Answer:
inclined plane
Explanation:
An inlcined plane is a simple machine used to slide an object over an obstacle
In which direction of the wave motion do longitudinal waves transfer energy?
A-perpendicular
B- parallel
C- close
D-equal
Answer:
B, Parallel.
Explanation:
Mark as brainliest pls!
The wave motion does longitudinal waves transfer energy in the direction Parallel to the wave motion. Hence, option B is correct.
What is a Wave?Waves are disturbances that move regularly and orderly from one location to another. Although sound, lighting, and the movement of elementary particles all have wave-like characteristics, surface waves that move on water are the most well-known.
The disturbance periodically oscillates with a set frequency and wavelength in the simplest waves (see periodic motion). In contrast to electromagnetic waves, which do not require a medium to travel and may move through a vacuum, mechanical waves, like sound, need a medium to go through. A medium's characteristics determine how a wave will travel across it. Seismic wave is also seen.
Therefore, option B is correct.
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HELP NEEDE ASAP!!!!!!!! How do you understand by the longitudinal wave? Describe the longitudinal nature of sound waves
Answer:
Sound as a Longitudinal Wave
For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport.
Answer:
Hey!
Here is your answer!
Explanation:
LONGITUDINAL WAVES:
These are waves where the transferral of energy is PARALLEL to the direction it travels in...For Example...Sound Waves are Longitudinal as they move in a series of COMPRESSIONS and RAREFACTIONS (typical of all Longitudinal Waves)...
The compressions are known in diagrams to be an area of a dense collection of PARTICLES where the energy (or sound in this case) is being transferred in the same direction as the movement...
The rarefactions are shown as almost empty area of particles where the medium (the matter of which the wave travels in) is moving...
Hope this helps!
*here's a diagram*
the weight of a body will be zero during free fall. Why?
Answer:
The apparent weight of a freely falling body is zero. When a body falls freely, it is falling with an acceleration =g. Thus the entire gravitational force acting on it is utilized in accelerating it and hence its weight is not felt.
A man is dragging a trunk up the loading ramp of a mover's
truck. The ramp has a slope angle of 20.00, and the man pulls
upward with a force of magnitude 375 N whose direction makes
an angle of 30.0° with the ramp. Find the horizontal and vertical
components of the force F.
Answer:
Horizontal component = 241 N
Vertical component = 287 N
Explanation:
Given:
Force = F = 375 N
Referring to diagram attached, the force F is making an angle
theta = 20+30 = 50 with the horizontal.
Horizontal component = F*cos(theta) = 375*0.64278 = 241 N
Vertical component = F*sin(theta) = 375*0.76604 = 287 N
The vertical component of the force is 187.5 N and the horizontal component of the force is 324.8 N.
A vector is a any quantity that has both magnitude and direction. We can resolve any vector into its vertical and horizontal components. The vertical component of a vector such as force is F sin θ while the horizontal component of the force is F cos θ.
Given the following information from the question;
F = 375 N
θ = 30.0°
Vertical component(Fy) = 375 N sin 30.0° = 187.5 N
Horizontal component (Fx) = 375 N cos 30.0° = 324.8 N
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Find average speed in
time interval t = 2 tot = 10s
Distance (m)
10+
8-
2
+ Time (s)
10
Answer: 3.75 m/s
Explanation:
Average speed is distance covered per time taken.
If the time interval is from t = 2 to t = 10s
Then, the time taken will be
t = 10 - 2 = 8s
Given that the distance covered are 10 + 8 - 2 + 10
Since distance is a scalar quantity, we will only consider the magnitude and not the direction.
Total distance = 10 + 8 + 2 + 10 = 30m
Average speed = total distance/time
Substitute total distance and time into the formula
Average speed = 30/8
Average speed = 3.75 m/s
If a locomotive uses steam at
100°C, and dumps heat into air
at 22.0°C, what is the highest
possible efficiency it could have?
