Answer:
Wavelength = 0.68 meters.
Explanation:
Wavelength gives the distance between a point of rarefaction and the next compression point, in the resulting sound.
Given the following data;
Frequency = 500 Hz
Speed of sound = 340 m/s
To find the wavelength;
Wavelength = speed/frequency
Wavelength = 340/500
Wavelength = 0.68 meters
Which statement about acceleration is FALSE?
Group of answer choices
A. A car which is slowing down is accelerating
B. When acceleration and velocity are in opposite directions, acceleration is positive
C. If an object changes its direction of motion, its acceleration changes
D. A car which is speeding up is accelerating
8. Two perpendicular forces, one of 45.0 N directed upward and the other of 60.0 N directed to the
right, act simultaneously on an object with a mass of 35.0 kg. What is the magnitude of the
resultant acceleration of the object?
a) 2.14 m/s
b) 5.25 m/s
c) 3.00 m/s
d) 1.41 m/s
Answer:
[tex]a=2.14\ m/s^2[/tex]
Explanation:
Force in upward direction = 45 N
Force in right side = 60 N
Mass of the object, m = 35 kg
Net force on the object is given by :
[tex]F=\sqrt{45^2+60^2} \\F=75\ N[/tex]
We know that,
F = ma
Where
a is acceleration of the object
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{75\ N}{35\ kg}\\\\a=2.14\ m/s^2[/tex]
So, the acceleration of the object is [tex]2.14\ m/s^2[/tex].
HELP URGENT WILL GIVE BRAINLIEST
magnetism is an example of:
A. contact force
B. non-contact force
C.friction
Answer:
The answer is Non contract force
When you mix red and blue pigment, you produce the color:
orange
black
red
violet
Answer:
violet
Explanation:
Newton discovered that sunlight was composed of colors.
True or False
Answer:
True
Newton's Rainbow. In the 1660s, English physicist and mathematician Isaac Newton began a series of experiments with sunlight and prisms. He demonstrated that clear white light was composed of seven visible colors.
Explanation:
Hope it helps
As a ball is released inside Earth's gravitational field and begins to fall to the ground
HELP ASAP PLS
A) there is no gravitational potential energy between them
B) the amount of gravitational potential energy stays the same.
C) the amount of gravitational potential energy increases.
D) the amount of gravitational potential energy decreases.
Answer:
D
Explanation:
forecasted for the miscommunication between range and the other day
11. Find the direction of the Force
Answer:
We answer that before but I forgot
Two cars approach each other from opposite directions each
with a velocity of 54 km/h. One of the cars emits a note of frequency 480 Hz. What will be the approximate frequency
heard in the other car before they cross each other?
Answer:524 Hz
Explanation:
Approximate frequency, heard in other car, when two car approaches each other, before they cross each other is 524 Hz.
What is frequency?Frequency of wave is the number of waves, which is passed thorough a particular point at a unit time.
For the two cars approaching each other the Doppler formula to find the frequency of second car is given as,
[tex]f_2=\dfrac{V_s+V_2}{V_s-V_1}f_1[/tex]
Here, [tex]V_s[/tex] is the speed of the sound.
Two cars approach each other from opposite directions.The velocity of car one is 54 km/h and the velocity of the car two is also 54 km/h.
Convert the unit of velocity of the car as,
[tex]\rm 54km/s=54\times\dfrac{5}{18}m/s\\\rm 54km/s=15m/s[/tex]
As we know that the speed of the sound is 340 m/s and one of the cars emits a note of frequency 480 Hz.
Thus, putting the values in the above formula to find out the frequency heard in the other car before they cross each other as,
[tex]f_2=\dfrac{340+15}{340-15}480\\f_2=524.3\rm Hz[/tex]
The approximate frequency heard in the other car before they cross each other is 524 Hz.
Learn more about the frequency here;
https://brainly.com/question/1436295
Is the intensity of light directly or inversely proportional to the concentration according to Beer-lambert's law?
