Answer:
T....................
a horizontal string is stretched between two points a Distance 0.80 metre apart the tension in the string is 90 Newtonand it is mass is 4.5 g calculate the wavelength and frequency of the three lowest frequency modes of vibration of the string
Answer:
a) v = 126.5 m / s, b) λ₁ = 1.6 m, λ₂ = 0.8 m, λ₃ = 0.533 m, f1 = 79 Hz,
λ₂ = 0.8 m, f₃ = 237 Hz
Explanation:
This is an exercise we are going to solve in parts, let's start by looking for the speed of the wave in the string.
v = [tex]\sqrt { \frac{T}{ \mu } }[/tex]
the rope tension is T = 90 N and the density can be calculated
μ = m / l
let's calculate
μ = 4.5 10⁻³ / 0.80
μ = 5.625 10⁻³ kg/m
let's calculate the speed
v = [tex]\sqrt{ \frac{90 }{5.625 \ 10^{-3}} }[/tex]
v = 126.5 m / s
For the second part there is a process of resonance in the string. The points where it is attached are nodes so, if L is the length of the chord
L = ½ λ 1st harmonic
L = 2/2 λ 2nd harmonic
L = 3/2 λ 3rd harmonic
L = n/2 λ n harmonic
the wavelength of the first three harmonics is requested
let's calculate
λ₁ = 2L
λ₁ = 2 0.8
λ₁ = 1.6 m
λ₂ = L
λ₂ = 0.8 m
λ₃ = ⅔ L
λ₃ = ⅔ 0.8
λ₃ = 0.533 m
To calculate the frequency we use that the speed is related to the wavelength and the frequency
v = lam f
f = v / lam
we calculate
f1 = 126.5 / 1.6
f1 = 79 Hz
f2 = 126.5 / 0.8
f2 = 158 Hz
f3 = 126.5 / 0.533
f3 = 237 Hz
Plzzzz help the question that are selected in the picture r not correct PLZZ help PLZZ give the answer I will mark u the brainliesst
Answer:
D for the first one and A for the second.
Explanation:
Hurricanes are usually caused by warmer waters.
Wind is created due to the movement of air because of the temperatures.
what’s the answer ???
Answer:
i cant even see it
Explanation:
please can someone please help me with this!!
i’ll give 15 points!!
Answer:
Explanation:
Time is a major factor in how much force is being applied. so when there are crumple zones. they crumple and that takes a little longer in an impact and hence lowers the forces considerably :) safety first
Four resistors , R1=12ohms, R2= 15 ohms , R3= 18 ohms and R4=10 ohms are connected to 6 v battery in series what is the total resistance in the circuit?
Answer:
55 ohms
Explanation:
if it was series circuit, then you just need to add all the resistances
Calculate What is the change in speed of the P
wave as it goes from the mesosphere to the outer
core? From the outer core to the inner core?
lithc
asthenosphere
1) Radiation from the sun can be deflected or contained by
(a) wearing dark colored clothes
(b) wearing light colored clothes
(c) wearing no clothes
(d) wearing blue jeans
The subject is science: Heat Energy
Answer:
b
Explanation:
light colors deflect ligjt
How does convection current helps cooling the system of engines
A bicycle has a momentum of 25.00 kg·m/s and a velocity of 2.5 m/s. What is the bicycle’smass?
Answer:
10 kg
Explanation:
p=ma
25=2.5m
m=25/2.5
m=10 kg
mark as brainliest plzzzzz
Spherical mirror is a
Answer:
Spherical mirror is a mirror with a curved reflecting surface.
There are two spherical mirrors -
Concave andConvexConcave Mirror - A spherical mirror , whose reflecting surface is curved inwards , that is , faces towards the centre of the sphere , is called concave mirror.
Cnovex Mirror - A spherical mirror whose reflecting surface is cirved outwards is called convex mirror.
Explanation:
Points of difference :
The reflecting surface of the concave mirror is bulged inwards . But the reflecting surface of the convex mirror is bulged outwards.Concave mirror produces real and inverted images ( except when the object is placed between F and P , concave mirror produces virtual and erect image ) . But is convex mirror always produces virtual and erect images.The image formed by the concave mirror may be enlarged or diminished, according to the position of the object. The image formed by convex will be always diminished.Select the correct answer.
Anna will wear a black dress when she attends her cousin's wedding. Which color(s) does the dress absorb?
O A.
all colors
B.
no colors
Ос.
red and green
OD. white
Answer:
B
Explanation:
B
Which of the following best describes how the ocean convection cycle impacts different climates?
A by creating different sea levels
B by adding moisture to the atmosphere
by transferring heat from the tropics to the colder climates
by transferring plankton and other sea organisms from cold regions to warm regions
Answer:
Its C
Explanation:
I looked it up and it said that it tranfers heat to the land.
A boy of mass 50 kg walks up a staircase of 10 steps each 15 cm high. Calculate the work done.
Answer:
735 J
Explanation:
Total height reached(displaced)=10x15 cm
= 10 x 15/100 m
= 1.5 m
Workdone = F.S (force x displacement)
Here, the boy is traveling against the gravitation force(=mg) , and traveled a height of 1.5m
Hence,
Workdone = 50 x 9.8 x 1.5 J
= 735 J
Answer:
750J
Explanation:
Solution;
M=50kg, g=10m/s
Distance=15×10÷100
=1.5m
W=M×g×h
=50×10×1.5
=750J
The net force of a heavy, stationary box is?
