Answer:
0.141Hz
Explanation:
Given parameters:
Velocity of the wave = 1.7m/s
Wavelength = 12.05m
Unknown:
Frequency of the wave = ?
Solution;
To solve this problem, we use the wave velocity equation which is expressed below;
V = F ∧
V is the velocity
F is the frequency
∧ is the wavelength
Now insert the parameters and solve;
1.7 = F x 12.05
F = 0.141Hz
An object on Earth's surface has a mass of 18.7 kg. The object's weight is ________ N.
Answer:
The mass of an object is the same on Earth, in orbit, or on the surface of the Moon. ... the absence of air resistance, all objects fall with the same acceleration g. ... A 1.0-kg mass thus has a weight of 9.8 N on Earth and only about 1.7 N ... What force does he apply if the stone accelerates at a rate of 1.5m/s2?
Explanation:
Which type of wave is represented in this picture?
Answer:
The first one with the rope would be a transverse wave and the second with the slinky would be a longitudinal wave
ANSWER ASAPPP
Rosario’s science teacher gives her three liquid substances. The substances are red, clear, and blue. Rosario places the three substances in a graduated cylinder as shown.
What is the relative density of the substances given this arrangement?
densest: blue; medium dense: clear; least dense: red
densest: clear; medium dense: blue; least dense: red
densest: red; medium dense: clear; least dense: blue
densest: clear; medium dense: red; least dense: blue
Answer:
densest: blue; medium dense: clear; least dense: red
Explanation:
i've done this question before :)
The car has a mass of 22,000Kg. Calculate the force needed to stop the car.
Answer:
Momentum of car = 1200 kg * 10 m/s = 12000 kgm/s Momentum = Force * time 12000 kgm/s = Force * 20s Force = 600 N
Explanation:
Calculate the force of gravity between two objects of masses 1300 kg and 7800 kg, which are 0.23 m apart.
Answer:
F = Gm1m2/r^2 where G = 6.67x10^-11, m1 =1300, m2 = 7800, r = 0.23m
F = 6.67x10^-11 *1300*7800/(0.23)^2 = 0.0127852N
Explanation:
help?? ASAP ill give brainlist
Answer:
i think its a wave length
Question 1 (5 points) What is the frictional force acting on a 100 kg box as it moves across the floor with an acceleration of 1.5 m/s2, if the applied force is 300N? -150 N Ob 150 m/s2 C 150 N od -300 N Review Answers
Answer:HJKGFHJYKIUGFJDTGYKUGFJDSX
Explanation:65TTY6Y Y YY. ;D DDS
HVC BJCHGNMGHJFYIKUHYGFTR6457TY8IUOHJKGYTDYR567YUOI8HJKBGJMVHDTR5E46T7Y TFGDGHYUFVYH T7UYGHUGFTY Y6TURF67URY
\\Choose the answer that is most descriptive the Milky Way Galaxy.//
A. Giant nebula's, star nurseries, gas clouds, binary stars.
B. Black holes, quasars, gamma rays, galaxy clusters.
C. 200-400 billion stars, 100,000 light years diameter, spiral arms.
D. Planets, stars, comets, asteroids, planet asteroids, moons.
Answer:
it is C i dont need no explanat
Explanation:
The microwaves have a frequency of 1.8 x 10^9 Hz and travel at a speed of 3.0 x 10^8 m/s.
Calculate the wavelength of the microwaves. Give your answer to two significant figures
Answer:
0.17 m
Explanation:
The formula to apply in this question is that of speed of light.
The speed of the microwaves :
v = f * λ ------where f is frequency of the microwave, λ is the wavelength and v is the speed of the wave
3.0 x 10⁸ = 1.8 x 10⁹ *λ
3.0 x 10⁸ / 1.8 x 10⁹ = λ
λ = 0.16666666666
λ = 0.17 m { two significant figures}
SOMEONE HELP PLEASE ASAP ITS TIMED
A boy is slowly pushing a box across the floor. In which direction is friction occurring?
a. away from the boy
b. toward the boy
c. up
d. down
A solution containing 3.4 moles of pl3 and one l water
Answer:
c
Explanation:
c
Help, please! I really don't understand potential and kinetic energy
Answer:
C is the correct answer.
Roller coasters accelerates from initial speed of 6.0 M/S2 final speed of 70 M/S over four seconds. What is the acceleration?
Answer:
[tex]a=16\ m/s^2[/tex]
Explanation:
Motion With Constant Acceleration
It's a type of motion in which the velocity of an object changes uniformly in time.