Answer:
directly proportional
Explanation:
The Beer-Lambert law states that the quantity of light absorbed by a substance dissolved in a fully transmitting solvent is directly proportional to the concentration of the substance and the path length of the light through the solution.
pick the correct answer
All of the following are shaped by learned behavior except __________. A. shyness B. blinking C. biting one’s nails D. angry responses
Answer:
B) Blinking .
Explanation:
given a force of 75N and an acceleration of 3m/s2, what is the mass
force = 75N --- (given)
acceleration = 3m/s² ---- (given)
FORCE = mass × acceleration75N = mass × 3m/s²
mass = 75÷3
mass = 25kg-----------------------------FOLLOW MEis the force on a dropped ball.
Ogravity
O acceleration
Answer:
The force applied to any falling object would be gravity. An object cannot fall if there is not gravity; it would simply float.
An open pipe is 1.42 m long.
What is the third harmonic
frequency that it produces?
(Speed of sound = 343 m/s)
(Unit = Hz)
please help me guys
Answer:
f(3) = 362.32 Hz
Explanation:
the formula of frequency of open pipe is
f(n) = (n+1)v/2L
n = 0,1,2,3,... (the order)
0 for the first
1 for the second
v = speed of sound
L = the lenght of pipe
f(3) = (2+1) * 343 / 2 * 1,42
f(3) = 3 * 343 / 2.84
f(3) = 362.324 Hz (or you can write 362.32 Hz
Answer: 362.32
Explanation:
A ball is thrown vertically upwards with a velocity
of 30 m/s. Find the greatest height attained
A. 40 m B.50 m C.55 m D.45 m
Answer:
Explanation:
The acceleration of gravity is 9.8m/s^2.
So to calculate the time it will take to make the ball stop(which btw means the ball now reach its greatest height), use the formula V1=V0+at. V1 is the final velocity(which is 0), V0 is the starting velocity(which is 30m/s), and the a(cceleration) is 9.8m/s^2.
(You can ignore the fact "at" is -30 instead 30, it's because the directions two velocity travel are opposite. )
We can now know the time it takes to make the ball stop just by the gravitational force is about 3 sec.
Use another formula S=1/2at^2, to find out the S(height) is 1/2*9.8*3^2=44.1, which is approximately D.45m .
Method
1. Place a trolley on a smooth runway and tilt the runway very slightly so that the
slope compensate for the friction between the wheels and the runway. If
pushed gently, the trolley should move at a constant velocity.
2. Measure the mass of the trolleys.
3. Attach the ticker timer to the trolley and thread the tape through the ticker
timer.
4. Attach a smooth pulley vertically to the bottom of the runway.
Answer:
3
Explanation:
it's too because on you measuring mass of something
Can you please answer these ASAP!
I will give brainliest to the person who answers it first and it must be an actual answer,
PLZ!!
Answer:
Let's explain this briefly.
Suppose that we have a piece of ice (this is, solid water) now we give energy to the piece of ice, so the temperature of the ice increases. There is a point where the piece of ice will start a change of phase, at this point the temperature of the ice stops increasing because all the energy we give to the ice is used in the change of phase.
Once we have a complete change of phase, the temperature can increase again, and now we will have liquid water.
If we keep increasing the temperature we will see this happen again, when we have the transition from liquid to gas.
(and a similar thing happen when we have a material in a given phase and we remove heat from the material).
In the images we can see the different changes of phase of water.
1) In the first image we can see the circle in a part where the temperature is constant, so the temperature does not change in this part, which means that there is a change of phase happening.
2) Here we have the circle in a diagonal line, so here the temperature is changing, meaning that we have an increase of temperature in this region.
3) Here we want to know what the x-axis represents, this should rerpesent the energy that is being given to the material (so in some parts we see that the temperature increases and in other parts we see that the material changes of phase)
Then here the correct option is heat over time.
4) The freezing point is the temperature in which the change of phase from liquid to solid happens (or solid to liquid).
