Answer:
The wave moves with a velocity of 37.5 m/s
Explanation:
We know that the speed of a wave is given by:
V = f*λ
Where f is the frequency (the inverse of the period)
Then:
f = 1/T
And we know that T = 2 s/cycle
f = 1/(2 s/cycle) = (1/2) cycle/s
And λ is the wavelength, we know that:
λ = 75m/cycle.
Then the speed of the wave is:
v = ( (1/2) cycle/s)*(75m/cycle) = (75/2) m/s = 37.5 m/s
how are dams made do they just freeze time?
Answer:
Gravity dams are so named because they are held to the ground by gravity – they weigh a lot, and are typically made from concrete or stone. Engineers must de-water the river where the dam is meant to be built. This is done by diverting the river through a tunnel that runs around the intended construction zone.
Answer:First, they dug tunnels from below the dam to above the dam. Then, they put the cofferdam in place, and opened the tunnels. The water flowed around the site where the permanent dam would be built until they were done, at which point the cofferdam was removed.
Explanation:hope this helped
A particle A of mass 2kg originally moving with a velocity of 3ms collides directly with another particles B of mass 2kg moving with a velocity of 2ms in the opposite direction so that the velocity of A become 1ms after impact . Find the velocity of B after the impact.
Answer:
- 1 m/s ( here (-) means the opposite direction of A)
Explanation:
Let m1=2kg, m2=2kg,u1= 3m/s,u2= -2 m/s, v1= 1m/s
m1u1+m2u2= m1v1+m2v2
2×3+2×(-2) = 2×1 + 2x
2= 2(1+x)
x = -1
Hope it helps
What is the Underground water
Answer:
water found underground is called undergroundwater
A thin rod of length 0.75 m and mass 0.42 kg is suspended
freely from one end. It is pulled to one side and then allowed to swing
like a pendulum, passing through its lowest position with angular
speed 4.0 rad/s. Neglecting friction and air resistance, find (a) the
rod's kinetic energy at its lowest position and (b) how far above that
position the center of mass rises.
Answer:
a) K = 0.63 J, b) h = 0.153 m
Explanation:
a) In this exercise we have a physical pendulum since the rod is a material object, the angular velocity is
w² = [tex]\frac{m g d}{I}[/tex]
where d is the distance from the pivot point to the center of mass and I is the moment of inertia.
The rod is a homogeneous body so its center of mass is at the geometric center of the rod.
d = L / 2
the moment of inertia of the rod is the moment of a rod supported at one end
I = ⅓ m L²
we substitute
w = [tex]\sqrt{\frac{mgL}{2} \ \frac{1}{\frac{1}{3} mL^2} }[/tex]
w = [tex]\sqrt{\frac{3}{2} \ \frac{g}{L} }[/tex]
w = [tex]\sqrt{ \frac{3}{2} \ \frac{9.8}{0.75} }[/tex]
w = 4.427 rad / s
an oscillatory system is described by the expression
θ = θ₀ cos (wt + Φ)
the angular velocity is
w = dθ /dt
w = - θ₀ w sin (wt + Ф)
In this exercise, the kinetic energy is requested in the lowest position, in this position the energy is maximum. For this expression to be maximum, the sine function must be equal to ±1
In the exercise it is indicated that at the lowest point the angular velocity is
w = 4.0 rad / s
the kinetic energy is
K = ½ I w²
K = ½ (⅓ m L²) w²
K = 1/6 m L² w²
K = 1/6 0.42 0.75² 4.0²
K = 0.63 J
b) for this part let's use conservation of energy
starting point. Lowest point
Em₀ = K = ½ I w²
final point. Highest point
Em_f = U = m g h
energy is conserved
Em₀ = Em_f
½ I w² = m g h
½ (⅓ m L²) w² = m g h
h = 1/6 L² w² / g
h = 1/6 0.75² 4.0² / 9.8
h = 0.153 m
If a car is traveling at a speed of 65 miles per hour, how can this be rewritten as a velocity?
Answer:
i.e 65 mph, and a direction, say "east'.
Explanation:
Should there be a salary cap for professional athletes?
answer:
From the fan side: Salary caps mean better competition and more parity between all teams in a given league (in theory, anyway). Salary caps in the NFL, NBA and NHL can foster this, but in MLB, luxury tax requirements may not be enough to prevent large-market teams from dominating.
plz mark me as brainliest plzzzz
As the Moon revolves around the Earth, it also rotates on its axis. Why is it that the same side of the Moon is always visible from Earth?
Answer: The speed of the moon's rotation keeps the same side always facing Earth.
Explanation: Please mark me brainiest
Answer:
The speed of the Moon's rotation keeps the same side always facing Earth.
