Answers
The freqency of the wave of wavelength 3.6 m is 5.56 Hz
What is frequency?The frequency of a wave is the ratio of the speed and its wavelength.
To calculate the frequency of the wave, we use the formula below.
Formula:
v = λf........................ Equation 1Where:
v = Speed of the waveλ = Wavelengthf = FrequencyFrom the question,
Given:
v = 20 m/sλ = 3.6 mSubstitute thse values into equation 1 and solve for f
20 = 3.6ff = 20/3.6f = 5.56 HzHence, the freqency of the eave is 5.56 Hz
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Related Questions
A red 8-kg ball that is going 3-m/s collides with a 2-kg blue ball that is at rest. The blue
ball then goes 6-m/s. What is the red ball's speed?
Answers
Answer:
Explanation:
Given:
m₁ = 8 kg
V₁ = 3 m/s
m₂ = 2kg
V₂ = 0
V₂' = 6 m/s
__________
V₁' - ?
m₁V₁ + m₂V₂ = m₁V₁' + m₂V₂'
8·3 + 2·0 = 8·V₁' + 2·6
24 = 8·V₁' + 12
24 - 12 = 8·V₁'
12 = 8·V₁'
V₁' = 12 / 8 = 1.5 m/s
What does the cosmological principle allow cosmologists to assume?
A. Exactly what the specific fate of the universe will be and when
B. The galaxies are organized clusters of billions of stars, gas, dust, and matter in all other forms.
C. That the small portion of the space we can see is truly representative of all the rest of the universe that we cannot see.
D. How the helium clouds impact human health and life expectancy.
Answers
Answer:
C. That the small portion of the space we can see is truly representative of all the rest of the universe that we cannot see.
Explanation:
The Cosmological Principle assumes that the small portion of the universe that we can see is representative of the entire universe, even though we can only directly observe a tiny fraction of it. It's an assumption used by Cosmologists to simplify their models of the universe.
If an object is accelerating at a rate of 8 m/s^2 what is the mass of the box.
See attached
Answers
Answer:
50 kg
Explanation:
fnet=ma
600-200=m8
divide both side by 8 to make m the subject of the formula Thus m=50kg
The speed of a box traveling on a horizontal friction surface changes from vi = 13 m/s to vf = 11.5 m/s in a distance of d = 8.5 m. If the box has a mass of 1 kg, what is the average power supplied to the box by friction while it slows from 13 m/s to 11.5 m/s?
Answers
The average power supplied to the box by friction while it slows from 13 m/s to 11.5 m/s is 3.24 W.
Acceleration of the box
The acceleration of the box is calculated as follows;
vf² = vi² + 2as
a = (vf² - vi²)/2s
a = (11.5² - 13²) / (2 x 8.5)
a = -2.16 m/s²
Time of motion of the boxThe time taken for the box to travel is calculated as follows;
a = (vf - vi)/t
t = (vf - vi) / a
t = (11.5 - 13) / (-2.16)
t = 0.69 s
Average power supplied by the frictionP = Fv
P = (ma)(vf - vi)
P = (1 x -2.16) x (11.5 - 13)
P = 3.24 W
Thus, the average power supplied to the box by friction while it slows from 13 m/s to 11.5 m/s is 3.24 W.
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Why dose a patient receive more radiation from a CT scan than than from having a X-ray image made
Answers
Answer:
A CT scan involces multiple X-Ray images
Explanation:
A patient receives more radiation from a CT scan than from having an X-ray image made because a CT scan involves multiple X-ray images. Thus, option A is correct.
What is a CT scan?A computed tomography scan is a type of medical imaging procedure used to produce in-depth pictures of the body's inside. The individuals who perform CT scans are known as radiologists or radiography technologists.
Identify conditions affecting the muscles and bones, such as bone cancers and fractures. Identify a tumor, an infection, or a blood clot's precise site. Surgical, biopsied, and radiation therapy guidelines Find and keep an eye on problems and illnesses like cancer, heart disease, lung nodules, and liver masses.
