to lose half of the original amount or the time for radioactive substance to decay. The half-life of Cs-137 is 30.2 years.
What is decay constant?Decay constant of radioactive substance is its probability of decay per unit time.
In this case,
Mass of sample is 1 Kg
Half-life of Cs-137 is 30.2 years
The elapsed time is 30.2 years.
This means, one half-life is elapsed, the half of sample will decay in 30.2 years. Therefore, the half of the original substance will remain in 30.2 years which is 0.500 Kg. After another 30.2 years, it will be 0.250 Kg. And after 151 years, it will be 0.031 Kg.
To learn more about Cs-137 here
https://brainly.com/question/7004414
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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:
a bike accelerates at 2m/s2 down the street when a force of 12 newtons is applied to it. what is the mass of the bike
Answer:
6 kilograms
Explanation:
force (N) = mass (kg) × acceleration (m/s²). an object of constant mass accelerates in proportion to the force applied. If the same force is applied to two objects of different mass, the heavier object has less acceleration than the lighter object. Divide the newtons by the rate of acceleration, which will give you the mass of the object. The mass will be in kilograms, because a single newton represents the amount of force needed to move one kilogram one meter.
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 ,,,
an object travels 16m in 4sec and then another 16m in 2sec. what is the average speed of the object?
Answer:
Explanation:
Average Speed = Total Distance / Total Time
5.3 m/s
Equation
Total distance = d1 + d2
Total Time = t1 + t2
Givens
Total Distance = 16 + 16
Total Distance = 32
Total Time = t2 + t1
Total Time = 2 sec + 4sec
Total Time = 6 sec
Solution
Average Speed = Total Distance / Total Time
Average Speed = 32 / 6
Average Speed = 5.33 m/s
What is the white part of a hurricane forecast called?
*The category is the closest I could get
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
When vectors are added or subtracted, the net force is called the____.
Sum
Solution
Resultant
Vector quantity
Answer:
When vectors are added or subtracted, the net force is called the resultant force.
Explanation:
Hope i helped, have a nice day/night
ways by which static electric current can be produced
Answer:.....................
solar panels
A hollow Spherical conductor of radius 12 cm is
charged to 6x10^-6 c. Find the electric field
Strength at the surface of sphere inside the sphere
at 8 cm and at distance 15m from the sphere.
Answer:
Explanation:
Radius of the charged sphere (R)=12cm
Charge (q)=6∗10^−6C
Electric field intensity (E)=?
i) On the surface
[tex]E=\frac{1}{4\pix_{e0} } \frac{q}{R^2} =9*10^{9} *\frac{6*10^{-6} }{0.12^-2} =3.75*10^6 N/C[/tex]
ii) Inside the sphere,
E=0; Because charge enclosed by Gaussian surface is zero.
iii) Outside the sphere at distance 15cm
i.e. r=12+15=27cm=0.27m
[tex]E=\frac{1}{4\pi _{e} }_{0} \frac{q}{r^{2} } =9*10^9*\frac{6 \a* *10^6}{(0.27)^2} =7.41*10^5 N/C[/tex]
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
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
A bullet is fired into the air at an angle of 30° to the horizontal. At the same time and from the same height,
a bullet is dropped. If we neglect the effects of air resistance, how will the time the two bullets spend in the
air compare?
Answer:
The bullet that is fired will spend longer in the air, hitting the ground after the dropped bullet.
Explanation:
Using the equation: x = x 0 + v t
If we neglect the effects of air resistance, the horizontal motion is a constant velocity.
The horizontal displacement = (velocity X cosθ)
So, the fired bullet has to travel horizontally before falling which takes a longer time compared to a bullet dropped where it is, height = 1/2 gt^2
gravity, g = 9.8 m/s2.
The time spent in air for the bullet projected at angle depends on the initial velocity of the bullet and angle of projection while bullet dropped from the same height depends on the final velocity of the bullet which depends on the height from the which the bullet was
The given parameters;
angle of the projection, θ = 30⁰The time taken for the bullet fired at angle to return to the ground level is calculated as;
[tex]T = \frac{2 \times usin(30)}{g} \\\\T = \frac{u}{g}[/tex]
where;
u is the initial velocity of the bulletThe time taken for bullet dropped from the same height to reach the ground is calculated as;
[tex]v_f = v_0 + gt\\\\t = \frac{v_f - v_0}{g} \\\\t = \frac{v_f}{g}[/tex]
where
[tex]v_f[/tex] is the final velocity of the bulletThus, we can conclude that the time spent in air for the bullet projected at angle depends on the initial velocity of the bullet and angle of projection while bullet dropped from the same height depends on the final velocity of the bullet which depends on the height from the which the bullet was dropped.
Learn more here:https://brainly.com/question/2018532
What is the primary cause of earthquakes?
Answer:
Tectonic movement is the primary cause of earthquake.
what does the second law of throdynamics state?
A. The amount of molecular disorder in the universe will always increase
B. The amount of molecular disorder in the universe will always decrease
C. The amount of molecular disorder in the universe will stay constant.
Answer:
A.The second law of thermodynamics states that the total entropy of a system either increases or remains constant in any spontaneous process; it never decreases. ... This is because entropy increases for heat transfer of energy from hot to cold (Figure 12.9).
Explanation:
Hope It Helps
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:
calculate the pressure exerted by a force of 42N on a surface of 3m length and 2m bredth.[will be marking brainliest and following right answer..]
Answer:
Pressure, P = 7 Pa
Explanation:
Given that,
Force exerted on the surface, F = 42 N
Length, l = 3 m
Width, b = 2 m
We need to find the pressure exerted by this force. We know that, pressure is equal to force per unit area. So,
[tex]P=\dfrac{F}{l\times b}\\\\P=\dfrac{42}{3\times 2}\\\\P=7\ Pa[/tex]
So, the required pressure is equal to 7 Pa.
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.
Can some one help me with this question its hard :( down below ill give brainliest
Answer: B
Explanation:
How white light interacts with a blue book and a blue stained glass window.
Answer:
A blue book absorbs the light and creates the color blue. It is opaque. A blue stained glass window lets light pass through and absorbs some light. It is translucent.
Explanation:
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?
Does anyone knows the answer??
Answer:
yaa
Explanation:
Explanation:
: magnitude, direction : least : linear velocity or velocity : velocity : magnitudei am sooo sorry it will take a lot of time if I copy the sentences,. all answers are correct.
hope this helps you to.