Answer:
your answer would be D because the waves results from back n forth vibrations of the particles of the medium throught which the sound waves is moving .
A sound wave is a type of wave that requires a medium and in which the vibration is parallel to the motion of the sound.
A wave is form of disturbance that transfers energy form one point to another.
There are two types of waves; mechanical wave and electromagnetic wave.
Electromagnetic wave does not require material medium for its propagation.Mechanical wave requires material medium for their propagation.An example of mechanical wave include;
Sound wave is an example of mechanical wave because it requires material medium for its propagation.Sound wave is a also longitudinal type of wave because its vibration occurs parallel to the motion of the sound wave.Thus, we can conclude that a sound wave is a type of wave that requires a medium and in which the vibration is parallel to the motion of the sound.
Learn more here:https://brainly.com/question/15666150
b) Which device is used to measure the weight of a body?
Physical balance
Spring balance
Beam balance
Top-pan balance
Answer:
beam balance
Explanation:
its the most optimal
HELP ME PLEASE AND THANK UUU
Answer:
D.
Explanation:
Work is done when a force moves its point of application a distance in the direction of that force.
Work = force × distance.
Need Help !
A 1500 kg car on flat ground is
moving 5.25 m/s. Its engine
creates a 1250 N forward force as the car moves 42.8 m. What is its final velocity?
Answer: 5.96m/s
Explanation:
Given the following :
Mass of car (m) = 1500kg
Velocity (V) = 5.25m/s
Forward force of engine = 1250N
Diatance moved = 4.8m
Final Velocity =?
Final kinetic energy = Initial kinetic energy + work done by engine
Initial kinetic energy = 0.5 × mass × velocity^2
Initial kinetic energy = 0.5 × 1500 × 5.25^2
Initial kinetic energy = 20671.875 J
Work done by engine = Force × distance
Work done by engine = 1250 × 4.8 = 6000J
Final kinetic energy = (20671.875 + 6000) J
= 26671.875 J
From kinetic energy = 0.5mv^2
26671.875 = 1/2 × 1500 × v^2
53343.75 = 1500v^2
v^2 = 35.5625
v = sqrt(35.5625)
v = 5.96m/s
a solid weighs 18.36N on the surface of the moon. The force of gravity on the moon is 1.7Nkg-1. Determine the mass of the solid
Answer:
mass of the solid is 10.8kg
Explanation:
Weight of the solid=w=18.36N
Force of gravity on the surface of the moon=g=1.71Nkg^-1
Mass of the solid on the moon=m=?
as we know that
weight=mass×force of gravity
here we have to find the mass
[tex]\frac{weight}{force of gravity}[/tex]=mass
mass=[tex]\frac{18.36N}{1.7Nkg^-1}[/tex]
Mass of the solid=10.8kg
i hope it will help you
The estimated distance of the earth from the sun is 149000000km. The speed of the light is 300000km/s. What is the time taken for the light to travel from the sun to the earth
Answer:
The time taken for the light to travel from the earth to the sun = 496.67 seconds
Explanation:
Estimated distance of the earth to the sun = 149000000km
Speed of light = 300000km/s
Time taken for the light to travel from the sun to the earth = ?
Speed = Distance/time
time = Distance/speed
time = 149000000/300000
time = 496.67 s
The time taken for the light to travel from the earth to the sun = 496.67 seconds
The density of pine is generally about 0.5 g/cm3. What is the mass of a 800 cm3 piece of pine
Answer:
400grams
Explanation:
Mass is density × volume
0.5×800= 400 grams
Mass is density × volume
0.5×800= 400 grams.
What does density mean?
Density is the number of things—which could be people, animals, plants, or objects—in a certain area. To calculate density, you divide the number of objects by the measurement of the area. The population density of a country is the number of people in that country divided by the area in square kilometers or miles.
How do we calculate density?
density, the mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume.
Learn more about density here: https://brainly.com/question/1354972
#SPJ2
what is the conservation of momentum?
when light passess from air into glass the angle of incidence is always _______ the angle of refraction
Explanation:
The angle of incidence is always smaller than the angle of refraction
John drives his car 120 miles east in 2 hours, 90 miles east in 1.5 hours, then he stops at the gas station for half an hour. He soon realizes that he has to go back 8 miles west which takes him one hour to reach his final destination. Calculate his average velocity during the entire time.