A patient receives more radiation from a CT scan than from having an X-ray image made because a CT scan involves multiple X-ray images. Thus, option A is correct.
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Your question is incomplete, most probably the full question is this:
Why does a patient receive more radiation from a CT scan than from having an X-ray image made?
A. A CT scan involves multiple X-ray images.
B. Higher-frequency rays are used in a CT scan.
C. Fewer X-rays are reflected in a CT scan.
D. X-rays are more powerful in a CT scan.
Diamagnetic materialsA) have small negative values of magnetic susceptibility.B) are those in which the magnetic moments of all electrons in each atom cancel.C) experience a small induced magnetic moment when placed in an external magnetic field.D) exhibit the property of diamagnetism independently of temperature.E)are described by all
Answers
Answer:
C) experience a small induced magnetic moment when placed in an external magnetic field.
Explanation:
Diamagnetics materials are those that experience a small induced magnetic moment when placed in an external magnetic field. These materials, such as bismuth, copper, silver and lead, have elementary magnets in their compositions. When they are exposed to an external magnetic cap, these elemental magnets tend to follow an orientation contrary to the external magnetic field. As a result, a magnetic field is created in the opposite direction to the external magnetic field.
The diagram shows a charge moving into an electric field. Two horizontal parallel plates have equally spaced vectors going from the bottom plate to the top plate. A negatively charged sphere labeled Z in traveling horizontally in between the plates. A vector is pointing right. The top plate is labeled W. There is an X at the far end of the top plate and a Y at the far end of the bottom plate. The charge will most likely leave the electric field near which letter? W X Y Z
Answers
The negatively charged sphere Z is most likely to leave the electric field near the center of plates, which is closest to letter Y.
What is an electric field?Physical field that surrounds electrically charged particles and exerts force on all the other charged particles in the field is called an electric field.
Negatively charged sphere labeled Z will experience a force due to electric field created by parallel plates. Since the vector is pointing right, we can assume that electric field is also pointing right.
Electric field lines are perpendicular to plates and are equally spaced. Therefore, electric field is uniform in magnitude and direction between the plates.
As the negatively charged sphere Z travels horizontally between plates, it will experience force in the direction opposite to electric field due to its negative charge. This force will cause sphere to slow down and stop.
Since the electric field lines are equally spaced between the plates, electric field will be strongest at the edges of plates and weakest in the center. Therefore, negatively charged sphere Z is most likely to leave the electric field near the center of plates, which is closest to letter Y.
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Consider a pair of planets for which the distance between them is decreased by a factor of 4.
How many times does the force between them increase?
F (after)/ F(before)= ????
Someone please explain this for me!
Answers
Answer: the force will increase 16 times
Explanation:
as the equation of the force is written, it's denominator is the distance squared
\(f = G\frac{m_{1}.{m_{2}}}{r^{2} }\)
so the distance is reduced by a factor of 4 ,the equation becomes\(f = G\frac{m_{1}.{m_{2}} }{{[r/4]}^{2} }\)
now as the distance r is divided by 4 the complete equation is multiplied by 16.
Kinetic and
A brick is resting on a smooth wooden board that is at a 30° angle. What is one way to overcome the static friction that is holding the brick in place?
11 point)
O raise the board to a higher angle
O press down on the brick in a direction that is perpendicular to the board
O roughen up the texture of the wooden board
o lower the board so it's level with the ground
Answers
Answer:
raise the board to a higher angle
Explanation:
Static friction is the force opposite to the applied force.
Static friction is dependent on the angle of inclination, it means as the angle of incline increases, the force of friction will increases as normal force will decrease.
So, if the board will be raised to a higher angle, it will increase the angle of incline and will overcome the static friction and block will be able slide.
Hence, the correct option is "raise the board to a higher angle".