The formula to calculate the change of velocities is:
[tex]v_f=v_o+at[/tex]
Where:
a = acceleration
vo = initial speed
vf = final speed
t = time
The roller coaster moves from vo=6 m/s to vf=70 m/s in t=4 seconds. To calculate the acceleration, solve for a:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
[tex]\displaystyle a=\frac{70-6}{4}=\frac{64}{4}[/tex]
[tex]\boxed{a=16\ m/s^2}[/tex]
1. The resultant force on a ball is not zero. What will happen to the ball? *
(1 Point)
It will move or change direction.
O it will remain stationary.
O it will spin on its axis.
Answer:
it will more and change direction
Explanation:
because the resultant force (R) is not equal zero so may be there is a force greater than the other one and the ball will more in the direction of greater force.
and it can't be remain stationary because R=! 0 .
Define efficiency of a simple machine? Do you think that in actual practice the efficiency of a machine is 100°/•? If not, explain the reason?
Explanation:
Part 1 :
The efficiency of a simple machine is defined as the ratio of useful work done by the machine ( output work ) to the total work put into the machine ( input work ).
Part 2 : [tex] \boxed{ \sf{No}}[/tex]
In practice , the work output of a machine is always less than the work input due to the effect of friction. Since, there is always some loss of energy in the machine , if the frictional force in machines increases , efficiency decreases. Because machines are not frictionless in practice , efficiency of a machine is never 100% or greater.
Hope I helped ! ツ
Have a wonderful day / night ♪
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Moji listed the solids in order of hardness as graphite < chalk < quartz. His
peer group suggested some experimental errors that may have caused this to
happen. Which experimental error most likely led Moji to this conclusion?
A. Moji might have used color as an indication of hardness.
B. Moji might have thought that crumbliness was a sign of softness.
C. Moji might have thought that crumbliness was a sign of hardness.
D. Moji could have chosen hardness tests that were not reliable.
Answer: D.
Explanation:
Moji listed the solids in order of hardness as graphite < chalk < quartz. because his peer group suggested some experimental errors that may have caused this to happen. The experimental error most likely led Moji to the conclusion that Moji could have chosen hardness tests that were not reliable. Therefore the correct option is D.
What is the matter?Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gases, and plasma.
These different states of matter have different characteristics according to which they vary their volume and shape.
There are various tests to judge the mechanical hardness of any solid material such as the Rockwell hardness test, Brinell's hardness test,Vicker's diamond hardness test, and Knoop's hardness test which is also known as microhardness test
The experimental error most likely led Moji to the conclusion that Moji could have chosen hardness tests that were not reliable. Therefore the correct option is D.
Learn more about the matter here
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what is everyone's take on time travel?
Answer:
Its not really possible I don't think. UNLESS! You fall into a manhole then find a wirling vortex in the sewers! : )
Explanation:
Atom X has an atomic number of 10. Atom Y has an atomic number of 4. All of these statements about atoms X and Y are correct except
A . atom X has 8 valence electrons
B. atom Y is less reactive than atom X
C. atom Y has 2 valence electrons
D atom X has the same number of energy levels as atom Y
How do scientists classify species?
A. By comparing the ages of individuals
B. By comparing common names
C. By comparing who discovered them
D. By comparing traits
Answer:
D. By comparing traits
Explanation:
Because age isn't genetic, as well as names, as well as who discovered, but traits are genetic.
Answer:
D
Explanation:
How much power must an engine have to lift a 10,000 kg safe at a constant velocity to a 26 m height in 5 seconds?
Answer:
520kw or 520, 000w
Explanation:
Given that power equsls workdone /time taken
P=mgh
____
t
M=10, 000kg
h=26m
T=5sec
g=10m/s²
Recall:
P=mgh/t
P=10,000×10×26/5
P=20,000×26
P=520,000w or 520kw
Can you hear this Picture???
If you know it, you get it
Answer:
Ah yes.. Beetlejuice
Explanation:
I hear it so well ngl
Microwaves travel at the speed of light, 300,000 km/s. What is the wavelength of a microwave received at 1000 gigahertz?
Answer:
3 x 10⁻⁴m
Explanation:
Given parameters:
Speed of light = 300000km/s
Frequency = 1000gigahz = 1000 x 10⁹Hz
Unknown:
Wavelength = ?