Answer: 44.9 m/s
Explanation:
Velocity = displacement/time
While displacement is the distance travelled in a specific direction.
The east direction will be positive while the west direction will be negative.
The total displacement will be :
120 + 90 - 8 = 202 miles
While the total time will be:
2 + 1.5 + 1 = 4.5 hours
Half hour time he used in the gas station will not be considered.
Average Velocity = total displacement ÷ total time.
Average velocity = 202/4.5
Average velocity = 44.89 m/s
Average velocity through out the entire time is 44.9 m/s
Look at figure D . Explain what will happen if a larger mass it put on the force meter
it will experience great force
An 18-kg bicycle carrying a 62-kg girl is traveling at a speed of 7 m/s. What is the kinetic energy of the girl
and bicycle combined together?
Answer:
1960 J
Explanation:
EK = (18 kg + 62 kg)[tex](7.0 m/s)^{2}[/tex]/2 = 1960 J
Please helpppp: A caterpillar tries to climb straight up a wall two meters high, but for every 2 cm up it climbs, it slides down 1 cm.
Eventually, it reaches the top. When it reaches the top, it does not pull itself over so it will slide down 1 cm.
In the first box, select the total displacement. In the second box, indicate the direction.
cm
Answer:
The caterpillar is climbing a wall of 2 meters.
the caterpillar climbs 2 cm, and then falls 1 cm, so for each "climb", the caterpillar actually moves 1cm, while the actual distance moved is 3 cm, the displacement is 1cm.
Remember, displacement is equal to the difference between the initial position and the last position.
Now, when the caterpillar reaches the top, it slides down one centimeter, so the final position of the caterpillar is:
2 meters - 1 centimeter, and 1 m = 100 cm
200 centimeters - 1 centimeter = 199 centimeters.
Knowing that the caterpillar started at the ground, at 0 centimeters, then we can find that the difference between the final position and the initial position is:
D = 199cm - 0cm = 199cm
The displacement is 199cm.
The direction is upwards, if we define the y-axis as the vertical axis, the the direction is in the positive y-axis.
what is the principles of electric motor
Answer:
Explanation:
Electric motor: A motor is a device which converts electrical energy into mechanical energy.
Principle of motor : A motor works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it. A force acts on the coil which rotates it continuously.
A 1500 kg car on flat ground is moving 5.25 m/s. Its engine creates a 1250 N forward force as the car moves 42.8 m. What is its final velocity?
Answer:
9.93 m/s
Explanation:
The following data were obtained from the question:
Mass (m) = 1500 Kg
Initial velocity (u) = 5.25 m/s
Force (F) = 1250 N
Distance (s) = 42.8 m
Final velocity (v) =...?
Next, we shall determine the acceleration of car. This can be achieved as shown below:
Force (F) = mass (m) x acceleration (a)
1250 = 1500 x a
Divide both side by 1500
a = 1250/1500
a = 0.83 m/s²
Therefore, the acceleration of the car is 0.83 m/s²
Now, we can determine the final velocity of car as shown below:
Initial velocity (u) = 5.25 m/s
Distance (s) = 42.8 m
Acceleration (a) = 0.83 m/s²
Final velocity (v) =...?
v² = u² + 2as
v² = (5.25)² + 2 x 0.83 x 42.8
v² = 27.5625 + 71.048
v² = 98.6105
Take the square root of both side
v = √98.6105
v = 9.93 m/s
Therefore, the final velocity of the car is 9.93 m/s
Answer:
9.93
Explanation:
too easy, just use a calculator lol
what was the first dogs name that landed on the moon
Answer:
Laika
Explanation:
The dog's name was originally Kudryavka, or Little Curly, but she became known internationally as Laika, a Russian word for several breeds of dog similar to a husky. American reporters dubbed her Muttnik as a pun on Sputnik. Unfortunately, Laika's trip into space was one-way only.
Answer:
Laika
Explanation:
The dog is very cute buut it died i nearly cried
(d)
The circuit is connected for 300 s
The total current in the circuit stays at 0.56 A
Calculate the total charge flow.