A 3.00-kg crate slides down a ramp. the ramp is 1.00 m in length and inclined at an angle of 30.08 as shown in the figure. The crate starts from rest at the top, experiences a constant friction force of magnitude 5.00 N, and continues to move a short distance on the horizontal floor after it leaves the ramp.
Answers
Answer:
2.55 m/s
Explanation:
A 3.00-kg crate slides down a ramp. the ramp is 1.00 m in length and inclined at an angle of 30° as shown in the figure. The crate starts from rest at the top, experiences a constant friction force of magnitude 5.00 N, and continues to move a short distance on the horizontal floor after it leaves the ramp. Use energy methods to determine the speed of the crate at the bottom of the ramp.
Solution:
The work done by friction is given as:
\(W_f=F_f\Delta S\\\\Where\ F_f\ is\ the \ frictional\ force=-5N(the\ negative \ sign\ because\ it\\acts\ opposite\ to \ direction\ of\ motion),\Delta S=slope\ length=1\ m\\\\W_f=F_f\Delta S=-5\ N*1\ m=-5J\)
The work done by gravity is:
\(W_g=F_g*s*cos(\theta)\\\\F_g=force\ due\ to\ gravity=mass*acceleration\ due\ to\ gravity=3\ kg*9.81\\m/s^2, s=1\ m, \theta=angle\ between\ force\ and\ displacement=90-30=60^o\\\\W_g=3\ kg*9.81\ m/s^2*1\ m*cos(60)=14.72\ J\\\\The\ Kinetic\ energy(KE)=W_f+W_g=14.72\ J-5\ J=9.72\ J\\\\Also, KE=\frac{1}{2} mv^2\\\\9.72=\frac{1}{2} (3)v^2\\\\v=\sqrt{\frac{2*9.72}{3} } =2.55\ m/s\)
12. An organ pipe that is 1.75 m long and open at both ends produces sound of
frequency 303 Hz when resonating in its second overtone. What is the speed of
sound in the room?
295 m/s
328 m/s
354 m/s
389 m/s
401 m/s
Answers
Answer:
354 m/s
Explanation:
For the second overtune (Third harmonic) of an open pipe,
λ = 2L/3................................ Equation 1
Where L = Length of the open pipe, λ = Wave length.
Given: L = 1.75 m.
Substitute into equation 1
λ = 2(1.75)/3
λ = 1.17 m.
From the question,
V = λf.......................... Equation 2
V = speed of sound in the room, f = frequency
Given: f = 303 Hz.
Substitute into equation 2
V = 1.17(303)
V = 353.5
V ≈ 354 m/s
Hence the right answer is 354 m/s
I need help on this what in the world is this
Answers
The net force on charge 3 is 1.8 N.
What is the net force on charge 3?
The net force on charge 3 is calculated by applying Coulomb's law as shown below;
F = kq₁q₂/r²
where;
q₁ is the charge 1q₂ is the charge 2r is the distance between the chargesThe net force on charge 3 is calculated as;
F (net) = F₁₂ + F₂₃
F (net) = ( 9 x 10⁹ x 5 x 10⁻⁶ x 5 x 10⁻⁶ ) / (0.5²) + ( 9 x 10⁹ x 5 x 10⁻⁶ x 5 x 10⁻⁶ ) / (0.5²)
F (net) = 0.9 N + 0.9 N
F (net) = 1.8 N
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In hiking, what fitness component is required of you
Answers
Calculate the net force on the particle q1.
Answers
Answer:
-12.1
Explanation:
i’m almost sure this is it, i’m checking my old answers
if not let me know and i’ll give you some more answers
During the 28-day lunar cycle, the positions of the Sun,
Earth, and the Moon change in relation to one another. The
diagram shows how their relative positions change.
Which statement describes the positions of the Moon, the Sun, and Earth
during a new moon?
A. Earth is closer to the Sun than to the Moon.
B. The Moon is between Earth and the Sun.
C. Earth is between the Moon and the Sun.
D. The Sun is between Earth and the Moon.
Answers
Answer: B
Explanation: B is the correct statement describing the positions of the Moon, the Sun, and the Earth during a new moon. The Moon is between Earth and the Sun.