Solution:
To solve this problem, we use the expression below:
V = F ∧
V is the speed
F is the frequency
∧ is the wavelength
300000 = 1000 x 10⁹ x ∧
Wavelength = 3 x 10⁻⁷km = 3 x 10⁻⁴m
A pendulum consists of a 2.0 kg stone swinging on a4.0 m string of negligible mass. The stone has a speed of 8.0 m/swhen it passes its lowest point. (a) What is the speed when thestring is at 60# to the vertical? (b) What is the greatest angle withthe vertical that the string will
Answer:
a) [tex]v_{60^{o}} =4.98 m/s[/tex]
b) [tex]\theta_{max}=79.34^{o}[/tex]
Explanation:
This problem can be solved by doing an energy analysis on the given situation. So the very first thing we can do in order to solve this is to draw a diagram of the situation. (see attached picture)
So, in an energy analysis, basically you will always have the same amount of energy in any position of the pendulum. (This is in ideal conditions) So in this case:
[tex]K_{lowest}+U_{lowest}=K_{60^{o}}+U_{60^{0}}[/tex]
where K is the kinetic energy and U is the potential energy.
We know the potential energy at the lowest of its trajectory will be zero because it will have a relative height of zero. So the equation simplifies to:
[tex]K_{lowest}=K_{60^{o}}+U_{60^{0}}[/tex]
So now, we can substitute the respective equations for kinetic and potential energy so we get:
[tex]\frac{1}{2}mv_{lowest}^{2}=\frac{1}{2}mv_{60^{o}}^{2}+mgh_{60^{o}}[/tex]
we can divide both sides of the equation into the mass of the pendulum so we get:
[tex]\frac{1}{2}v_{lowest}^{2}=\frac{1}{2}v_{60^{o}}^{2}+gh_{60^{o}}[/tex]
and we can multiply both sides of the equation by 2 to get:
[tex]v_{lowest}^{2}=v_{60^{o}}^{2}+2gh_{60^{o}}[/tex]
so we can solve this for [tex]v_{60^{o}}[/tex]. So we get:
[tex]v_{60^{o}}=\sqrt{v_{lowest}^{2}-2gh_{60^{0}}}[/tex]
so we just need to find the height of the stone when the pendulum is at a 60 degree angle from the vertical. We can do this with the cos function. First, we find the vertical distance from the axis of the pendulum to the height of the stone when the angle is 60°. We will call this distance y. So:
[tex]cos \theta = \frac{y}{4m}[/tex]
so we solve for y to get:
[tex]y = 4cos \theta[/tex]
so we substitute the angle to get:
y=4cos 60°
y=2 m
so now we can find the height of the stone when the angle is 60°
[tex]h_{60^{o}}=4m-2m[/tex]
[tex]h_{60^{o}}=2m [/tex]
So now we can substitute the data in the velocity equation we got before:
[tex]v_{60^{o}}=\sqrt{v_{lowest}^{2}-2gh_{60^{0}}}[/tex]
[tex]v_{60^{o}} = \sqrt{(8 m/s)^{2}-2(9.81 m/s^{2})(2m)}[/tex]
so
[tex]v_{60^{o}}=4.98 m/s [/tex]
b) For part b, we can do an energy analysis again to figure out what the height of the stone is at its maximum height, so we get.
[tex]K_{lowest}+U_{lowest}=K_{max}+U_{max}[/tex]
In this case, we know that [tex]U_{lowest}[/tex] will be zero and [tex]K_{max}[/tex] will be zero as well since at the maximum point, the velocity will be zero.
So this simplifies our equation.
[tex]K_{lowest} =U_{max}[/tex]
And now we substitute for the respective kinetic energy and potential energy equations.
[tex]\frac{1}{2}mv_{lowest}^{2}=mgh_{max}[/tex]
again, we can divide both sides of the equation into the mass, so we get:
[tex]\frac{1}{2}v_{lowest}^{2}=gh_{max}[/tex]
and solve for the height:
[tex]h_{max}=\frac{v_{lowest}^{2}}{2g}[/tex]
and substitute:
[tex]h_{max}=\frac{(8m/s)^{2}}{2(9.81 m/s^{2})}[/tex]
to get:
[tex]h_{max}=3.26m[/tex]
This way we can find the distance between the axis and the maximum height to determine the angle of the pendulum about the vertical.
y=4-3.26 = 0.74m
next, we can use the cos function to find the max angle with the vertical.
