Answer:I think the answer is B. The alpha Deacy but not sure
Explanation:
The type of radioactive decay is the mass number of a nucleus reduced by four is known as alpha decay.
What is meant by alpha decay ?Alpha decay is defined as the type of radioactive decay in which the parent nucleus emits an alpha particle.
Here,
In alpha decay, the parent atomic nuclei emits an alpha particle or helium nucleus and as a result the parent nuclei gets transformed into a different atomic nuclei.
The reaction in alpha decay is given by,
zXᵃ → z-₂Yᵃ⁻⁴ + ₂He⁴
From the reaction, it is shown that the new nuclei formed will have a mass number which is decreased by four from that of the parent nuclei. Also, the atomic number of the new atomic nuclei formed is reduced by two.
Thus, in alpha decay, the mass number of the parent nuclei gets reduced by four.
Hence,
The type of radioactive decay is the mass number of a nucleus reduced by four is known as alpha decay.
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The sound wave passes from the sea-water into the air. State what happens to; the speed of the waves
The speed of sound wave in water is much more greater than its speed in air, so when the sound wave passes from sea water to air, then it's speed decreases.
What is the gamma factor for an object moving at 0.5c?
A. 0.866
B. 0.707
C. 1.15
D. 1.41
Answer:1.15
Explanation:
Answer:
C. 1.15
Explanation:
We can calculate the gamma factor for an object moving at 0.5c, using the formula:
γ = 1/√(1 - v^2/c^2)
--------
where v is the velocity of the object and c is the speed of light.
Substituting v = 0.5c, we get:
γ = 1/√(1 - 0.5^2) = 1/√(1 - 0.25) = 1/√0.75 ≈ 1.155
--------
Therefore, the gamma factor for an object moving at 0.5c is approximately 1.155.
PLEASE HELP!!! DUE SOON!!! NO LINKS OR RANDOM WORDS!!
What is a "waxing" moon?
-An increase in the visible part of the moon as the days progress
-A decrease in the visible part of the moon as the days progress
-Another name for full moon
-Another name for new moon
Who and when was mechanical energy discovered? help me please!
Answer:
Explanation:
Thomas Young (1773 − 1829) first introduced the word “energy” to the field of physics in 1800, but the word did not gain popularity. Thomas Young later established the wave nature of light through interference experiments.
Answer:
June 1849 - James Prescott Joule
Explanation:
James Joule is the physicist who discovered the relationship between the loss of mechanical energy and the gain of heat. If an object contains mechanical energy, then it has the ability to do work.
A fisherman sees 7 wave crests go by in 10.0 s. The crests are 2.43 m apart. Find the period of the wave. (Unit = s)
Velocity of the wave is 1.7 m/s
Explanation:
As we know that the frequency of the wave is defined as the number of waves crossing a fixed point per second
So here we will have
Also we know that the distance between two consecutive crest or two consecutive trough is known as wavelength
So here the wavelength of the wave is given as
now we have
The wave period will be 1.42 s.
What is wave period?The time interval, expressed in seconds, separating two waves as they pass throughout a stationary point has been known as the wave period.
What is wave?A pulse seems to be a single disturbance, whereas a wave would be a persistent, repeated interruption of a medium.
Calculation of wave period
The frequency = 7 / 10 = 0.7 Hz
Wave period can be calculated by the formula:
Wave period = 1 / frequency
Put the value of frequency in above equation.
Wave period = 1 / 0.7
Wave period = 1.42 s
Therefore, the wave period will be 1.42 s
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Convert the following into radians 90°, 30°, 45°, 180°
Answer:
90 degress -> radians= π/2
30 degress -> radians= π/6
45 degrees -> radians= π/4
180 degress -> radians= π
Explanation:
To convert degrees to radians, multiply the degree by π/180 and simplify.
Two numbers are in the ratio 8 : 5. If 6 is added to each number, the ratio becomes
3:2.
Let the numbers be 8x and 5x
ATQ,
= 8x + 6/5x + 6 = 3/2
= 2(8x + 6) = 3(5x + 6)
= 16x + 12 = 15x + 18
= 16x - 15x = 18 - 12
= x = 6
Now, the numbers are:
8x = 8 × 6 = 485x = 5 × 6 = 30Erosion and physical weathering is a ________________ force that affects land formation
Answer:
Any choices for the blank?
Which of these statements partly define law?