Explanation:
got it right on study island :)
Sarah is a 30 year old white female. Her occupation is part time chef. She is recently been divorced and has custody of
her three children. She has extreme changes in her mood that began to appear in her 20's but she never went to
see a
doctor about them. When family tries to talk to her about her upset, she reacts by becoming angry and blaming them
for her situation. She is currently complaining of crying episodes, not eating, headaches, thinking she is a failure,
spending most of her time in bed, and not being interested in activities she once enjoyed doing with her kids, such as
going to the park and seeing movies. Her mother and grandfather also showed signs of mental illness and she
reported that her mom has taken Depakote before, which helped. Sarah wants to open her own restaurant and move to
a bigger house.
1. Please answer the following questions by referring to the above case study and the assigned reading for this
unit:
• What psychological and physical symptoms does Sarah present with?
. What is the primary psychological disorder diagnosis that fits her symptoms based on the disorders
described in the textbook?
Answer:
how to deal with devoirce
Explanation:
The psychological and physical symptoms that Sarah presents include:
She frequently has headaches.She also has a loss of appetite.She gets angry easily.From the information given, we can infer that some of the symptoms include the fact that Sarah frequently has headaches, loss of appetite, and gets angry easily.
The primary psychological disorder diagnosis that fits her symptoms based on the disorders will be depression. She's depressed because she just got divorced. This has taken a toll on her health.
Read related link on:
https://brainly.com/question/19276767
Quia
Active
16:05:5
A plant root is an example of
Answer:A plant root is an example of an organ
Explanation:The main function of the root is to collect nutrients and water from the soil.
Answer:
hi sorry i just want points YOSHIII :3
Explanation:
A 100 V battery is connected across a resistor and causes a current of 5mA to flow. Determine
the resistance of the resistor. If the voltage is now reduced to 25 V, what will be the new value
of the current flowing?
Answer:
R = 20000 ohms
I = 1.25 mA
Explanation:
From the question,
V = IR................... Equation 1
Where V = Voltage, I = Current, R = Resistance.
Make R the subject of the equation
R = V/I............... Equation 2
Given: V = 100 V, I = 5 mA = 0.005 A
Substitute into equation 2
R = 100/0.005
R = 20000 ohms.
If the Voltage is reduced to 25 V,
I = V/R.................. Equation 3
Given: V = 25 V, R = 20000 ohms.
Substitute these values into equation 3
I = 25/20000
I = 1.25 mA
3. When a magnetic sector instrument was operated with an accelerating voltage of 4.50*103 V, a field of 0.251 T was required to focus the CH4 on the detector. a) What range of field strengths would be required to scan the mass range between 12.5 and 2.50*102 , for singly charged ion, if the accelerating voltage is held constant
Answer:
The answer is "[tex]4,500 - 225 \ V[/tex]".
Explanation:
Using formula for calculating the Voltage:
[tex]M_1=12.5\\\\M_2=250\\\\V_1=4,500 \\\\\bold{\text{Formula: }}\\\\\to \bold{\frac{m_1}{m_2}=\frac{V_2}{V_1}}\\\\\to \frac{12.5}{250}=\frac{V_2}{4,500}\\\\\to 0.05=\frac{v_2}{4,500}\\\\\to 0.05\times 4,500= V_2\\\\\to V_2=225\\\\[/tex]
Hence the range of accelerating in voltage is [tex]4,500 - 225 \ V[/tex]
Pls help will give brainlist
. Name two ways to decrease the electric force between two charged object
Answer:
breaking the circuit
Explanation:
What question were you trying to answer in this study?
A. Why are the lightbulbs exploding?
B. Why are the lightbulbs melting?
C. Why are the lightbulbs so dim?
D. Why are the lightbulbs burning out?
Which particles
are
electrically neutral?