Answer:
gravity
Explanation:
An example of any movement showing at least four different energy transformations
How can you separate chalk from
chalky water?
Answer:
Yes
Explanation:
Because the call can evaporate from the water.
Answer:
A centrifuge is utilized to isolated little sums of strong held in suspension from the fluid. For case, chalk from water. The centrifuge contains test-tubes that are spun around at tall speed that causes the strong to sink to the foot of the tube. The fluid is the tapped (poured off) clearing out the strong behind.
A 4400 Kg Track Travelling at Intial speed 52m\s can be stopeed in 42 sec. By Gently Break , also the track can be stoped in 7.6 m\s if the driver hit the wall
Answer:
-4,651.42N
Explanation:
Since we are not asked what to find, we can calculate the force applied by the track as shown;
F = ma
F = m(v-u)/t
Substitute the given value
F = 4400(7.6-52)/42
F = 4400(-44.4)/42
F = -4,651.43N
Hence the required force is -4,651.42N
What type of reaction is shown in the following chemical equation: 2H20 - 2H2 + O2?
a
Oь
о Oc
Od
single-displacement
decomposition
double-displacement
synthesis
Answer:
This is a Synthesis Reaction I believe.
Answer:
the reaction is a synthesis reaction
In a free body diagram all the forces are depicted as pointing _______ the central box
Answer:
There are three forces acting upon the system - the gravity force (the Earth pulls down on the 15.0 kg of mass), the normal force (the floor pushes up on the system to support its weight), and the applied force (the hand is pushing on the back part of the system).
Explanation:
Answer:
what he said
Explanation:
HELP FAST What is voltage, and what is its relationship to amperage and power?
(10 points)
Answer:
Amperage is the rate of electrical charge per time.
1 amp = 1 coulomb / second
Power is the product of amperage and voltage.
P = IV
Explanation:
Help ASAP I’ll give u branliest!! This isn’t really hard
Answer:
I'm pretty sure it's mist, drizzle, droplet, and then rain.
What made ancient Rome special?
Answer:
Rome became the most powerful state in the world by the first century BCE through a combination of military power, political flexibility, economic expansion, and more than a bit of good luck. This expansion changed the Mediterranean world and also changed Rome itself.
Explanation:
A current of 27 flows through a filament lamp when potential difference of Vis applied across How many electrons will move through the lamp in a time of 1 hour?
Answer:
6.075×10²³ Electrons
Explanation:
From the question,
Q = it............................. Equation 1
Where Q = quantity of charge, i = current, t = time.
Given: i = 27 A, t = 1 hours = 1×60×60 = 3600 seconds.
Substitute these values into equation 1
Q = 27×3600
Q = 97200 C.
If, one electron = 1.6×10⁻¹⁹ C,
Therefore, n electron = 97200×1/1.6×10⁻¹⁹ C.
n = 6.075×10²³ Electrons
A box moves 1000 m horizontally as a force F 2000 N is applied downward. What is the work done on the box by F during the displacement?
Answer:
D. OJ
Explanation:
Convert 75kg to joules
20 A measure of the speed and direction of an object's motion
a. velocity
b. speed.
c. momentum
why can many ecosystems exit in one biome?
Answer:
Plants and animals that live in a biome must be able to live and reproduce in the conditions
Explanation:
A saw blade, starting at rest, accelerates at 27 rad/s^2 for 5.0 seconds
a. What angular speed will the blade have at the end of the 5.0 seconds
b. If the blade continues at the speed that was reached in part a, through what angle will the blade have rotated in another 5.0 seconds
Two 15 N forces in same directions are acting on an object. What is the magnitude of the net force?
Answer:
30N
Explanation:
if it is pushing the object to the left then it would be 30N left and if it is pushing the object to the right it would be 30N right
Answer: 30N
Explanation:
Suppose A = B"Cm, where A has the dimensions LT, B has dimensions L²T-1, and C has dimensions LT2. Then the exponents n and have the values
Complete Question:
Suppose [tex]A = B^n C^m[/tex], where A has the dimensions LT, B has dimensions L²T⁻¹, and C has dimensions LT². Then the exponents n and m have the values
Answer:
The value of n = ¹/₅
The value of m = ³/₅
Explanation:
Given dimensions;
A = LT
B = L²T⁻¹
C = LT²
The values of n and m are calculated as follows;
[tex]LT = [L^2T^{-1}]^n[LT^2]^m\\\\L^1T^1 = [L^{2n}T^{-n}]\times [L^mT^{2m}]\\\\L^1 \times T^1 = [L^{(2n+m)}] \times [T^{(-n +2m)}]\\\\1 = 2n + m -----(1)\\\\1 = -n + 2m ----(2)\\\\from \ (1); \ m = 1-2n, \ \ substitute \ the \ value \ of \ m \ in\ (2)\\\\1= -n +2(1-2n)\\\\1 = -n + 2-4n\\\\1-2 = -5n\\\\-1 = -5n\\\\1= 5n\\\\n = \frac{1}{5} \\\\m = 1 - 2n\\\\m = 1 - 2(\frac{1}{5} )\\\\m = 1- \frac{2}{5} \\\\m = \frac{3}{5}[/tex]