Answer:
sound waves need to travel through a medium such as solids,liquids and gases. hoped this helped
Explanation:
sound waves
A book is laying on the floor (in equilibrium). If you were only given the normal force describe how you would go about finding the mass of the book.
Answer
divide by 9.8 or 10
Explanation:
normal force equals to the weight, which is equal to mass* gravitational force
Numa determinada escala X, arbitrária, um termômetro marca 0°X para o ponto de fusão do gelo e 50°X para o ponto de ebulição da água, ao nível do mar. Que temperatura esse termômetro marcaria se fosse mergulhado em um líquido cuja temperatura é de 50°C?
Answer:
the temperature measured by the thermometer is 25 ° X
Explanation:
The computation of the temperature measured by the thermometer is shown below:
Here is the thermometric scale list
(X - 0) ÷ C - 0 = (50 - 0) ÷ (100 - 0)
X ÷ C = 50 ÷100
X = C ÷ 2
Now if there is 50 degrees celcius
So, the x would be
= 50 ÷ 2
= 25 ° X
Hence, the temperature measured by the thermometer is 25 ° X
The same is to be considere d
A space station has a mass M and orbits Earth in a circular orbit at a height above Earth’s surface. An astronaut in the space station appears weightless because the astronaut seems to float. Which of the following claims is true about the force exerted on the astronaut by Earth ?
A) there is no force exerted on the astronaut by Earth because the astronaut is 400km above Earth’s surface
B) the force exerted on the astronaut by Earth is less than the force exerted by the astronaut because the astronaut is 400km above Earths surface
C) the force exerted on the astronaut by Earth is equal to the gravitational force of the space station that is exerted on the astronaut; the two equal forces balance to cause the astronaut to float.
D) the force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut
Please help me with this question if you can ! It would be very much appreciated . Thank you
Answer:
The correct option is;
D) The force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut
Explanation:
According to Newton's third law of motion, in nature, for every action, there is an equal and opposite reaction, such that if a first object exerts a certain amount of force on a second object, the second object will exert a force of equal magnitude and opposite direction to that exerted by the first object
Therefore, the gravitational force exerted by Earth on the astronaut, is equal to the force exerted by the astronaut on Earth.
The claim from the options that is true about the force exerted on the astronaut by Earth is;
Option D; The force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut.
We are told that the astronaut experiences weightlessness in the space station. This is because he is moving around the earth under the influence of earth's gravitational force and is therefore in a state of 'free fall'.Now, the mass of the earth is much more larger than that of any astronaut. From newton's second law of motion, we know that;
Force(F) = Mass * Acceleration
Since the earth does not move but the astronaut moves, it means the force is sufficient to cause an acceleration of the astronaut but not sufficient to move the earth as the earth's mass is too big.Thus, the same force exerted on the astronaut by the earth is same exerted on the earth by the astronaut.
Read more about force of gravity at; https://brainly.com/question/11569146
Why did it take Kepler so long to discover the truth about the motions of the solar system?
Answer:
Look below :) Hope this helped. Please provide Brainliest, as reporters took all I had away. Thanks!
Explanation:
Kepler's family was Lutheran and he adhered to the Augsburg Confession a defining document for Lutheranism. However, he did not adhere to the Lutheran position on the real presence and refused to sign the Formula of Concord. Because of his refusal he was excluded from the sacrament in the Lutheran church. This and his refusal to convert to Catholicism left him alienated by both the Lutherans and the Catholics. Thus he had no refuge during the Thirty-Years War.
The Holy Roman Empire of German Nationality at the Time of Kepler
The Holy Roman Empire of German Nationality at the Time of Kepler.
In 1612 Lutherans were forced out of Prague, so Kepler moved on to Linz. His wife and two sons had recently died. He remarried happily, but had many personal and financial troubles. Two infant daughters died and Kepler had to return to Württemburg where he successfully defended his mother against charges of witchcraft. In 1619 he published Harmonices Mundi, in which he describes his "third law."
In spite of more forced relocations, Kepler published the Epitome Astronomiae in 1621. This was his most influential work and discussed all of heliocentric astronomy in a systematic way. He then went on to produce the Rudolphine Tables that Tycho had envisioned long ago. These included calculations using logarithms, which he developed, and provided perpetual tables for calculating planetary positions for any past or future date. Kepler used the tables to predict a pair of transits by Mercury and Venus of the Sun, although he did not live to witness the events.
