Answer:
The velocity of the tuning fork sound is 317.4648 m/s
Explanation:
The given parameters are;
The frequency of the fork, f = 426.7 Hz
The length of the closed air column, L = 0.186 m
The diameter of the tube, d = 0.15 m
At the fundamental frequency in a closed tube, we have;
λ = 4·L
Where;
λ = The wavelength of the wave
L = The length of the tube
From the equation for the velocity of a wave, we have;
v = f·λ
Where;
v = The velocity of the (sound) wave
f = The frequency of the wave = 426.7 Hz
λ = 4·L = 4 × 0.186 m = 0.744 m
∴ v = 426.7 Hz × 0.744 m = 317.4648 m/s
Therefore, the velocity of the sound produced by the tuning fork, v = 317.4648 m/s
HELP!
Which of the following is true about having too little body fat?
Too little body fat can help increase your metabolism
Too little body fat is a health risk
Too little body fat can cause a heart attack
Too little body fat is good for your overall health
Which of the following is a Myth about fat loss?
Most people who are high in body fat eat too much
Any exercise that burns calories will cause the body's general fat deposit to decrease
You can lose body fat over time with regular physical activity if your calorie intake is less than calories burned in a given day
You can spot-reduce by exercising a specific body part to lose fat in that area
Which of the following statements is true about Metabolism?
Your metabolism speeds up naturally as you get older
Your basal metabolism is the amount of energy (calories) your body uses just to keep you living.
You can never speed up or slow down your body's metabolism
Your metabolism is not affected your heredity, age, and maturation
Answer:
too little body fat is a health risk
Explanation:
IF you do not have enough body fat you can have bad things happen to you
When humans pollute lakes, rivers, and streams,
Answer:
when waterways are polluted it affects all forms of life in the area - including us
expression:
for example when Lakes streams and ponds are polluted it can kill or harsh fish and other Wildlife that lives there!
hope that helps !
How many joules of heat energy are needed to raise the temperature of 10.0 g (0.0100 kg) of aluminum from 22 K to 55 K, if the specific heat of aluminum is 897 J/kg * K. Explain your answer
Answer:
296.01 J
Explanation:
From the question,
Q = cm(t₂-t₁)....................... Equation 1
Where Q = quantity of heat, c = specific heat capacity of aluminium, m = mass of aluminium, t₁ = Initial temperature, t₂ = Final temperature
Given: c = 897 J/kg.K, m = 0.01 kg, t₁ = 22 K, t₂ = 55 k
Substitute these values into equation 1
Q = 897×0.01×(55-22)
Q = 897×0.01×33
Q = 296.01 J
Hence 296.01 Joules of heat is required.
Convection currents will transfer heat throughout a gas until what condition arises?
A.
The gas condenses and forms a liquid.
B.
The gas particles stop moving entirely.
C.
The gas has the same temperature throughout.
D.
The gas has no thermal energy in it.
Answer:
C
Explanation:
pls mark brainlest ty
have a good day
The gas has the same temperature throughout. (C)
For a system mass of 600g and a hanging weight of 0.50 N, determine the acceleration of the system
Answer:
A=0.80
Explanation:
a=2×100/time^2. a=2×100/15.86^2. = a=0.80
The acceleration of the system will be 0.833 meters per second square.
What is newton's second law?The behavior of things is predicted by Newton's first rule of motion when all external forces are equal. The first law, sometimes known as the law of inertia, asserts that if an entity's energies are balanced, its acceleration will be zero meters per second.
When all forces are balanced, an object is said to be in equilibrium and won't accelerate. Newton postulated that an item will only accelerate in the presence of a net or uneven force. An object will accelerate if there is an imbalanced force present, altering its direction, speed, or both.
Let 'm' be the mass of the object in kilogram and 'a' is the acceleration of the object in meters per second square. Then the force on the system is calculated as,
F = ma
For a system mass of 600g and a hanging weight of 0.50 N. Convert the mass of the object into kilogram. Then we have
m = 600 / 1000
m = 0.6 kg
Then the acceleration of the system will be calculated as,
0.50 = 0.6 × a
a = 0.833 meters per second square
The acceleration of the system will be 0.833 meters per second square.
More about newton's second law link is given below.
https://brainly.com/question/13447525
#SPJ2
To 3 significant digits, what is the period of the pendulum using the equation for the period of a simple pendulum? Hint, the information you need is on the right side of the screen. The equation for the period of a pendulum is: T = 24 V
Answer:
1.42 seconds
Explanation:
T=2*pi*(sqrt length over gravity)
T=2*pi*(sqrt 0.5/9.8)
T=1.4189
Round to 3 significant digits
T=1.42 seconds
You have two rocks made of the same material that are at the same
temperature. The first rock has three times the mass of the second rock. How
does the thermal energy of the two rocks compare?