Answer:
79%
Explanation:
Data obtained from the question include the following:
Input temperature = 100°C
Output temperature = 22°C
Efficiency =.?
Next, we shall convert celsius temperature to Kelvin temperature.
This is illustrated below:
T(K) = T (°C) + 273
Input temperature = 100°C
Input temperature in Kelvin = 100°C + 273 = 373K
Output temperature = 22°C
Output temperature in Kelvin = 22°C + 273 = 295K
Finally, we shall determine the efficiency of the locomotive as follow:
Efficiency = output /input x 100
Output = 295K
Input = 373K
Efficiency =?
Efficiency = output /input x 100
Efficiency = 295/373 x 100
Efficiency = 79%
Therefore, the efficiency of the locomotive is 79%.
Answer:
The answer is .209
Explanation:
I am unable to show the work for this as I did it online but I can assure you it is correct
The kicker now kicks the ball with the same speed as in the number of 4,but at 60.0°from the horizontal or 30.0° from the vertical. a.What is the time the ball is in the air? b.What is the distance the balls travel before it hits the ground? c.What is the maximum height?
Answer:
Explanation:
1) The time of flight equation for projectile motion can be used here to find total time in air.
t = 2vsin∅ / g
where v is speed, Ф is launch angle
t = 2×4×sin 60 / 9.8
t = 0.71 seconds
2) Distance where it hit the ground is called as range and has the following standard equation
D = v² sin2Ф/g
D = 4²sin 2×60 / 9.8
D = 1.41m
3) Maximum elevation is maximum time reached
h = v² sin²Ф / 2g
h = 4²sin² 60 / 2*9.8
h = 0.61 m
what is the current if 12 ohm and 4 ohm resistors are connected in parallel and 12 V potential difference is applied
The two resistors in parallel behave like 3 ohms.
I = V / R
Current = 12/3 = 4 Amps
write a story that ends with poor no friend
Answer:
Writing of a story that ends with the character becoming poor with no friends.
Explanation:
There was a young girl who believed that all things revolve around her. She had the money, the power, the family, and the beauty to ensure she was the center of attention. She would always be the main focus, everywhere she goes.
But there came a time when she had a major misfortune. Her family had come upon unfortunate times. They are going to lose their money and may even be jailed for embezzlement. It was true that she had no idea what her parents had done but she was also so familiar with the 'princess' lifestyle that she did not know how to downgrade her lifestyle. And so, when this misfortune happened, she was unsure how to react. She also assumed that her friends will be there for her. Little did she know everyone was just after her wealth and influence and had nothing to do with genuine friendship.
In a few months, their family position moved from top to bottom, which everyone found hard to accept. She had to maintain her status while at the same time try to live up with that without losing her circle. But as rumors spread fast and she wasn't able to spend the way she would normally send, she eventually experienced a dwindled friend circle. And in about a year, she had lost all of her friends, couldn't even convince someone to stay with her faithfully and worse of all, she was also poor, the very status she had degradingly taunted other people with.
Infrared waves have higher frequencies than microwaves. Which statement best compares the energy of these two types of waves?
Each infrared photon carries more energy than any microwave photon.
(If this statement is not one of the choices, then it's really sad that you couldn't show us the list of choices to select from.)
Answer:
The energy of infrared waves is more than that of microwaves.
Explanation: Just completed on Edmentum
Which describes reproducibility? The ability of data to be published. The ability of data to be duplicated. The ability of data to be changed. The ability of data to be invalidated.
Answer:
the ability of data to be duplicated well described reproducibility
Explanation:
Reproducibitity of a data is the ability of a data to be produced in multiple times using the same procedure. It is used to test how precise a data is and it's usually known as standard deviation
Reproducibility is the closeness of the understanding between the consequences of measurements of the equivalent measurand did with a similar procedure depicted in the relating logical proof (for example a distribution in a companion surveyed diary).