In the graph we can see that this change of phase happens at the temperature T = -210°C
Then the correct option is -210°C (The last option)
if you dropped your cell phone from a height of 1.20 m above the ground, with what speed would it strike the ground
ωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωZ?
Answer: 11.8 m/s
Explanation: Multiply the height, 1.20 m by 9.8. This is because on earth free falling objects have a speed of 9.8 m/s^2 downward.
A ball rolls down an inclined plane with a constant acceleration of 2.5 m/s/s. How fast is the ball traveling after 3 seconds
Which phase of matter makes up stars?
Answer:
Plasma is a phase of matter that makes up stars.
In order to know how a force will affect an object, you must know the _______________.
inertia
weight
direction
gravity
Answer:
needs to know direction
You are designing a ski jump ramp for the next Winter Olympics. You need to calculate the vertical height h from the starting gate to the bottom of the ramp. The skiers push off hard with their ski poles at the start, just above the starting gate, so they typically have a speed of 2.0 m/s as they reach the gate. For safety, the skiers should have a speed of no more than 30.0 m/s when they reach the bottom of the ramp. You determine that for a 77.0 kg skier with good form, friction and air resistance will do total work of magnitude 4000 J on him during his run down the slope.
Required:
What is the maximum height h for which the maximum safe speed will not be exceeded?
Answer:
h = 40.37 m
Explanation:
We will apply the law of conservation of energy to the skier in this case, as follows:
[tex]Energy\ of\ skier\ at\ the\ gate = Energy\ of\ Skier\ at\ the\ end\\P.E + K.E_{i} = K.E_{f} - W_{friction}\\mgh + \frac{1}{2}mv_{i}^2 = \frac{1}{2}mv_{f}^2 - W_{friction}\\\\mgh = \frac{1}{2}m(v_{f}^2-v_{i}^2) - W_{friction}[/tex]
where,
m = mass of skier = 77 kg
g = acceleration due to gravity = 9.81 m/s²
vf = final speed = 30 m/s
vi = initial speed = 2 m/s
W_friction = Work done by friction and air resistance = 4000 J
Therefore,
[tex](77\ kg)(9.81\ m/s^2)h = \frac{1}{2}(77\ kg)[(30\ m/s)^2-(2\ m/s)^2] - 4000\ J\\\\h = \frac{34496\ J - 4000\ J}{755.37\ N}\\\\[/tex]
h = 40.37 m
. The Soviet Yuri Gagarin was the first human to orbit Earth true or false
Answer:
true , I searched and got u the answer
15. If a dog pulls a 5 kg sled with a force of 70 N, what is its acceleration?
Answer:
14 m/s^2
Explanation:
We have to use the equation F=ma because the question is a Newton's second law question.
First, list known values
F (force) = 70 N
m (mass) = 5 kg
a (acceleration) = ? (we have to solve for this)
Second, plug in known values into equation.
F=ma
70=5a
Third, solve. To solve this all you have to do is divide both sides by 5
70/5=5/5a
Fourth, your answer will be 14 meters per second squared (m/s^2)
I hope this answer helps and have a great day!
If the radius of the Earth decreases to one fourth (1/4) its original size, what would your NEW weight become
1. 4 times as much
2.1/4 as much
3.16 times as much
4.1/16 as much
Answer:
1/4 as much
Explanation:
I don't know the explanation
Andres buys a new scooter. He goes 8 Km north from the beach. He then
travels 5 Km to the east. Then chases a friend 8 Km north. What distance
did he cover?
What was Andres's displacement?
Answer:
Distance: 21km
Displacement: ~16.76km
who is Dr. Wu Lien-teh
Answer:
my mom
Explanation:
she gave birth to me!
Answer: Wu Lien-teh, was a Malayan physician renowned for his work in public health, particularly the Manchurian plague of 1910–11.
Explanation:
X_X
pick the correct answer there are three correct answers
identify and explain the climate cycle shown
below. Illustrate how conditions change during
the summer
Answer:
wnd change
Explanation: wnd chsnge