Johannes Kepler died in Regensburg in 1630, while on a journey from his home in Sagan to collect a debt. His grave was demolished within two years because of the Thirty Years War. Frail of body, but robust in mind and spirit, Kepler was scrupulously honest to the data.
Short Biography -|- Kepler's Firsts -|- Kepler's Laws -|- People and Events in Kepler's Time -|- Articles
Biographies and books -|- Web Sites -|- IYA Kepler
A List of Kepler's Firsts
First to correctly explain planetary motion, thereby, becoming founder of celestial mechanics and the first "natural laws" in the modern sense; being universal, verifiable, precise.
In his book Astronomia Pars Optica, for which he earned the title of founder of modern optics he was the:
First to investigate the formation of pictures with a pin hole camera;
First to explain the process of vision by refraction within the eye;
First to formulate eyeglass designing for nearsightedness and farsightedness;
First to explain the use of both eyes for depth perception.
Eli and Andy want to find out which of the two is stronger. Eli pushes a table with a force of 120 newtons while Andy pushes the table from the opposite side with a force of 125 newtons. Ignoring the masses of Eli and Andy, what is the resultant acceleration of the table if its mass is 10.0 kilograms?
A.
13.5 meters/second2
B.
0.50 meters/second2
C.
4.0 meters/second2
D.
5.50 meters/second2
E.
1.35 meters/seconds2
Answer:
B. 0.50 meters/second^2
Explanation:
Given:
mass of table (m) = 10.0 kgEli's force (F1) = 120 NAndy's force (F2) = -125 NArranging Formulas and Substituting Values, Part 1:
F = F1 + F2F = 120 + (-125)F = -5 NThe -5 means that the table will move along the direction of the force applied by Andy.Arranging Formulas and Substituting Values, Part 2:
m * a = Fa = F / Ma = -5 / 10.0 kga = -0.5 m/s^2Answer:
B. 0.50 meters/second^2
Explanation:
What are three examples of objects that float in water?
(Please don't copy and paste)
Answer:
anything inflated, a can, and a pencil.
Explanation:
these objects can flaot on water because theyre mass is not enough for the objects to sink.
Weekend A
Assignment
Differentiate between forced and damped oscillation
Answer:
A damped oscillation means an oscillation that fades away with time while Forced oscillations occur when an oscillating system is driven by a periodic force that is external to the oscillating system.
Explanation:
Damping is the reduction in amplitude (energy loss from the system) due to overcomings of external forces like friction or air resistance and other resistive forces. ... When a body oscillates by being influenced by an external periodic force, it is called forced oscillation.
Hope this helpedWelcome
What variables have the most effect on the strength of the gravitational attraction between two massive objects?
Help
Answer:
The distance between the 2 centers of the object.
Explanation:
If it's harder to win a super bowl for the rams than the gravity means the chiefs will win it.
Un auto parte desde un lugar a las 6:00 de la mañana con una rapidez de 150 Km/hr a través de una carretera recta. a) ¿Qué distancia habrá recorrido a las 10:00 de la mañana? b) ¿A qué hora habrá recorrido 900 Km?
Answer:
600 km
6 hours
Explanation:
El tiempo que viaja el automóvil de 6 a 10 de la mañana es [tex]10-6=4\ \text{horas}[/tex]
La velocidad del coche es 150 km/hr
La distancia está dada por
[tex]\text{Distancia}=\text{Velocidad}\times \text{Tiempo}[/tex]
[tex]150\times 4=600\ \text{km}[/tex]
A distancia recorrida a las 10 de la mañana es de 600 km.
Ahora el tiempo que se toma está dado por
[tex]\text{Tiempo}=\dfrac{\text{Distancia}}{\text{Velocidad}}[/tex]
[tex]\dfrac{900}{150}=6\ \text{horas}[/tex]
El tiempo que se tarda en recorrer 900 km es de 6 horas.
Un objeto que es empujado sobre una superficie plana, tiene una masa de 80 kg y dicha fuerza tiene un valor de 300 N. Calcule la fuerza Normal y la fuerza de Fricción para que este en equilibrio. A. Ff=300 N N=784.8 N B. Ff=300 N N=780 N C. Ff=200 N N=750 N AYUDENME POR FA LA NECESITO
Responder:
A. Ff = 300 N N = 784,8 N
Explicación:
Dado
Masa del cuerpo = 80 kg
Fuerza de movimiento Fm = 300N
Dado que el cuerpo no está acelerando, la fuerza de fricción (Ff) es igual a la fuerza de movimiento que actúa sobre el cuerpo, ya que la fuerza de fricción es una fuerza de oposición, es decir, Fm = Ff
Dado que Fm = 300N, Ff = 300N
La reacción normal que actúa en el cuerpo es igual al peso.