Answer:
the ability of data to be duplicated well described reproducibility
a boy runs from his house to school at speed 5m/s on a straight road and returns with speed of 10m/s.The distance between the house and school is 100m. Find his average velocity.... with explaination please
Explanation:
time spent to run from house to school=100/5=20s
time spent to return from school=100/10=10s
average velocity=200m/(10+20)
=6.66m/sA small block slides down an incline with a constant acceleration. The block is released from rest at the top of the incline. After it travels 5 m to the bottom its speed is 5 m/s. What is the speed, in m/s, of the block when it had traveled only 2.1 m from the top
Answer:
v = 3.24 m/s
Explanation:
Since we don't have time, we can use the formula;
(Final distance - initial distance)/time = (initial velocity + final velocity)/2
Thus;
(x_f - x_i)/t = ½(v_xi + v_xf)
We are given;
x_i = 0 m
x_f = 5 m
v_xi = 0 m/s
v_xf = 5 m/s
Thus, plugging in the relevant values;
(5 - 0)/t = (0 + 5)/2
5/t = 5/2
t = 2 s
Using Newton's first law of motion, we can find the acceleration.
v = u + at
Applying to this question;
5 = 0 + a(2)
5 = 2a
a = 5/2
a = 2.5 m/s²
To get the speed, in m/s, of the block when it had traveled only 2.1 m from the top, we will use the formula;
v² = u² + 2as
v² = 0² + 2(2.5 × 2.1)
v² = 10.5
v = √10.5
v = 3.24 m/s
Which of these statements describes a constraint imposed on scientific
researchers by the Antarctic Treaty System?
A. The safety of scientists is ensured.
B. Facilities are inspected for compliance.
c. Some areas are protected from human activity.
D. Scientific knowledge is not shared.
Answer:
The answer is C.
La física moderna se encarga del estudio de: a) Las interacciones que conducen a un cambio de movimiento b) Los fenómenos luminosos considerando a la luz como un movimiento ondulatorio electromagnético c) Las interacciones debidas a cargas eléctricas d) Los comportamientos de las partículas que forman la materia y las fuerzas que las rigen
Answer:
corrct are a and d
Explanation:
La denominada Física moderna se desarrollo a principios del siglo XX, en respuesta a la imposibilidad de la física clásica de Newton de explicar una serie de fenómenos.
En es física moderna se desarrollo un modelos para explicar el movimiento de los cuerpo que toma como base que la velocidad máxima de un cuerpo es la velocidad de la luz en el vació, esta parte es denominada relatividad especial.
En consecuencia la afirmación correcta es a
En un segunda partee la fiscal moderna se desarrollo un explicablemente intercalación de las partículas que forman la materia ( átomos) y la fuerzas (potenciales ) con que interactúan, esta segunda parte se denomina Mecánica cuántica.
Por lo cual la otra respuesta correcta es la d
Traslate
The so-called modern physics was developed at the beginning of the 20th century, in response to the impossibility of Newton's classical physics to explain a series of phenomena.
In modern physics, a model was developed to explain the movement of the body based on the fact that the maximum speed of a body is the speed of light in vacuum, this part is called special relativity.
Consequently the correct statement is to
In a second part of the modern prosecutor, an explanatory intercalation of the particles that make up matter (atoms) and the (potential) forces with which they interact is developed, this second part is called Quantum Mechanics.
So the other correct answer is d
A company plans to build a new mega store next to a wetland. Which of the following should it do to make sure it has scientific knowledge to inform its decision? Hire an environmental company to study the wetland and give recommendations of how to prevent flooding Ask a developer to build a new housing development next to the store site Have the city council review the architectural plans Conduct a survey to see how often people in the neighborhood shop
Answer:
The correct option is;
Hire an environmental company to study the wetland and give recommendations of how to prevent flooding
Explanation:
Due to the environmental importance of wetlands which are important plant and animal habitats and a source of filtration of reserve of water moving into other surface water bodies and underground aquifers, serving also as a buffer zone to prevent erosion and flooding during heavy rain storms, proper, detailed and well informed environmental considerations are required
As such an environmental consultant services is needed for site analysis, appraisal and recommendation will be required to fast track the process of obtaining a permit.