During a new moon, the Moon is positioned between the Sun and the Earth, with the illuminated side of the Moon facing away from the Earth. This means that the side of the Moon that faces the Earth is not receiving any sunlight, making it invisible to us from Earth. The new moon is the first phase of the lunar cycle and occurs roughly every 29.5 days.
.calculate the mass moment of inertia of unloaded disk (system 1) using the theory. show your calculations below.
Answers
The mass moment of inertia of an unloaded disk can be calculated using the formula I = \((1/2) × m × r^2\), we calculated the mass moment of inertia to be 0.25 \(kg·m^2\).
The mass moment of inertia of an unloaded disk, also known as the polar moment of inertia, can be calculated using the formula:
I = \((1/2) × m × r^2\)
where I is the mass moment of inertia, m is the mass of the disk, and r is the radius of the disk.
Assuming that we have a disk with a mass of 1 kg and a radius of 0.5 m, we can substitute these values into the formula to calculate the mass moment of inertia:
I = \((1/2) × m × r^2\)
I = (1/2) × 1 kg × \((0.5 m)^2\)
I = 0.25 \(kg·m^2\)
This value represents the disk's resistance to rotational acceleration and is an important parameter in many areas of physics and engineering.
Therefore, the mass moment of inertia of the unloaded disk is 0.25 \(kg·m^2\).
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Match the elements with the number of neutrons. (4 points)
1.
88 38 Sr
2.
39 19 Ka
3.
14 6 Carbon
4.
234 90 Thorium plus 4 2 Helium
a.
20
b.
50
c.
8
d.
74
Answers
The following elements are matched with their number of neutrons
1. 88 38 Sr - b. 50
2. 39 19 Ka - a. 20
3. 14 6 Carbon - c. 8
4. 234 90 Thorium plus 4 2 Helium - d. 74
To determine the number of neutrons for each element, we need to subtract the atomic number (which represents the number of protons) from the mass number (which represents the total number of protons and neutrons).
1. 88 38 Sr:
The atomic number of strontium (Sr) is 38, which means it has 38 protons. The mass number is 88. Subtracting the atomic number from the mass number: 88 - 38 = 50. Therefore, the number of neutrons in strontium is 50.
2. 39 19 Ka:
The atomic number of potassium (K) is 19, indicating 19 protons. The mass number is 39. Subtracting the atomic number from the mass number: 39 - 19 = 20. Hence, the number of neutrons in potassium is 20.
3. 14 6 Carbon:
The atomic number of carbon (C) is 6, representing 6 protons. The mass number is 14. Subtracting the atomic number from the mass number: 14 - 6 = 8. Thus, the number of neutrons in carbon is 8.
4. 234 90 Thorium plus 4 2 Helium:
The atomic number of thorium (Th) is 90, which means it has 90 protons. The mass number is 234. Subtracting the atomic number from the mass number: 234 - 90 = 144. However, there is also an additional helium (He) isotope mentioned with a mass number of 4 and atomic number of 2. Adding the number of neutrons from thorium and helium: 144 + 2 = 146. Hence, the number of neutrons in thorium plus helium is 146.
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7. A car is travelling along a road at 30 ms when a pedestrian steps into the road 55 m ahead. The
driver of the car applies the brakes after a reaction time of 0.5 s and the car slows down at a rate of
10 ms. What happens?
Answers
Answer: Car collide with man
Explanation:
Given
Speed of car is \(u=30\ m/s\)
Distance of the man from the car is \(s=55\ m\)
Reaction time \(t_r=0.5\ s\)
Rate of deceleration \(a_d=-10\ m/s^2\)
Distance traveled in the reaction time \(d_o=30\times 0.5=15\ m\)
Net effective distance to cover \(d=55-15=40\ m\)
Distance required to stop the car
\(\Rightarrow v^2-30^2=2(-10)(s)\\\Rightarrow 0-900=-20s\\\Rightarrow s=45\ m\)
Require distance is more than that of net effective distance. Hence, car collides with the man.
compare the times of all sunsets during the same period what do you observe
Answers
Answer:
Theres no given?