N = W = mg
g es la aceleración debida a la gravedad
g = 9,8 m / s
N = mg
N = 80 (9,81)
N = 784,8N
Por tanto, la fuerza normal que actúa sobre el cuerpo es 784,8 N
Greg is giving a slide show presentation to a large audience. How might a laser best help him with the presentation?
A)He can use the laser to enlarge images on slides.
B)He can use the laser to point to specific information on the slides.
C)He can use the laser to scan and record information about the slides.
D)He can use the laser to make the images more clear.
Answer:
he can use the laser to point to specific information on the slides.
he can use the laser to point to specific information on the slides.Explanation:
He can use the laser to point to specific information on the slides might a laser best help him with the presentation. Hence, option B is correct.
What is meant by specific information?When something is referenced in the text, "specific information" refers to an explicit, precise fact or description of that item. Generally speaking, general information is nebulous and serves as a wide description of something.
A particular instance is a particular example. In order to present a specific example of technology, one could write about specific individuals using a specific machine. You would need to write about specific individuals in order to provide a concrete example of any human activity.
There are various specific issues that need to be resolved. To address particular challenges, specific groups may be formed. I prompted him to provide further details. She is from the United States, namely Boston.
Thus, option B is correct.
For more information about specific information, click here:
https://brainly.com/question/9777112
#SPJ6
A car slows down from 65 km/s to 30 km/s in 5 seconds. What is its acceleration?
In which of the following ways is region B in the diagram different from region D? (1 point)
A
Region B, the corpus callosum, separates the brain into two halves while region D, the cerebellum, communicates between the two halves.
B
Region B, the cerebrum, is one single unit composed of gray matter, while region D, the cerebellum, is divided into two hemispheres.
C
Region B, the corpus callosum, is composed of several lobes while region D, the cerebellum, only has one lobe.
D
Region B, the cerebrum, is divided into two hemispheres while region D, the cerebellum, is one single structure.
Answer:
C
Explanation:
Answer:
C
Region B, the corpus callosum, is composed of several lobes while region D, the cerebellum, only has one lobe.
Explanation:
When it reacts with another element, an oxygen atom gains two electrons.
What is the resulting particle?
A. An ion with a negative charge
B. An ion with no charge
C. An isotope with no charge
D. An ion with a positive charge
Answer:
A
Explanation:
An ion with a negative charge
Answer:A
Explanation:
How will you express the following in m: a. 10 nm b. 110 pm c. 120 mm d. 200 km
Please help me
Answer:
1 km = 1000 m
1 m = 100 cm
1 m = 1000 mm
1 cm = 10 mm
hope this helps u figure it out :)
What is the displacement of the elephant between 0s and 16 s?
m
What is the distance traveled by the elephant between 0s and 16 s?
m
Answer:
Displacement is 9m
Distance traveled is 9m
The table below compares the solubility of two substances in 100 milliliters (mL) of water.
SOLUBILITY OF SUBSTANCES
Solubility Temperature l Sucrose l Hydrochloric acid
l Grams/100mL water l Grams/100mL water
--------------------------------------------------------------------------------------------------------
Solubility at 20°C l 204 l 720
--------------------------------------------------------------------------------------------------------Solubility at 100°C l 488 l 989
Based on the table, which of the following statements is true?
The solubility of sucrose increases if more is dissolved.
The solubility of sucrose decreases as temperature increases.
The solubility of hydrochloric acid increases if more is dissolved.
The solubility of hydrochloric acid increases as temperature increases.
Answer:
d
Explanation:
I did the test and got it right.
Based on the table, the statement that is true about the solubility of two substances in 100 milliliters is the solubility of hydrochloric acid increases as temperature increases. The correct option is d.
What is solubility?Solubility is a condition when the solute is fully mixed with the solvent and there is no difference between the molecules of solvent and the solutes. The solubility of a substance is based on its molecules. If they are polar, then they can dissolve in numerous solvents.
The salt molecules are fully soluble in the water. The molecules which get dissolved are called the solute and the molecules that dissolve something within them, are called solvents.