Answer:
A
Explanation:
Tsar Nicholas II and Tsarina Alexandra were the Roma
place in 1917. During this revolution, Tsar Nicholas Il v
killed. The remains of two of the Tsar and Tsarina's chi
people came forward who claims to be the missing Ro
Alexei?
O DNA technology
O STR analysis
O mtDNA analysis
O Y-chromosome analysis
An iron nail floats in mercury and sinks in water. Explain why?
Answer:
this is because mercury is more dense than iron nail, while water is less dense than the nail.
Explanation:
Answer:
Density
Explanation:
This is because of difference in densities of iron nail, mercury and water. Iron nail is less dense than mercury so it floats on mercury while it is more dense than water so it sinks!
state any two physical properties for believing that aluminium is a metal.
Answer:
amongst the properties that makes aluminium a metal is that it is malleable and ductile...and it has high melting and boiling points
I hope that helps
Explanation:
properties of metals include
1. high melting and boiling points
2 high densities
3 malleability and ductility
why decomposition of sugar on heating is an irreversible change.
Answer:
The heat of formation of the products of the heating of sugar, which is caramel is higher and due to the new complexes formed such there is increased change in free energy between the products and the reactants of the sucrose decomposition by heating, making the reaction is irreversible
Explanation:
Sugar, also known as sucrose, C₁₂H₂₂O₁₁, is a disaccharide made up two monosaccharides, fructose, C₆H₁₂O₆, and glucose, C₆H₁₂O₆ joined together by a glycosidic covalent bond as such the molecule of sugar has one less molecule of H₂O than the fructose and the glucose it is made of which on heating the sugar the glycosidic bonds break and due to deficiency in the amount of H₂O the fructose and glucose combine with themselves to form caramel which has a much lower hydrogen and oxygen proportion such as C₂₄H₂₆O₁₃, which is darker and contains free radicals making caramel sticky.
Therefore, the heat of formation of the caramel is higher and due to the formation of the complexes there is increased change in free energy between the products than the reactants of the decomposition of sugar by heating, therefore, the reaction is irreversible.
Which force best represents Fg
Answer:
The weight of barbell acting on a weight lifter is 80N.
Explanation:
Does the earths magnetic field change with time?
Answer:
As per the fossil fuel records, magnetic field reversal does not impact living beings. It will take almost a century for the poles to complete the shift. Meanwhile, the earth is left with almost zero magnetic field.
Why does time slow down the closer you get to a black hole, I know that time slows down the faster you move through space and the closer you get to the speed of light, but how does being near a black hole slow time down even futher?
Answer:
Near the black hole, The gravitational pull is so strong and the black hole has a lot of stress energy. This causes the clock to tick slower than usual and due to this , Time slows down to a great extent.
At the equator, near the surface of the Earth, the magnetic field is approximately 50.0 μT northward, and the electric field is about 100 N/C downward in fair weather. Find the gravitational, electric, and magnetic forces on an electron in this environment, assuming that the electron has an instantaneous velocity of 8.50 ✕ 106 m/s directed to the east.
Answer:
A) F_g = 8.9278 × 10^(-30)
B) F_e = 1.6 × 10^(-17) N upwards
C) F_m = 6.8 × 10^(-17) N downwards
Explanation:
A) Formula for gravitational force is;
F_g = m_e × g
m_e is mass of electron = 9.11 x 10^(-31) kg
F_g = 9.11 x 10^(-31) × 9.8
F_g = 8.9278 × 10^(-30) N downwards
B) Formula for Electric force is;
F_e = qe
q is charge on electron = 1.6 × 10^(-19) C
E is electric field = 100 N/C
F_e = 1.6 × 10^(-19) × 100
F_e = 1.6 × 10^(-17) N upwards
C) Magnetic force is given by the formula;
F_m = qVB
q is charge on electron = 1.6 × 10^(-19) C
V is velocity given as 8.50 × 10^(6) m/s
B is magnetic field = 50.0 μT = 50 × 10^(-6) T
F_m = 1.6 × 10^(-19) × 8.50 × 10^(6) × 50 × 10^(-6)
F_m = 6.8 × 10^(-17) N downwards
Un proyectil es lanzado horizontalmente desde una altura de 12 metro con una velocidad de 80 m/sg. a.Calcular el tiempo de vuelo b. Su alcance horizontal y velocidad de impacto contra el suelo.