Explanation:
Well, whatever.
I observed the shift of their sunset time.
Examples like:
January to June = their sunset time increased while
July to December = their sunset time decreased
You know you can provide 600 W
of power to move large objects. You need to move a 60-kg
safe up to a storage loft, 18 m
above the floor.
Part A
With what average speed can you pull the safe straight up?
Answers
A. The average speed you can use to pull the safe is 1.02 m/s
B. The time needed to pull the safe up is 17.65 s
A. How do i determine the velocity?First, we shall obtain the force. This is shown below:
Mass of safe (m) = 60 KgAcceleration due to gravity (g) = 9.8 m/s² Force (F) =?F = mg
F = 60 × 9.8
F = 588 N
Finally, we shall obtain the average speed. Details below:
Power = 600 WForce = 588 NAverage speed =?Power = force × average speed
600 = 588 × average speed
Divide both sides by 588
Average speed = 600 / 588
Average speed = 1.02 m/s
B. How do i determine the time?The time needed to pull the safe up can be obtained as follow:
Average speed = 1.02 m/sTotal distance = 18 mTime = ?Time = Total distance / average speed
Time = 18 / 1.02
Time = 17.65 s
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Complete question:
You know you can provide 600 W
of power to move large objects. You need to move a 60-kg
safe up to a storage loft, 18 m
above the floor.
Part A
With what average speed can you pull the safe straight up?
Part B
What is the time needed to pull the safe up?
Which of the following demonstrates proper maintenance of a sterile field?
A. Trevor is cold during a surgical procedure and covers his hands
with his cuffs.
B. Sally remains in the operating room at all times and avoids leaning
on tables.
C. Maureen leaves her hands at her side because she knows that
anything below the waist on her scrubs is sterile.
D. Fred drops a scalpel and continues to use it since it was still in the
exam area and therefore is sterile.
SUBMIT
Answers
Answer: B. Sally remains in the operating room at all times and avoids leaning
on tables.
Explanation: took the quiz.
The statement that demonstrates proper maintenance of a Sterile field is Sally remains in the operating room at all times and avoids leaning on tables.
What is a Sterile field?Sterile field refer to a section area that is set apart in order to place sterile surgical drapes on the patient's surgical site and also on the stand that will hold in place the sterile instruments and other items needed during surgery.
The purpose of the sterile field is to minimize the population of microbes.
Therefore, The statement that demonstrates proper maintenance of a Sterile field is Sally remains in the operating room at all times and avoids leaning on tables.
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whitch two options are forms of kinetic energy?
Answers
Answer:the witch has nothing to do with the problem
Explanation:
A car is left overnight in a parking lot. What is its instantaneous speed at 12:01 a.m.?
Answers
Answer:
0 mph
Explanation:
Answer:
0 mph
Explanation:
Which of the following energy resources are replaceable through biogeochemical cycles and also provide clean energy?
a. Geothermal energy
b. Biomass energy
c. Nuclear power
d. Hydropower
Answers
Biomass energy refers to energy that is derived from organic matter, such as wood, crop residues, and even municipal solid waste. This organic matter can be replenished through biogeochemical cycles.
What is organic ?Organic products, such as fruits, vegetables, meat, and dairy, are grown or raised without the use of synthetic chemicals, fertilizers, or hormones. Organic certification is granted by regulatory bodies that ensure that the products meet strict organic standards.
In addition to its benefits for the environment and personal health, organic farming and food production also promote animal welfare and sustainable agriculture practices. However, organic products may be more expensive than conventionally grown products due to the increased cost of production and certification.
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Which light behavior does this reperesent
Answers
Answer:
Refraction
Explanation:
because the pencil looks magnified or distorted in water
Answer:
(B) Refraction
Explanation:
the fact or phenomenon of light being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium.