А
electrons
B
protons
C
neutrons
D
all of the above
For flocabulary
Answer:
C. Neutrons
Explanation:
Protons +
Electron -
in the early solar system,comets that struck earth may have brought in
A.water
B.advanced life
c.plankton
D.all of the above
[tex]\huge{\mathbb{\tt { QUESTION↓}}}[/tex]
In the early solar system,comets that struck earth may have brought in
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {A.water}}}[/tex]
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {B.Advanced Life}}}[/tex]
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {C.Plankton}}}[/tex]
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {D. All \: of \: the \: above}}}[/tex]
[tex]\huge{\mathbb{\tt { ANSWER↓}}}[/tex]
[tex]\color{red}{\tt {D. \: All \: of \: the \: above}}[/tex]
[tex]\color{black}{\tt {because \: the \: true \: answer \: is \: comet}}[/tex]
[tex]{\boxed{\boxed{\tt{WHAT \: IS \: COMET?}}}}[/tex]
[tex]\color{black}{\tt{A \: comet \: is \: an \: icy, \: small \: Solar \: System \: body}}[/tex]
[tex]\color{black}{\tt { that, \: when \: passing \: clos \: e to}}[/tex]
[tex] \color{black}{\tt {the \: Sun, \: warms \: and \: begins \: to \: release}}[/tex]
[tex]\color{black}{\tt { gases, \: a \: process \: that \: is \: called \: outgassing. }}[/tex]
[tex]\color{black}{\tt{This \: produces \: a \: visible \: atmosphere \: or \: coma,}}[/tex]
[tex]\color{black}{\tt{and \: sometimes \: also \: a \: tail}}[/tex]
#CarryOnLearning
#LetsEnjoyTheSummer
→XxKim02xXHELP QUICK! Please can anyone do the other half for me
Answer:
9) c
10) c
11) d
12) d
Explanation:
I think it's helps you
the equation of a progressive
by y=0.02 sin2π/0.5 (320t - x) where x and y are in
meters and t is in second
find the
il amplitude
i frequency
wavelengths
velocity of the Progress in
waveم ا )
Answer:
Amplitude = 0.02m
Frequency = 640 Hz
Wavelength, λ = 0.5m
v = 320 m/s
Explanation:
Given the wave equation :
y=0.02 sin2π/0.5 (320t - x) where x and y are in
meters and t is in second
Comparing the above relation with the general wave equation :
y(x, t) = Asin2π/λ(wt - kx)
The amplitude, A = 0.02
From the equation :
2π/0.5 = 2π/λ
λ = 0.5 m
320t = vt
Hence, v = 320 m/s
Recall :
v = fλ
320 = f * 0.5
f = 320 / 0.5
f = 640 Hz
The sky diver travels download at a speed of 56m/s for 40s calculate the distance travelled during this time. use the equation distance travelled= speed x time
What does weathering do?
2. What does erosion do?
3. What is physical weathering?
4. what are 3 examples of physical weathering?
5. What is chemical weathering?
6. What are 2 examples of chemical weathering?
7. What is biological weathering?
8. What are 3 examples of biological weathering?
Answer
Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away.
Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. A similar process, weathering, breaks down or dissolves rock, but does not involve movement.
Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. ... Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.
Swiftly moving water. Rapidly moving water can lift, for short periods of time, rocks from the stream bottom. ...
Ice wedging. Ice wedging causes many rocks to break. ...
Plant roots. Plant roots can grow in cracks.
the erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes.
Carbonation. When you think of carbonation, think carbon! ...
Oxidation. Oxygen causes oxidation. ... or
Hydration. This isn't the hydration used in your body, but it's similar. ...
Biological weathering is weathering caused by plants and animals. Plants and animals release acid forming chemicals that cause weathering and also contribute to the breaking down of rocks and landforms. Chemical weathering is weathering caused by breaking down of rocks and landforms.
Burrowing animals like shrews, moles, earthworms, and even ants contribute to biological weathering. ...
When animals like birds forage for seeds and earthworms, they create holes and erode the upper surface of the soil, thus, contributes to weathering.
rabbits and other burrowing animals can burrow into a crack in a rock, making it bigger and splitting the rock. You may have seen weeds growing through cracks in the pavement.
Explanation:
Hope this helps you!!
A sample of aluminum has a mass of 4.86 grams and a volume of 1.8 cubic centimeters. What is the density of aluminum rounded to the nearest tenth? 2.7 g/cm³
Answer:
3g/cm³
Explanation:
2.7
The seven adds 1 to the 2 making it 3.0
Answer:
its A
Explanation:
A bird sits on a uniform rod suspended from vertical wires P and Q.
i
x !
'
v
P a
1
not to scale
15.0 cm
2W
The rod has a weight J’ and is 15.0 & long.
The weight of the bird is 2’ and acts at a distance x from P.
What is the value of x when the tension in P is half the tension in Q?
[1 mark]
A 7.50 cm [=]
B 10.0cm [e]
Cc 13cm fe]
D 15.0cm [e]
!
give 3 uses of mirrors in everyday life
Answer:
Putting on makeup lol
Driving
Magnification and Science
Photography
Explanation:
I did an extra one if the makeup one wasn't allowed hahah
Which diagram best represents the electric field around a negatively charged conducting sphere? (See pic)
The diagram which represents the electric field around a negatively charged conducting sphere is: Image D.
What is an electric charge?An electric charge can be defined as a fundamental, physical property of matter, that typically governs how particles are affected by an electric field or electromagnetic field, especially due to the presence of an electrostatic force.
The electric field around a negatively charged conducting sphere are all attracted to the sphere in accordance with the law of electrostatic forces, as depicted by Image D in the given diagram.