Answer:
t= 1,56 s , x= 124,8 m , v = (80 i^ - 15,288 j ) m/s
Explanation:
Este es un ejercicio de lanzamiento proyectiles, comencemos por encontrar el tiempo que tarda en llegar al piso
y = y₀ + [tex]v_{oy}[/tex] t – ½ g t²
en este caso la altura inicial es y₀= 12 m y llega a y=0 , como es lanzado horizontalmente la velocidad vertical es cero (v_{oy}=0)
0 = y₀ – ½ g t²
t= √ (2 y₀/g)
calculemos
t= √ ( 2 12 / 9,8)
t= 1,56 s
El alcance del proyectil es la distancia horizontal recorrida
x = v₀ₓ t
x = 80 1,56
x= 124,8 m
La velocidad de impacto cuando toca el suelo
vx = v₀ₓ = 80 ms
[tex]v_{y}[/tex] = v_{oy} – gt
v_{y} = - 9,8 1,56
v_{y} = - 15,288 m/s
la velocidad es
v = (80 i^ - 15,288 j ) m/s
Traducttion
This is a projectile launching exercise, let's start by finding the time it takes to reach the ground
y = y₀ + v_{oy} t - ½ g t²
in this case the initial height is i = 12 m and it reaches y = 0, as it is thrown horizontally the vertical speed is zero ([tex]v_{oy}[/tex] = 0)
0 =y₀I - ½ g t²
t = √ (2y₀ / g)
let's calculate
t = √ (2 12 / 9.8)
t = 1.56 s
Projectile range is the horizontal distance traveled
x = v₀ₓ t
x = 80 1.56
x = 124.8 m
Impact speed when it hits the ground
vₓ = v₀ₓ = 80 ms
v_{y} = v_{oy} - gt
v_{y} = - 9.8 1.56
v_{y} = - 15,288 m / s
the speed is
v = (80 i ^ - 15,288 j) m / s
The volume of a piece of metal of a mass 6 gram is 15cm3. What is the density of the metal piece?
Answer:
0.4 g/cm^3
Explanation:
The density of an object can be found using the following formula.
d= m/v
where m is the mass and v is the volume.
The mass of the metal is 6 grams and the volume is 15 centimeters^3
m=6 g
v= 15 cm^3
Substitute these into the formula.
d= 6 g/ 15 cm^3
Divide 6 g by 15 cm^3 (6/15=0.4)
d= 0.4 g/ cm^3
The density of the metal is 0.4 grams per cubic centimeter.
Density = (mass) / (volume)
Density = (6 g) / (15 cm³)
Density = (6/15) (g/cm³)
Density = 0.4 g/cm³
This 'metal' has less than half the density of water, and it floats on water ! It cannot be of Earthly origin, and must have been dropped here by aliens.
Either that, or else the metal has been hammered and stretched and beaten out and shaped so that it has an artificially large volume ... something like the way sailing ships are made out of thick plates of steel.
in travelling 65cm along the barrel of a rifle a bullet accelerates from rest to 230 m/s. Find the acceleration and the time the bullet is in the barrel.
Answer:
[tex]2ax=v_{2}^{2}-v_{1}^{2}\\2a(\frac{65}{100})=230^{2}-0^{2}\\a=40692\frac{4}{13}m/s^{2}\\\\x=\frac{1}{2} at^{2}\\\frac{65}{100}=\frac{1}{2}(40692\frac{4}{13})t^{2}\\t=0.0101896s[/tex]
I've written all the needed equations for you. All you have to do is some replacements.
