What is perception?.....
Answer:
how you see something
Explanation:
how to convert 40m/min to km/h? need step by step explanation
How to convert m/sec into km/hr
1 m = 1/1000 km; 1 sec = 1/3600 hr
1 m/sec = 3600/1000 km/hr = 18/5 km/hr
To convert m/sec into km/hr, multiply the number by 18 and then divide it by 5.
Need detail explanation? Go to bottom
Solved Example 1:
Convert 20 m/sec into km/hr.
Solution:
20 m/sec
Step 1:
Multiply 20 by 18
We have 20 * 18 = 360
Step 2:
Divide 360 by 5
360/5 = 72
Final Answer:
20 m/sec = 72 km/hr
Try yourself: Practice Sheet 1
Solved Example 2:
Convert 36 m/sec into km/hr.
Solution:
36 m/sec
Step 1:
Multiply 36 by 18
We have 36 * 18 = 648
Step 2:
Divide 648 by 5
648/5 = 129.6
Final Answer:
36 m/sec = 129.6 km/hr
Try yourself: Practice Sheet 2
Better Understanding:
The problem can be solved using an unitary method.
A shopkeeper sells each pencil for 5 cents. How much do 4 pencils cost? 4 * 5 cents= 20 cents, isn't it? What is the cost of 7 pencils? Yes, your guess is right. It is 7 * 5 cents = 35 cents.
Let us work out the problem in example 1 as it explained here.
20 m/sec = 360/5 = 72 km/hr
What is the universal service obligation
Answer:
Universal service is an economic, legal and business term used mostly in regulated industries, referring to the practice of providing a baseline level of ser
Explanation:
From Google
Can I have brainliest
Some radio waves have a frequency of 4.8 × 10^9 Hz. Wave speed of electromagnetic waves = 3.0 × 10^8 m/s. Calculate the wavelength of the radio waves. Give your answer to 2 significant figures. Give the unit. *
4 points
Your answer
PLEASE HELP THANK YOU
Answer : The wavelength of the radio waves is [tex]6.2\times 10^{-2}m[/tex]
Explanation : Given,
Frequency = [tex]4.8\times 10^9 Hz[/tex]
Wave speed = [tex]3.0\times 10^8 m/s[/tex]
As we know that the speed of a wave is related to its frequency and wavelength.
Formula used:
[tex]\nu =f\times \lambda[/tex]
where,
[tex]\nu[/tex] is the wave speed in metres per second, (m/s )
f is the frequency in hertz, (Hz )
[tex]\lambda[/tex] is the wavelength in metres, (m)
Now putting all the given values in the above formula, we get:
[tex]3.0\times 10^8 m/s=(4.8\times 10^9 Hz)\times \lambda[/tex]
[tex]\lambda=6.2\times 10^{-2}m[/tex]
Therefore, the wavelength of the radio waves is [tex]6.2\times 10^{-2}m[/tex]
The wavelength of the radio waves is 0.063 m
Properties of wavesFrom the question, we are to determine the wavelength of the radio waves.
From the formula,
[tex]c = f \lambda[/tex]
Then, we can write that
[tex]\lambda = \frac{c}{f} [/tex]
Where c is the wave speed
[tex]f [/tex] is the frequency
and [tex]\lambda [/tex] is the wavelength
From the given information,
[tex]f = 4.8 \times 10^{9} \ Hz [/tex]
and [tex]c = 3.0 \times 10^{8} \ m/s[/tex]
Putting the parameters into the formula, we get
[tex]\lambda = \frac{3.0 \times 10^{8} }{4.8\times 10^{9} } [/tex]
[tex]\lambda = 0.625 \times 10^{-1} [/tex]
[tex]\lambda = 0.0625 \ m [/tex]
[tex]\lambda = 0.063 \ m [/tex] (to 2 significant figures)
Hence, the wavelength of the radio waves is 0.063 m
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Approximately how much time is needed to travel a 35 kilometers at 45 km/hr?
Answer:
The answer is 0.78 hrsExplanation:
To find the time taken given the velocity and distance we use the formula
[tex]t = \frac{d}{v} \\ [/tex]
where
d is the distance
v is the velocity
We have
[tex]t = \frac{35}{45} = \frac{7}{9} \\ = 0.77777...[/tex]
We have the final answer as
0.78 hrsHope this helps you
state Newton's second law of
motion and write down
three examples to
justity it.
Answer:
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
[tex]f = m \times a[/tex]
f= force
m=mass
a=acceleration
Explanation:
examples:
riding your bicycle
•your bicycle is the mass, your leg pushing in pedals of your bicycle is the force
pushing a box
•the box is the mass, you are pushing the box
setting a pencil down in a table
•the pencil is the mass, you are puting the pencil down
A toddler drops his pacifier from the Royal Gorge Bridge in Colorado. If the pacifier took 7.71 s to fall how fast was it traveling when it hit the water?
Answer:
75.56 m/s
Explanation:
The following data were obtained from the question:
Initial velocity (u) = 0 m/s
Time (t) = 7.71 s
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) =..?
Thus, we can obtain the velocity (v) with which the pacifier hit the water as follow:
v = u + gt
v = 0 + (9.8 × 7.71)
v = 0 + 75.558
v = 75.558 ≈ 75.56 m/s
Therefore, velocity with which the pacifier hit the water is 75.56 m/s
Which describes one event that causes an eclipse?