Thus, the correct option is d, The solubility of hydrochloric acid increases as temperature increases.
To learn more about solubility, refer to the link:
https://brainly.com/question/8591226
#SPJ6
how height does a 2.5 Kg object rises when 255J of work done against gravity A 637.5 B 20.5 C 15m D 10.2 m
Answer:
D 10.2
Explanation:
255 ÷ 2.5= 10.2 or D
Answer:
D
Explanation:
Work = Mass * Gravity(9.8) * Height
height=work/(mass*9.8)
height=255/(2.5*9.8)=10.4m
PLEASE HELP!! ILL MARK BRAINLYEST!!!
A change in temperature causes a change in mass.
True
False
Answer:
False
Explanation:
It is better to go along with whatever the group is doing rather than being a little uncomfortable, staying through it yourself, and saying, no.
A: True
B: False
Answer:
true stick up for urself
3. A runner moving at a speed of 8.8m/s rounds a bend of radius 25m. Find the centripetal force of the 700N runner.
Answer:
Explanation:
Centripetal force is expressed as;
F = mv²/r
m is the mass = 700/10 = 70kg
v = 8.8m/s
r = 25m
Required
Centripetal force
Substitute the given parameters into the formula;
F = 70*8.8²/25
F = 70 * 77.44/25
F = 5420.8/25
F = 216.832N
Hence the centripetal force of the runner is 216.832N
How to calculate maximum height, when i know only V
Pleeeaaassseee as fast as you can
Answer: was it this problem?
Explanation:
Fill in each blank with the correct word.
A male reproductive cell is called a(n) .
A female reproductive cell is called a(n) .
When male and female reproductive cells join during fertilization, a(n) forms.
Answer:
male= sperm cell
female= egg cell
together= embryo
Explanation:
Answer:
1. sperm
2. egg
3. zygote
Explanation I took this test and these are the correct answers because the third one above is not right.
A standard baseball has a mass of 145 g. What is the weight of a standard baseball?
Answer: 1.42 N
Explanation:
Just took
A scientist is observing a eukarotic cell and a prokaryotic cell. Which structure could she only observe in the eukaryotic cell?
cytoplasm
DNA
ribosomes
a nucleus
Answer:
It's definitely Nucleus
Hope this Helps!
a) Calculate force FL upwards (the hand on the right)
b) Calculate Fr downwards
Answer:
did you find the answer yet??
Explanation:
2. A Se lanza un electrón con rapidez inicial v0 = 1.60×106 m/s hacia el interior de un campo uniforme entre las placas paralelas de la figura E21.33. Suponga que el campo entre las placas es uniforme y está dirigido verticalmente hacia abajo, y que el campo fuera de las placas es igual a cero. El electrón ingresa al campo en un punto equidistante de las dos placas. A) Si el electrón apenas elude la placa superior al salir del campo, encuentre la magnitud del campo eléctrico. B) Suponga que en la figura E21.33 el electrón es sustituido por un protón con la misma rapidez inicial v0. ¿Golpearía el protón una de las placas? Si el protón no golpea ninguna de las placas, ¿cuáles serían la magnitud y la dirección de su desplazamiento vertical, cuando sale de la región entre las placas? C) Compare las trayectorias que recorren el electrón y el protón, y explique las diferencias. D) Analice si es razonable ignorar los efectos de la gravedad para cada partícula.
Answer:
A) E = 145.6 N / C , B) y= 2,8 10-7 m with a downward direction
C) he shape of the trajectory of the two particles is to simulate a parabola,
D) F_{e} /F_{g} = 10³⁴
Explanation:
A) For this exercise we use Newton's second law to find the acceleration of the electron, where the force is electric
F = m a
- e E = m a
a = - e E / m
with the field directed downward, the acceleration is in the vertical upward direction.