[tex]cos \theta_{max}= \frac{0.74}{4}[/tex]
[tex]\theta_{max}=cos^{-1}(\frac{0.74}{4})[/tex]
so we get:
[tex]\theta_{max}=79.34^{o}[/tex]
The speed when the string is at 60 degrees to the vertical is approximately 8.85 m/s. The greatest angle with the vertical that the string will make is approximately 57.6 degrees.
(a) To find the speed when the string is at 60 degrees to the vertical, we can apply the conservation of mechanical energy between the lowest point (initial position) and the 60 degrees point (final position).
At the lowest point, all of the gravitational potential energy is converted into kinetic energy:
m × g × h = (1/2) × m × v²
v = √(2 × g × h) = √(2 × 9.8 × 4.0) ≈ 8.85 m/s.
Therefore, the speed when the string is at 60 degrees to the vertical is approximately 8.85 m/s.
(b) The greatest angle with the vertical that the string will make, we need to determine the maximum height reached by the stone. At the highest point, all of the kinetic energy is converted into gravitational potential energy:
(1/2) × m × v² = m × g h(max)
h(max) = (v²) / (2 × g) = (8.0²) / (2 × 9.8) ≈ 3.27 m.
Using the sine function:
sin(Θ) = h(max) / 4.0,
Θ = sin⁻¹(h(max) / 4.0) ≈ sin⁻¹(3.27 / 4.0) ≈ 57.6 degrees.
Therefore, the greatest angle with the vertical that the string will make is approximately 57.6 degrees.
To know more about potential energy:
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what caused the rate of the erosion to change around 1905 and 1906
Answer:
What caused the slope to change around 1905 and 1906? Building the Canadian hydroelectric plant reduced the rate of erosion after 1906. This change in the rate of erosion is represented by the change in the slope on the graph. Hydroelectric dams convert kinetic energy from moving water to electrical energy.
Answer:
In 1906, around the time the Canadian hydroelectric plant began operating, the erosion rate decreased to approximately 0.7 meters per year.
Explanation:
Which type of wave interaction is shown in the diagram?
Answer:
Destructive inference
Explanation:
I just took the test
The type of wave interaction that is shown in the diagram is destructive interference. The correct option is C.
Destructive interference happens when two or more waves mix in such a way that they cancel each other out, causing the amplitude (or intensity) of the resulting wave to drop or disappear entirely at specific places.
The crests of one wave line up with the troughs of another wave when waves interact destructively.
Due to the individual waves' displacements being in opposition to one another as a result of this alignment, the net displacement is zero or has a small amplitude.
The superposition principle, which states that when two or more waves collide at a location in space, the resulting displacement is the sum of the individual displacements of each wave at that point, is what causes the destructive interference event.
Thus, the correct option is C.
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Your question seems incomplete, the probable complete question is:
Which type of wave interaction is shown in the diagram?
A. Constructive interference.
B, Diffraction interference.
C. Destructive interference.
A hoist lifts a 1200 N object a vertical distance of 15 m in 15 s. 18,000 J of work is done on the object to raise it at a constant speed. How much power is generated?
Answer:
1,200 W
Explanation:
18,000 J / 15s = 1,200 W
Which statement describes the heat that results from the radioactive decay of elements deep in the Earth's interior?
Answer:
Try C as the answer, if it works do the thanks button! :D
Explanation:
C) It drives the convection currents in the mantle.
The radioactive decay of elements in the Earth's mantle and crust results in production of daughter isotopes and release of neutrinos and heat energy.The radioactive decay in Earth's crust and mantle continuously adds heat and slows the cooling of the Earth.The heat from radioactive decay is thought to be distributed in the crust and mantle layers of the planet, greatly influencing currents in the mantle.Learn more:
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1
1 point
Which of the following is a true statement about light?
Light cannot be wave and a particle.
Light travels at the same speed as a really loud sound.
Light waves must have a medium in which to transfer energy
Light travels at 3.0 x 108 m/s in a vacuum.
Answer:
Light travels at 3.0 x 108 m/s in a vacuum.
Explanation:
Light travels at 3.0 x 108 m/s in a vacuum.
the diameter of the moon is _____ that of the earth
answers:
2/3
1/4
1/2
1/3
Answer:
2,158.8 mi?
Explanation:
sorry if this is wrong
Emma has a remote control toy quadcopter. She flies it but immediately loses sight of it. She knows it only flew for 2 minutes in a straight line before landing on the ground. Which of the following would best help her locate the missing toy?
A. weight of quadcopter
B. velocity of quadcopter
C. distance of flight
Answer:
C Distance
Explanation:
If she knows how far the plane went then she just goes that far from where it took off