Read more on charge here: brainly.com/question/4313738
A flywheel having constant angular acceleration requires 4.00 ss to rotate through 164 radrad . Its angular velocity at the end of this time is 106 rad/srad/s . Find the angular velocity at the beginning of the 4.00 ss interval; the angular acceleration of the flywheel. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Rotation of a bicycle wheel.
Answer:
[tex]\omega '=-13.5rad/s[/tex]
Explanation:
From the question we are told that:
Time [tex]t=4sec[/tex]
Angular displacement [tex]\theta= 161 rad[/tex]
Final Angular velocity [tex]\omega = 100 rad / s[/tex]
Let
Angular acceleration [tex]\alpha[/tex]
Generally the equation for Initial Angular velocity [tex]\omega '[/tex] is mathematically given by
[tex]-\omega '^2=2 \alpha \theta -\omega^2[/tex]
[tex]\omega '^2= \alpha 328 +11236[/tex]
Also,Initial Angular velocity [tex]\omega '[/tex] is mathematically given by
[tex]\omega '=\omega - \alpha t[/tex]
Therefore substitution
[tex]-\omega '^2=2 \alpha \theta -\omega^2[/tex]
[tex]\omega '=\omega - \alpha t[/tex]
[tex](\omega - \alpha t)^2=2 \alpha \theta -\omega[/tex]
[tex]-16\alpha^2+848\alpha+11236= \alpha 328 -11236[/tex]
[tex]16\alpha^2-520\alpha=0[/tex]
[tex]\alpha=29.875rads/s^2[/tex]
Substitution in the 2nd equation for Initial Angular velocity [tex]\omega '[/tex]
[tex]\omega '=106-(29.875rads/s^2*4)[/tex]
[tex]\omega '=-13.5rad/s[/tex]
How is the gravity between two objects affected by their masses?
Answer:
Objects with greater mass have a stronger force of gravity between them. Objects that are closer together have a stronger force of gravity between them.
Explanation:
Newton's law states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them.
ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP
Answer:
I don’t know what that is I’m sorry
Explanation:
Answer:
tbh i wish i can help
Explanation:
Dolphins emit clicks of sound for communication and echolocation. A marine biologist is monitoring a dolphin swimming in seawater where the speed of sound is 1522 m/s. When the dolphin is swimming directly away at 8.0 m/s, the marine biologist measures the number of clicks occurring per second to be at a frequency of 2500 Hz. What is the difference (in Hz) between this frequency and the number of clicks per second actually emitted by the dolphin
Answer:
13 hz
Explanation:
Speed of sound = 1522
Dolphin swims off at 8.0 = Cs
Frequency of clicks = Fo = 2500
Fo = fs(c/c+cs)
2500 = fs(1522/1522+8)
2500 = fs(1522/1530)
2500 = 0.99477fs
Fs = 2500/0.99477
= 2513.1
From here, we find the difference between this frequency and the number of clicks per second
= 2513.1 - 2500
= 13.1 hz
Approximately 13 Hz
∁=f
E=hf
c=3x108m/s h=6.63x10-34 J*s
The spectrum of Hydrogen is in the picture below.
ShapeWrite their wavelength (m), frequency (Hz), speed (m/s), and energy (J).
ShapeShapeShape
wavelength
frequency
speed
energy
404x10-9m
4.04x10-7m
7.42x1014 Hz
3x108 m/s
4.92x10-19J
447 nm à ______________ m à f=_______________________ à E= __________________
471 nm à ______________ m à f=_______________________ à E= __________________
501 nm à ______________ m à f=_______________________ à E= __________________
587 mm à ______________ m à f=_______________________ à E= __________________
667 mm à ______________ m à f=_______________________ à E= __________________
2.56 m à ______________ m à f=_______________________ à E= __________________
Answer:
so you have a question
Explanation:
either way have a nice day
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly six months, as measured by a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have advanced exactly 90 years into the future. According to special relativity, how fast must you travel
Answer:
v = 0.99 c = 2.99 x 10⁸ m/s
Explanation:
From the special theory of relativity:
[tex]t = \frac{t_o}{\sqrt{1-\frac{v^2}{c^2} } }\\[/tex]
where,
v = speed of travel = ?
c = speed of light = 3 x 10⁸ m/s
t = time measured on earth = 90 years
t₀ = time measured in moving frame = 6 months = 0.5 year
Therefore,
[tex]90\ yr = \frac{0.5\ yr}{\sqrt{1-\frac{v^2}{c^2} } } \\\\\\\sqrt{1-\frac{v^2}{c^2}} = \frac{0.5\ yr}{90\ yr}\\ 1-\frac{v^2}{c^2} = 0.00003086\\\frac{v^2}{c^2} = 1-0.00003086\\[/tex]
v = 0.99 c = 2.99 x 10⁸ m/s