Use the equation:
charge flow = current x time
Answer:
168
Explanation:
charge flow= current × time
Q. = 0.56 × 300
PLEASE ANSWER FOR BRAINLIEST!! A guitar string vibrates with a frequency of 4 kHz. What is the period of the waves in seconds?
Answer:
T = 0.00025 secs
Explanation:
Given:
Frequency = 4 kHz = 4000 Hz
Required:
Time Period = ?
Formula:
T = 1/f
Solution:
T = 1/4000
T = 0.00025 secs
Answer:
0.00025 seconds
Explanation:
Time period = 1 / frequency
= 1/4000
= 0.00025 seconds
Hope this helps, and please mark me brainliest if it does!
What is the average speed of the tiger between the times t = 0s and t
= 12 s?
Choose 1 answer:
m
(A
6
S
m
B
-0.33
s
m
S
0.33
S
Answer:
A.6s
Explanation:
Average time=
[tex]average time \: t = \frac{t1 + t2}{2 } \\ \frac{0 + 12}{2} \\ \frac{ 12}{2} \\ t = 6s[/tex]
does anyone know question 6?
Answer:
Yes, the fuse will blow.
Explanation:
We'll begin by converting 50000mA to amperes (A) .this is illustrated below:
1000mA = 1A
Therefore, 50000mA = 50000/1000 = 50A.
From the question given above, the plug can only accommodate 5A. Now if 50000mA i.e 50A is passed through the plug, the plug will blow because the 50A is higher than what the plug can accommodate.
An aluminum bar 600mm long, with diameter 40mm long has a hole drilled in the center of the bar.The hole is 30mm in diameter and is 100mm long. If modulus of elasticity for the aluminum is 85GN/m2.Calculate the total contraction on the bar due to a compressive load in 180KN
Answer:
Total contraction on the Bar = 1.22786 mm
Explanation:
Given that:
Total Length for aluminum bar = 600 mm
Diameter for aluminum bar = 40 mm
Hole diameter = 30 mm
Hole length = 100 mm
elasticity for the aluminum is 85GN/m² = 85 × 10³ N/mm²
compressive load P = 180 KN = 180 × 10³ N
Calculate the total contraction on the bar = ???
The relation used in calculating the contraction on the bar is:
[tex]\delta L = \dfrac{P *L }{A*E}[/tex]
The relation used in calculating the total contraction on the bar can be expressed as :
Total contraction in the Bar = (contraction in part of bar without hole + contraction in part of bar with hole)
i.e
Total contraction on the Bar = [tex]\dfrac{P *L_1 }{A_1*E} + \dfrac{P *L_2 }{A_2 *E}[/tex]
Let's find the area of cross section without the hole and with the hole
Area of cross section without the hole is :
Using A = πd²/4
A = π (40)²/4
A = 1256.64 mm²
Area of cross section with the hole is :
A = π (40²-30²)/4
A = 549.78 mm²
Total contraction on the Bar = [tex]\dfrac{P *L_1 }{A_1*E} + \dfrac{P *L_2 }{A_2 *E}[/tex]
Total contraction on the Bar = [tex]\dfrac{180 *10^3 \N }{85*10^3 \ N/mm^2} [\dfrac{500}{1256.64}+ \dfrac{100}{549.78}][/tex]
Total contraction on the Bar = 2.117( 0.398 + 0.182)
Total contraction on the Bar = 2.117*(0.58)
Total contraction on the Bar = 1.22786 mm
What is conduction? Please help. First answer will mark Brainliest
Answer:
Conduction is the main method of thermal energy transfer in solids.
Hope this helps.....
Answer:
conduction is the transfer of thermal energy through direct contact
Which type of motion does a spinning ball have as it rolls along a curved path?
Answer:
The ball is going to be spinning in a clockwise direction.
Transverse waves on a string have wave speed v=8.00 m/s, amplitude A=0.0700m, and direction, and at t=0 the x-0 end of the wavelength -0.320m. The waves travel in the -x string has its maximum upward displacement. a) Find the frequency, period and wave number of these waves b) Write a wave function describing the wave c) Find the transverse displacement of a particle at x=0.360m at time t=0.150 d) How much time must elapse from the instant in part (c) until the particle at x-0.360 m next has maximum upward displacement?