A. The second rock has three times the thermal energy of the first rock
B. The first rick has six times the thermal energy of the second rock
C. The second rock has one-third as much thermal energy as the first rock
D. The rocks have the same amount of thermal energy
Answer:
the rocks have the same amount of thermal energy
5. You are running at your maximum speed of 6m/s to catch a bus which is
standing at the bus stop. The bus move off with an acceleration of 1m/s when
you are 20 m from it.
A. Can you catch the bus?
B. Show graphically.
A golf club with mass 0.5 kg is swung at 23 m/s toward a stationary golf ball on a tee. The club barely slows down to 17 m/s, but the ball flies off the tee at 69 m/s. Calculate the mass of the golf ball in kg. Answer to 4 decimals. Help fast please. Will mark brainliest
Answer:
I gotchu fam. 0.0435 kg
Explanation:
m1v1+m2v2=m1v1f+m2v2f
(0.5)(23)+(m2)(0)=(0.5)(17)+(m2)(69)
11.5=8.5+69m2
3=69m2
0.0435 kg
The diagram shows a skydiver at different points of her jump. At what point would her
acceleration be greatest?
A.
B.
C.
D.
spheres are not perfect in space. But <> is in the cause of their shape.
Answer:
[tex] \boxed { \tt{gravitational \: pull(force)}}[/tex]
How does a physicist define work? a force applied for a certain length of time a force applied over a distance power applied for a certain length of time power applied to something over a distance
Answer:
Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. ... To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd.
Explanation:
Definition of work in physics
A measure of energy expended in moving an object; most commonly, force times distance is work.What happens to the force between two charges when each charge is doubled and the distance between them is 1/4 its original
magnitude?
Answer:
F' = 64 F
Explanation:
The electric force between charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Where
q₁ and q₂ are charges
r is the distance between charges
When each charge is doubled and the distance between them is 1/4 its original magnitude such that,
q₁' = 2q₁, q₂' = 2q₂ and r' = (r/4)
New force,
[tex]F'=\dfrac{kq_1'q_2'}{r'^2}[/tex]
Apply new values,
[tex]F'=\dfrac{k\times 2q_1\times 2q_2}{(\dfrac{r}{4})^2}\\\\=\dfrac{k\times 4q_1q_2}{\dfrac{r^2}{16}}\\\\=64\times \dfrac{kq_1q_2}{r^2}\\\\=64F[/tex]
So, the new force becomes 64 times the initial force.
Pls help I want to give more points to people this is for 100. yes 100 points
Who is number 15 on the Kansas City Chiefs
Answer:Patrick Mahomes
Explanation:
Answer:
Patrick Lavon Mahomes II
Explanation:
PLEASE HELP—ITS PHYSICS AND I NEED ANSWERS ASAP
A car drives 30 m north in 1.5 seconds and drives 60 east in 2 seconds. What is the average velocity
Answer:
19.2 m/s
Explanation:
From the question,
Velocity = displacement/time = d/t
V = d/t.................................. Equation 1
Average velocity = Total displacement/ total time
Total dispalcement = √(30²+60²) = √4500 = 67.08 m
Total time = 1.5+2 = 3.5 s.
Substitute these value into equation 1
V = 67.08/3.5
V = 19.2 m/s.
Hence the average velocity is 19.2 m/s
The parameter given for the car during transit is 30 m north in 1.5 seconds and drives 60 east in 2 seconds, we want to find the average velocity.
average velocity is 19.2 m/s
Solution
The expression for Average velocity is
Average velocity = Total Displacement/ Total time Taken...............Eqn 1
Total Displacement = √(30²+60²) = √4500 = 67.08 m
Total time = 1.5+2 = 3.5 s.
From the Equation 1
Average Velocity = 67.08/3.5
V = 19.2 m/s.
Therefore, the average velocity is 19.2 m/s
Learn more about average velocity :
https://brainly.com/question/24739297
How do you increase mechanical energy
Answer:
If an object moves in the opposite direction of a conservative net force, the potential energy will increase; and if the speed (not the velocity) of the object changes, the kinetic energy of the object also changes.