Hope this helps!! :) (Also there is an example attached :D)
Lab Report
Light
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U4_ Lab_Light_Alice_Jones.doc).
Introduction
1. What was the purpose of the experiment?
Type your answer here:
2. What were the independent, dependent, and control variables in your investigation? Describe the variables for each part of the experiment.
Type your answer here:
Experimental Methods
1. What tools did you use to collect your data?
Type your answer here:
2. Describe the procedure that you followed to collect your data.
Type your answer here:
Data and Observations
1. Record your observations in the data tables.
Type your answer here:
Table 1. Angles of Incidence and Angles of Reflection for a Beam of Light Reflected off a Mirror
Angle of incidence (°) Angle of reflection (°)
Table 2. Angles of Incidence and Angles of Refraction for a Beam of Light Refracted through a Glass Lens
Angle of incidence (°) Angle of refraction (°)
Conclusions
1. Draw a diagram (develop a model) that shows what happens to light when it reflects off a mirror. Look for patterns in your data to help you develop your model. Hint: Is the angle of reflection always greater than, less than, or equal to the angle of incidence? Include labels.
Type your answer here:
2. Use your model to predict the angle of reflection of a beam of light reflected off a mirror if the angle of incidence of the beam of light is 40 degrees.
Type your answer here:
3. Draw a diagram (develop a model) that shows what happens to light when it is refracted through a glass lens. Look for patterns in your data to help you develop your model. Hint: Is the angle of refraction always greater than, less than, or equal to the angle of incidence? Include labels.
Type your answer here:
Answers
Answer:
Explanation:
the answer is b
discribe how standard of meter,second, and kilogram are agreed internationally.
Answers
Answer:
Hindi ko Po alm sorry Po talaga
The Moon is responsible for what % of the tides that we experience?
Answers
Answer: High tides and low tides are caused by the Moon. The Moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the Moon and the side farthest from the Moon. These bulges of water are high tides.
Explanation:
3.) A boat is moving south at 15.0, a passenger is walking north along the boat deck at 4.0 and throws a
rock north at 3.0, what is the velocity of the rock when viewed from the boat and the shore? (2)
Answers
Therefore, the velocity of the rock when viewed from the boat will be:
Vrock (boat) = Vrock (passenger) + Vpassenger (boat)
Vrock (boat) = 3.0 m/s north + (-4.0 m/s south)
Vrock (boat) = -1.0 m/s south
So, when viewed from the boat, the velocity of the rock will be 1.0 m/s south.
When viewed from the shore, the velocity of the rock will be equal to the velocity of the boat relative to the shore (15.0 m/s south) plus the velocity of the rock relative to the boat (which we calculated as -1.0 m/s south).
Therefore, the velocity of the rock when viewed from the shore will be:
Vrock (shore) = Vrock (boat) + Vboat (shore)
Vrock (shore) = -1.0 m/s south + (-15.0 m/s south)
Vrock (shore) = -16.0 m/s south
So, when viewed from the shore, the velocity of the rock will be 16.0 m/s south.
A flowerpot falls from a window sill 34.6 m
above the sidewalk.
What is the velocity of the flowerpot when
it strikes the ground? Choose upwards to be
the positive y direction. The acceleration of
gravity is 9.81 m/s²
Answers
The velocityof the flowerpot when it strikes the ground is 26.04.
What is velocity.
velocity is the prime indicator of the position as well as the rapidity of an object. It can be defined as distances covered by an object in unit of the time. velocity can defined as the displacement of the object in unit of the time .
Sol- As we know when the object is simply falls it's initial velocity is 0.
Therefore u=0
Given question is flowerpot traveled 34.6 before striking the ground.
Therefore s=34.6
We have to find v?
v^2= u^2+2gs
v^2= 0+2gs
v=√2gs
v=√2×9.81×34.6
v=26.04
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