We look for how much the electron moves with kinematics, in the x direction there is no acceleration,
x axis (parallel to plates)
x = v₀ t
t = x / v₀
y axis (perpendicular to plates)
y = y₀ + [tex]v_{oy}[/tex] t + ½ a t²
Let's take the zero of the system in the middle of the plates y₀ = 0, also the initial vertical velocity is zero (v_{oy} = 0) the width of the plate is known
y = ½ a t²
we substitute
y = ½ (e E /m) (x / v₀)²
y = ½ e x2 /m v₀² E
we look for the electric field
E = 2 m y v₀² / e x²
where to use this expression the length and width of the condenser must be known, suppose that the length is x = l = 1 cm = 1 10⁻² m and the width is y = 0.5 mm = 0.5 10⁻³ m
let's calculate
E = 2 9.1 10⁻³¹ 0.5 10⁻³ (1.6 10⁶)² / (1.6 10⁻¹⁹ (1 10⁻²)²)
E = 145.6 N / C
B) The electron is exchanged for a proton
Let's look for the vertical displacement, in this case as the proton has a positive charge it moves towards the bottom of the plates
y = ½ e x² / m v₀² E
y = ½ 1.6 10⁻¹⁹ 1 10⁻⁴ / (1.67 10⁻²⁷ (1.6 10⁶)² 145.6
y = 28.4375 10⁻⁸ m
since the distance between the plates is 0.5 10-3 m, the proton passes the condensate because its deflection is very small
In summary, its displacement is y= 2,8 10-7 m and with a downward direction (the same direction of the electric field)
C) The shape of the trajectory of the two particles is to simulate a parabola, but one for having a negative charge (electron) the force is upwards and the other for having a positive charge (proton) the trajectory is downwards
D) The force of gravity
[tex]F_{g}[/tex] = G m M / R²
electron
Between the electron and the positive charges of the conducting plate
F_{g}= 6.67 10⁻¹¹ 1.67 10⁻²⁷ 9.1 10⁻³¹ / (0.5 10⁻³)²
F_{g} = 4.1 10⁻⁵¹ N
electric force
F_{e} = -e E
F_{e} = - 1.6 10⁻¹⁹ 145.6
F_{e} = 2.3 10⁻¹⁷ N
let's look for the reason between these two forces
F_{e} / F_{g} = 2.3 10⁻¹⁷ / 4.1 10⁻⁵¹
F_{e} /F_{g} = 10³⁴
We see that the electric force is many orders of magnitude higher than the gravitational force.
Another coin is thrown up into the air and hit the ground after 6s with a velocity of -60 m/s after experiencing an acceleration of -9.8 m/s2. What was its initial velocity?
Answer:
Vf = Vi + a t fundamental equation
-60 m/s= Vi - 9.8 m/s^2 * 6 sec taking upward direction as positive
Vi =58.8 m/s - 60 m/s = -1.2 m/s so the coin was initially thrown downward
As a check take the downward direction as positive
Vf = 1.2 m/s + 58.8 m/s = 60 m/s
An object experiences a uniform circular motion in a horizontal plane, as illustrated below. The direction of the net force is ____. which letter
Answer:
C
Explanation:
Centripital force points to the center.
Using Newton's second law we can know the direction of the force that creates the uniform circular motion, the correct answer is:
C) The force must go towards the center of the circle
Newton's second law establishes a linear relationship between force and mass of the body and its relationship is
F = m a
The bold letters indicate vectors, where F is the force, m the mass that is a scalar and the acceleration of the body
By analyzing this expression we see that the direction of the net force and the acceleration are the same,
The uniform circular motion is characterized by having a speed, speed modulus, constant therefore in the movement the acceleration vector must be perpendicular to the speed so that the change is of direction only.
The acceleration must go towards the center of the circle and by Newton's second law the net force must also go towards the center of the circle.
Let's analyze the different strengths of the graph
a and d) Tangential force to the circle
False. This force changes the modulus of the velocity so the movement stops being uniform circular
e) outward perpendicular force
False. This force changes the direction of the velocity and maintains its modulus, but the antiparallel to the acceleration which contradicts Newton's second law
b) Force at an angle.
False. This force can be decomposed into two vectors, one parallel and the other perpendicular to the circle, the parallel vector combines the speed modulus and the movement is elliptical.
c) Force towards the center of the circle.
True. This force changes the direction of the velocity and maintains its modulus, in addition, the acceleration is in the direction of the change in velocity, which is why the particle describes the circle.
Using Newton's second law we can know the direction of the force that creates the uniform circular motion having the correct answer is:
c) The force must go towards the center of the circle
learn more about the centripetal force here:
https://brainly.com/question/14249440
In 2-3 sentences Explain the relationship between speed, frequency, and wavelength
Answer:
The relationship of the speed of sound, its frequency, and wavelength is the same as for all waves: vw = fλ, where vw is the speed of sound, f is its frequency, and λ is its wavelength. ... The frequency is the same as that of the source and is the number of waves that pass a point per unit time.
Explanation:
HOPE THIS HELPS ;}