Answer:
a. frequency = 25 Hz, period = 0.04 s , wave number = 19.63 rad/m
b. y = (0.0700 m)sin[(19.63 rad/m)x - (157.08 rad/s)t]
c. 0.0496 m
d. 0.03 s
Explanation:
a. Frequency, f = v/λ where v = wave speed = 8.00 m/s and λ = wavelength = 0.320 m
f = v/λ = 8.00 m/s ÷ 0.320 m = 25 Hz
Period, T = 1/f = 1/25 = 0.04 s
Wave number k = 2π/λ = 2π/0.320 m = 19.63 rad-m⁻¹
b. Using y = Asin(kx - ωt) the equation of a wave
where y = displacement of the wave, A = amplitude of wave = 0.0700 m and ω = angular speed of wave = 2π/T = 2π/0.04 s = 157.08 rad/s
Substituting the variables into y, we have
y = (0.0700 m)sin[(19.63 rad/m)x - (157.08 rad/s)t]
c. When x = 0.360 m and t = 0.150 s, we substitute these into y to obtain
y = (0.0700 m)sin[(19.63 rad/m)x - (157.08 rad/s)t]
y = (0.0700 m)sin[(19.63 rad/m × 0.360 m) - (157.08 rad/s × 0.150 s)]
y = (0.0700 m)sin[(7.0668 rad) - (23.562 rad)]
y = (0.0700 m)sin[-16.4952 rad]
y = (0.0700 m) × 0.7084
y = 0.0496 m
d. For the particle at x = 0.360 m to reach its next maximum displacement, y = 0.0700 m at time t. So,
y = (0.0700 m)sin[(19.63 rad/m)x - (157.08 rad/s)t]
0.0700 m = (0.0700 m)sin[(19.63 rad/m × 0.360 m) - (157.08 rad/s)t]
0.0700 m = (0.0700 m)sin[(7.0668 rad - (157.08 rad/s)t]
Dividing through by 0.0700 m, we have
1 = sin[(7.0668 rad - (157.08 rad/s)t]
sin⁻¹(1) = 7.0668 rad - (157.08 rad/s)t
π/2 = 7.0668 rad - (157.08 rad/s)t
π/2 - 7.0668 rad = - (157.08 rad/s)t
-5.496 rad = - (157.08 rad/s)t
t = -5.496 rad/(-157.08 rad/s) = 0.03 s
The frequency of the wave is 25 Hz, the period is 0.04 s, and the wave number of the given wave is 19.63 rad/m.
(A) Frequency of the wave,
[tex]\bold {f = \dfrac v{\lambda}}[/tex]
where
v - speed = 8.00 m/s
λ - wavelength = 0.320 m
[tex]\bold {f = \dfrac {8.0 m/s }{0.32\ m} = 25\ Hz}[/tex]
Period of the wave,
[tex]\bold {T = \dfrac 1f = \dfrac 1{25 } = 0.04\ s }[/tex]
Wave number of the wave,
[tex]\bold {k = \dfrac {2\pi }{\lambda} = \dfrac {2\pi }{0.320} = 19.63\ rad\ m^{-1}}[/tex]
(B)
Wave function equation of a wave,
y = A sin (kx - ωt)
where
y - displacement of the wave
A = amplitude = 0.0700 m
ω = angular speed = 2π/T = 2π/0.04 s = 157.08 rad/s
Put the values in the formula,
y = (0.0700 m)sin[(19.63 rad/m)x - (157.08 rad/s)t]
(C) When x = 0.360 m and t = 0.150 s,
y = (0.0700 m)sin[(19.63 rad/m × 0.360 m) - (157.08 rad/s × 0.150 s)]
y = 0.0496 m
Therefore, the frequency of the wave is 25 Hz, the period is 0.04 s, and the wave number of the given wave is 19.63 rad/m.
To know more about waves,
https://brainly.com/question/3004869
Which describes how to calculate density? mass divided by volume volume divided by mass mass added to volume volume subtracted from mass
Answer:
Mass divided to volume (D = M/V)
Explanation:
Its the formula :)
Answer:
A. mass divided by volume
Explanation:
The density formula is given as:
d=m/v
where m is the mass and v is the volume.
In this formula, the mass of an object is divided by its volume. Therefore, the correct answer is A. mass divided by volume.