A) Is about how something behaves in the natural world
B) is a possible answer to a scientific question based on research
C) is a widely excepted explanation that combine several hypothesis
D) involves asking a question and performing investigation
Answer:
D
Explanation:
im guessing here i hope it is correct and good luck
A net force, the magnitude of which is 3800 N, accelerates a 1260-kg vehicle for 10.0 s. The vehicle travels 50.0 m during this time. What power output does this represent? (g=10 m/s^2) *
Answer:
SEE EXPLANATION
Explanation:
[tex]p = \frac{fd}{t} \\ where \: \\p = power \\ f = force \\ d = distance \\ and \: t = time \\ \\ p = \frac{3800 \times 50}{10} \\ p = \frac{190000}{10} \\ p = 19000w[/tex]
What can Lisa do to increase the strength of the electromagnet? She can use a nail with weaker magnetic properties. She can change the direction of the nail. She can increase the number of wire loops. She can reduce the current in the wire.
Answer:She can increase the number of wire loops
Explanation: When the number of loops of wire ( usually around the iron ) increases, the strength of the electromagnet is increased.
According to the equation
B=μ₀ N I
Where
μ₀ = permeability of the core
N= Number of turns of the coil
I= Current flowing through the coil
From the equation above , we can see that The strength of an electromagnet depends the amount of current, no of turns of coil and the permeability core of coil. we can now say that Increasing the number of wire loops increases the strength of electromagnet.
Therefore, Lisa should increase the number of wire loops to increase the strength of the electromagnet
Answer:
C
Explanation:
Edge2021
20 points and brainlist!!!
Write about a situation where it might be more useful to describe motion using velocity instead of speed.
Answer:
If you are going someplace, you might want to tell which way you were going and how fast for traffic.
Explanation:
Which of the following is commonly used to measure distances in space?
Kilometers
The speed of light
Megameters
The speed of sound
Answer:
Light years or the speed of light
Explanation:
Answer:
speed of light
Explanation:
The duration between the emission of the sound from the echo reception is: t - 1.5 s. the distance between the observer and the sound receiver knowing that the speed of sound in the air is worth
V - 340 m/s is:
Answer:
. tt tt t t t t t t tt t tt t t jk j k j k j k j k jk k j k jk
PLEASE HELP! An object is placed at a distance of 18.0 cm to the left of a thin converging lens of focal length -10.0 cm. Where does the image form
Answer: 6.4
Explanation:
Si la rapidez lineal de un móvil que se desplaza con MCU se triplica y el radio se mantiene constante, entonces la fuerza centrípeta:
Answer:
F' = 9 F
Explanation:
The question says that, "If the linear speed of a mobile moving with MCU is tripled and the radius remains constant, then the centripetal force:"
The formula for the centripetal force is given by :
[tex]F=\dfrac{mv^2}r{}[/tex]
Where
m is the mass of the object
v is the velocity
r is the radius of path
If the linear speed us tripled, v' = 2v, r = constant, then the new centripetal force is given by :
[tex]F'=\dfrac{mv'^2}r{}\\\\F'=\dfrac{m(3v)^2}{r}\\\\=\dfrac{mv^2}{r}\times 9\\\\F'=9F[/tex]
So, the new force becomes 9 times of the initial force.
Is bio, chem, or physics better?
a pennyfarthing is a style of a bicycle with a very large front wheel and a small real wheel, the cyclist who sit high above and behind the front wheel pedals this wheel directly the distance the pedals are turned input distance in one rotation is about 0.64 m. if the mechanical advantage of the pennyfarthing is 0.16 how far does the large wheel turn in one rotation.
Answer:
In one rotation, the large wheel turns 4m.
Explanation:
The given values are:
Input distance,
= 0.64 m
Mechanical advantage,
= 0.16
As we know,
⇒ [tex]Out. \ Distance = \frac{Inp. \ distance}{Mechanical \ advantage}[/tex]
On putting the values, we get
⇒ [tex]=\frac{0.64}{0.16}[/tex]
⇒ [tex]=4 \ m[/tex]
i am having trouble with writing a 2 paragraph summary about this vidio can someone help me
Picture of the Big Bang (a.k.a. Oldest Light in the Universe)
Answer:
where is the video?
Explanation:
A pendulum is in a spacecraft to measure
acceleration during lift off. Before the launch, its period
is 6.5 X 10-3 s. At a point during lift off, its period is 3.1
X 10-3 s. What is the acceleration at this point?
Answer:
For small angles (✓ < 30 degrees), the period of a simple pendulum4can be approximated by: 3A radian is an angle measure based upon the circumference of a circle C =2⇡r where r is the radius of the circle. A complete circle (360 ) is said to have 2⇡ radians. Therefore, a 1/4 circle (90 )is⇡/2 radians.