Please do not hesitate to ask further questions.
160 km
Hope this helps....
On which body would a 10 kg lamp have the most gravitational potential energy when lifted to height of 2 m? A) Earth B) Mars C) Neptune D) Uranus
Answer: C.) Neptune
Explanation:
The Gravitational Potential Energy (GPE) of a body is calculated using the formula :
GPE = mgh
Where m = mass of the body
g = acceleration due to gravity
h = distance above a surface
Mass = 10kg
h = 2m
Using the formula :
GPE of lamp on Earth: g = 9.8
GPE = 10 × 9.8 × 2 = 71.8J
GPE of lamp on Mercury: g = 3.59
GPE = 10 × 3.59 × 2 = 196J
GPE of lamp on Mars: g = 3.7
GPE = 10 × 3.7 × 2 = 74J
GPE of lamp on Neptune: g = 14.07
GPE = 10 × 14.07 × 2 = 281.4J
GPE of lamp on Uranus: g = 9
GPE = 10 × 9 × 2 = 180J
GPE of lamp on Pluto: g = 0.42
GPE = 10 × 0.42 × 2 = 8.4J
Neptune has the highest gravitational potential energy as the value of acceleration due to gravity acting on objects is highest on Neptune.
Answer:
The correct option is;
C) Neptune
Explanation:
The force of gravity is given by the equation;
[tex]F_g = G\dfrac{m_1m_2}{r^2} = m_2 \times g[/tex]
Where:
m₁ = Mass of the planet
m₂ = Mass of the body = 10 kg
r = The distance between the body and the planet = 2 m
g = Gravitational acceleration on the planet
G = Gravitational constant
Given that the potential energy, PE = m × g × h
We have that,
[tex]PE = m_2 \times g \times (r + 2) = G\dfrac{m_1m_2}{r^2} \times (r + 2) \approx G\dfrac{m_1m_2}{r^2} \times r = G\dfrac{m_1m_2}{r}[/tex]
Therefore, the gravitational potential energy is directly proportional to the acceleration of gravity, such that the body will have the most gravitational potential energy in the planet with the highest acceleration due to gravity which is Neptune with acceleration due to gravity of 14.07 m/s².
a ball is rolling along a ground with a velocity of 10m/s and comes to rest after 8s.what is its acceleration
Answer:
-1.25 m/s²
Explanation:
Use the formula a=(v-u)/t,
acceleration a = unknown
final velocity v= 0 m/s (rest)
initial velocity u = 10m/s
time t = 8s
a = (0-10)/8
a = -1.25 m/s²
I NEED HELP PLEASE, THANKS! :)
Three 15.0-W resistors are connected in parallel across a 30.0-V battery. Please show all work.
a) Find the current through each branch of the circuit.
b) Find the equivalent resistance of the circuit.
c) Find the current through the battery.
Answer:
Take a look at the attachment below.
Explanation:
Current for each branch of the circuit is 2A and equivalent resistance of the circuit will be 5 ohms. The current through the battery is 6A.
What is Current?An electric current is defined as a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space, which is described as the flow of electric charge through a surface or in a control volume.
Current is expressed as:
I=V/R
Where, I is the current
V is the voltage
R is the resistance
For above given information,
Since all resistors have the same resistance, it would be fine to find only 1 branch as the current would be the same for all branches.
[tex]I=V/R_1[/tex]
I= 30/15= 2 A
Equivalent resistance for parallel circuits is the sum of reciprocals of each resistor.
[tex]1/R= 1/R_1+ 1/R_2+ 1/R_3[/tex]
1/R= 1/15+ 1/15 + 1/15
1/R=3/15
R = 15/3= 5 ohms
I = V/R
Where I is current, V is voltage and R is the equivalent resistance
=> I = 30/5
=> I = 6 A
Thus, current for each branch of the circuit is 2A and equivalent resistance of the circuit will be 5 ohms. The current through the battery is 6A.
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