1) Which one of the following is vector,
B) Momentum
C) Mass
A) Energy
D) Temperature
Answer:
momentum is a vector quantity that points in the same direction as velocity
Explanation:
Kelvin is the base unit of which pysical quantity?
Those quantities which can be measured directly or indirectly is called physical quantities.
There are two types of physical quantities.They are:
fundamental quantityThose quantity which are not dependent upon any quantity are called fundamental quantity.for eg: length,mass time etc.
Derived QuantityThose quantity which are dependent upon other quantities are called derived Quantity. for eg: volume,area etc.
About temperature:Temperature is the degree of hotness and coldness of a body.Temperature is measured in degree,Celsius,degree Fahrenheit or Kelvin scale.Temperature is measured by using thermometer.
Hope this helps....
Good luck on your assignment.....
Answer:
Thermodynamic temperatureExplanation: Research states that ;
Thermodynamic temperature is the measure ( absolute) of temperature and is one of the principal parameters of thermodynamics.
It uses the kelvin scale for measurement and selects the triple point of water at 273.16 K as the fundamental fixing point.
What is the role of a carburettor.
A baseball pitcher loosens up his pitching arm. He tosses a 0.20-kg ball using only the rotation of his forearm, 0.28 m in length, to accelerate the ball. What is the moment of inertia of the ball alone as it moves in a circular arc with a radius of 0.28 m?
Answer:
Moment of Inertia, I = 0.016 kgm²
Explanation:
Mass of the ball, m = 0.20 kg
Length of the pitcher's arm, l = 0.28
Radius of the circular arc, r = 0.28 m
Moment of Inertia is given by the formula:
I = mr²
I = 0.20 * 0.28²
I = 0.20 * 0.0784
I = 0.01568
I = 0.016 kgm²
A reheat Rankine cycle operates with water as the working fluid. Steam enters the first turbine at 8 MPa and 450°C and exits at 0.8 MPa. It is then reheated to 400°C before entering the second turbine, where it exits at 10 kPa. If the amount of work into the pump is 8.04 kJ/kg and the net work per cycle produced is 1410.25 kJ/kg, determine the thermal efficiency of the cycle
Answer:
The thermal efficiency, [tex]\eta _{reheat}[/tex], of the Rankine cycle with reheat is 36.81%
Explanation:
p₁ = 8 MPa = 80 Bars
T₁ = 450°C = 723.15 K
From steam tables, we have;
v₁ = 0.0381970 m³/kg
h₁ = 3273.23 kJ/kg
s₁ = 6.5577 kJ/(kg·K) = s₂
The p₂ = 0.8 MPa
T₂ = Saturation temperature at 0.8 MPa = 170.414°C = 443.564 K
h₂ = 2768.30 kJ/kg
[tex]T_{2'}[/tex] = 400°C = 673.15 K
[tex]h_{2'}[/tex] = at 400°C and 0.8 MPa = 3480.6 kJ/kg
p₃ = 10 kPa = 0.1 Bar
T₃ = Saturation temperature at 10 kPa = 45.805 °C = 318.955 K
h₃ = 2583.89 kJ/kg
h₄ = [tex]h_{3f}[/tex] = 191.812 kJ/kg
The thermal efficiency, [tex]\eta _{reheat}[/tex], of a Rankine cycle with reheat is given as follows;
[tex]\eta _{reheat} = \dfrac{\left (h_{1}-h_{2} \right )+\left (h_{2'}-h_{3} \right )-W_{p}}{h_{1}-\left (h_{4}+W_{p} \right )+\left (h_{2'}-h_{2} \right )}[/tex]
Therefore, we have;
[tex]\eta _{reheat} = \dfrac{(3273.23 -2768.30 ) + (3480.6 -2583.89 ) - 8.04)}{(3273.23 -(191.812 + 8.04) + (3480.6 -2768.30 ) } = 0.3681[/tex]
Which in percentage is 36.81%.
HELLLP PLEASE || the graph below shows a conversion of energy for a skydive jumping out of a plane and landing safely on the ground. which energy is represented by line A? A) Potential B) Thermal C) Kinetic D) Total Energy
Answer: I maybe wrong but i'm pretty sure its C) Kinetic energy