Explanation:
Hope i explained that clearly... :)
A circus stuntman holds himself straight out by his arms from a vertical pole. If the stuntman's center of gravity is located 0.75 m away from the pole and he weights 650 N, how much force do is arms have to apply if they exert their force upwards at 0.10 m away from the pole? [4875 N]
Answer: 4875 N
Explanation:
Given
Stuntman weight is [tex]W=650\ N[/tex]
His center of gravity is located at [tex]x=0.75\ m[/tex] away from pole
If he applies an upwards force at 0.10 m away from the pole
Suppose F is the applied force
To remain vertical, the torque of weight must be canceled by the vertical force
[tex]\Rightarrow 650\times 0.75-F\times 0.10=0\\\\\Rightarrow 650\times 0.75=F\times 0.10\\\\\Rightarrow F=\dfrac{487.5}{0.10}=4875\ N[/tex]
40 g of which substance is saturated in 100 g of water at a temperature of 50°C?
A
KCI
B
Nacl
C
KNO3
D
NH4Cl
please help , its due soon
The public is not yet able to purchase cars powered by hydrogen fuel cells because engineers have to determine how
the cars perform based on which scenario?
O on racetracks
O in real-world conditions
O in flooded environments
O on closed courses
Next
Submit
Save and Exit
return
Answer:
B on EDGE
Explanation:
please help me out on this...
Only dogs
Only reptiles
Both cats and dogs
Both amphibians and reptiles
Explain why tissues in multicellular organisms are supplied with nutrients using a circulatory system.
Answer:
The tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes due the complexity of these activities
Explanation:
Multicellular organisms are organisms that are made of more than one cell. the more cells an organism has the more complex certain activities might be for the organism hence the tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes
Answer all of these questions and you will get the brain list
Answer:
1. Mechanical energy = 298.4 Joules.
2. Mechanical energy = 2140 Joules.
3. Mechanical energy = 0.2838 Joules.
Explanation:
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
[tex] P.E = mgh[/tex]
Where,
P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Given the following data;
1. Kinetic energy = 182.2 J
Potential energy = 116.2 J
To find the mechanical energy;
Mechanical energy = kinetic energy + potential energy
Mechanical energy = 182.2 + 116.2
Mechanical energy = 298.4 Joules.
2. Mass = 40kg
Velocity = 3m/s
Height = 5m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the mechanical energy;
We would determine the kinetic and potential energy respectively.
K.E = ½mv²
K.E = ½*40*3²
K.E = 20*9
K.E = 180 Joules.
P.E = mgh
P.E = 40*9.8*5
P.E = = 1960 Joules
Mechanical energy = K.E + P.E
Mechanical energy = 180 + 1960
Mechanical energy = 2140 Joules.
3. Mass = 0.002kg
Height = 3m
Velocity = 15m/s
To find the mechanical energy;
K.E = ½mv²
K.E = ½*0.002*15²
K.E = 0.001*225
K.E = 0.225 Joules.
P.E = mgh
P.E = 0.002*9.8*3
P.E = = 0.0588 Joules
Mechanical energy = K.E + P.E
Mechanical energy = 0.225 + 0.0588
Mechanical energy = 0.2838 Joules.
Which are parts of the middle ear? Check all that apply.
a) anvil
b) ear canal
c) eardrum
d) hammer
e) stirrup
f) auricle
Answer:
middle ear has three bones! the hammer, anvil, stirrup, and ear drum
Explanation:
Caroline uses 20 N of force to move a box of books 10 m. How much work
did she do?
Work = (force) x (distance)
Work = (20 N) x (10 m)
Work = 200 Joules
4) A drag racer starts her car from rest and accelerates at 10.0 m/s² for a distance of 400 m (1/4 mile). (a) How long did it take the race car to travel this distance? (b) What is the speed of the race car at the end of the run?
Answer:
A) s=1/2at^2
t=√(2s/a)=√(2x400)/10.0)=9.0s
B) v=at
v=10.0x9=90m/s
A 1,500 kg car is at rest on a level track. The driver gives the engine gas and the car begins to accelerate forward. The car moves from 0 m/s to 27 m/s in 8 sec. What is the acceleration of the car?
Answer:
3.375 m/s²
Explanation:
Using equation of motion:
v = u + at
Here, v = 27m/s & u = 0m/s & t = 8 sec
Let the acceleration be a.
=> 27 = 0 + 8(a)
=> 27/8 = a
=> 3.375 m/s²
Read the article Watering Livestock with Renewable Energy.
Why does it make sense for ranchers to use renewable energy to pump water?
Animals do not need water during the summer.
In most of the United States, there is not enough wind to run pumping systems.
Solar energy is strongest in the winter, when water is needed for animals and crops.
Wind and solar energy help save money and reduce air pollution.
Answer:
D. Wind and solar energy help save money and reduce air pollution.
Explanation:
Answer:
d
Explanation:
edge 2021
If a force of 3000 N can move a crate at an acceleration of 9.2 m/s2, what is the mass of the object?
Answer:
326 kg
Explanation:
m=f/a
3000/9.2=326 kg
what color of colors of light does red glass absorb