Explanation:
This object is located 13.0 cm to the left of the lens and the image forms at 20.8 cm to the right of the lens.
What is the focal length of the lens?
Answer:
0.125 cm
Explanation:
1/f = 1/d¡ + 1/d。
Find the focal point
(13.0^-1 + 20.8^-1) = 0.125 m
Focal point = 0.125 m
The object placed in front of mirror forms an image on the opposite side of the mirror. The focal length of the lens is 0.125 m.
What is focal length?Focal length is the distance between the lens and the image sensor when the object is in focus.
The focal length can be find out by using lens maker formula.
1/f = 1/d¡ + 1/d。
1 / 13.0 + 1 / 20.8
f = 0.125 m
Thus, the focal length of the lens is 0.125 m.
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Identify the vibrating media in three different
types of musical instruments.
Explanation:
Hole. Hole. Different notes can be played on the flute by blocking holes. ...
Drum skin. Drum skin. Hitting the bongo drum makes its tight elastic skin vibrate.
String. String. ...
Sound. hole. ...
Bow. Bow.
You step onto a hot beach with your bare feet. A generated in your foot, travels through your nervous system at an average speed of 127 m/s. How much time does it take for the impulse, which travels a distance of 1.58m to reach your brain?
Answer: 12.44 millisecond
Explanation:
Based on the information given, to know the time taken for the impulse, which travels a distance of 1.58m to reach the brain will be:
Time taken = Distance/Speed
Time taken = 1.58/127
Time taken = 0.01244
Time taken = 12.44 millisecond.
what type of galaxy Andromeda is??
Answer:
a spiral
Explanation:
It's the largest member of the Local Group of galaxies
Answer:
Barred spiral galaxy
The weight of a football player is 680 N. What is his mass? g = 9.8 m/s2
Answer:
69.39 kgExplanation:
The mass of the football player can be found by using the formula
[tex]m = \frac{w}{a} \\ [/tex]
w is the weight
a is the acceleration due to gravity
From the question we have
[tex]m = \frac{680}{9.8} \\ = 69.38775...[/tex]
We have the final answer as
69.39 kgHope this helps you
Answer:
(a) What is her weight on earth? (b) What are her mass and her weight on the moon, where g = 1.62 ms–2? Solution: (a) On earth. W = m g = 55.0 x 9.8 = 539 N.
Explanation:
im not sure
What happens to the force of gravity between two masses if one mass is decreased?
A. It stays the same.
B.it fluctuates.
C. It increases.
D. It decreases.
Answer:
D. It decreases
Explanation:
what equation can be used to calculate either wavelength, frequency or speed?
Answer:
speed = wavelength * frequency
Explanation:
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Describe the movement of molecules in an ice cube at the temperatures shown, and indicate whether the ice cube will change state.
Answer: The ice molecules expand and become stuck since the water is frozen and start to vibrate
Explanation:
According to the concept of thermal energy, as the temperature rises thermal energy increases and molecules start vibrating faster and ice changes it's state to water that is from solid to liquid.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system and is responsible for rise in temperature.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance containing molecules or atoms are vibrating faster.
These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the number of collision of particles , higher is the thermal energy.
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What do scientists know about the future of the universe?
what dark matter is made of
why the expansion of the universe is accelerating
that stars will eventually burn out causing the universe to become cold and dark
that galaxies spin much slower than they should based on visible matter
Answer:
Gravity will cause a closed universe to collapse back on itself ending in the Big Crunch. scientific predictions about the future of the universe are based on the idea that the effect of gravity on matter determines the shape of the universe which then determines its future
Scientists know about the future of the universe and that stars will eventually burn out causing the universe to become cold and dark. Therefore, option C is correct.
What is the future of the universe?All of the stars and galaxies will ultimately run out of energy as the universe expands, and the universe will cool down, resulting in the "Big Chill." It will take an indefinite amount of time for gravity to stop the universe's expansion if its density is equal to the critical density.
There won't be any other galaxies visible outside of our own. The universe will then actually become cold, dark, and empty once the stars have burned out.
Scientists know about the future of the universe and that stars will eventually burn out causing the universe to become cold and dark. Therefore, option C is correct.
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how are the process of melting and freezing similar?
a. they are both processes where heat is released by a substance.
b. they are both processes that physically change a substance.
c. they are both processes that chemically change substance
d. they are both pressure where heat is absorbed by a substance.