Pick One.
Earth’s rotation on its axis
shadows from clouds covering Earth
Earth’s shadow covering the moon
the gravity from the moon and Sun pulling in the same direction
Answer:
c. earth's shadow covering the moon
Explanation:
One thing that produces an eclipse is when Earth's shadow covers the moon and the moon and Sun's gravitational pull on each other. Option C is correct.
What is a solar eclipse?When the moon passes in front of Earth and the sun, it creates a solar eclipse and casts a shadow across the globe.
A solar eclipse can occur only during the new moon phase when the moon travels squarely between the sun and Earth and casts shadows on its surface.
Earth’s shadow covers the moon the gravity from the moon and Sun describes one event that causes an eclipse.
Hence option C is correct.
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A rock is dropped from a cliff that is 45 m high. How long does it take to hit the ground?
Answer:
It will take 6 seconds.
Explanation:
The mass is 2.0 kg. If the net force is 20.0 N, what is the acceleration?
Answer:
The answer is 10 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
f is the force
m is the mass
We have
[tex]a = \frac{20}{2} \\ [/tex]
We have the final answer as
10 m/s²Hope this helps you
Answer: BUTT
Explanation: Because its a Cheek;)
Question 2 (4 points) The cause of heat cramps is the loss of sodium and potassium through heavy sweating? True False
Answer:
True
Explanation:
Lose of water content in our body through sweating and lose of essential salts such as potassium and sodium causes heat cramps...
Thank you
1. A plane travels a distance of 500
kilometers in 3600 seconds. What is the
average speed of the plane?
1.39 m/s
69.4 m/s
139 m/s
0.694 m/s
Answer:
Option C, 139 m/s
Explanation:
s = d/t
s = 500*10^3/3600
s = 138.8 = 139 m/s
How long it takes an object to move a certain distance if we know its average speed and the total distance it covers. As previously, it makes no difference whether the speed is constant or not; all that matters is the average distance travelled. Thus, option C is correct.
What average speed of the plane?The object's average speed is the total distance it travels in a predetermined amount of time. A scalar value represents the typical speed. It is characterized by the magnitude and lacks direction.
A body's average speed is its mean value over a given amount of time. Since a moving body's speed fluctuates over time and is not constant, an average speed formula is required.
Therefore, s = d/t s = 500×10^3/3600 s = 138.8 = 139 m/s. Distance travelled divided by time passed equals average speed.
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Sound waves being bent as you yell through your cupped hands (medium does not change) is an example of?
THE ANWER IS DEEZ NUT.Z
A physics student is adjusting the settings of their projectile launcher. If the Vx =
28 m/s and the Vy = 15 m/s, what is the magnitude of its velocity?
32 m/s
13 m/s
43 m/s
1009 m/s
Answer:
32m/s
Explanation:
obtained from V=vx square roo+ vy square root but all terms are squared.
What is the magnitude?
for any given motion the velocity is
Answer:
The velocity of an object refers to the rate at which the object's position changes. For any given motion, it is possible that an object could move very fast yet have an abnormally small
Formula:
velocity = distance travelled in a straight line/ time taken
Which elements listed below are most likely to form anions? Select all that apply. Lithium (Li) Calcium (Ca) Sulfur (S) Fluorine (F)
Answer: Li, S, F
Explanation:
They are all non-metallic elements
According to the electronic configuration, elements which will most likely form anions sulfur and fluorine .
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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is my answer correct plz explain i don't understand it.
Answer:
yes that is correct
Explanation:
In a fruit basket there are 9 bananas, 4 apples, and 3 plums.
The ratio of plums to apples is _______
Answer:
3:4
Explanation:
PLZ HELP :'3
How could you make a generator turn into a motor?
How could you make a motor turn into a generator?
Which one is more important, a motor or a generator? Defend your answer.
Which one would be more difficult to investigate, a motor or a generator? Defend your answer.
Answer:
1.Turn your DC motor into a generator by disconnecting your motor load and replacing it with a prime mover (probably a petrol engine), then disconnect your DC supply lines from the motor and connect them to your electrical load (lighting system, heating units, etc.), taking care to convert the shunt windings of your
2.Start the motor-generator turning by whatever means you have elected to use, such as a gasoline engine. The motor-generator must spin at 5 to 10 percent over its rated speed. Allow the motor-generator to run for 1 to 2 minutes.
Explanation:
What does the Bohr Model show us?
1.The number of neutrons
2.The number of electrons
3.The number of protons
Answer:
2
Explanation:
Answer:The number of electrons
Explanation:
A boy stands at a certain distance from a large building and blows a whistle. After 2.3s he hears the echo of the sound. He moves 50m towards the building and blows his whistle again; this time the echo reaches him after 2.0s. Calculate thei. Boys original distance from the building ii. Speed of sound in air
Answer:
I) 57.5 m
Il) 50 m/s
Explanation:
Given that a boy stands at a certain distance from a large building and blows a whistle.
After 2.3s he hears the echo of the sound. The speed V of the sound will be:
V = 2X / T
Where X is the distance covered
V = 2X / 2.3
V = 0.87X ...... (1)
He moves 50m towards the building and blows his whistle again; this time the echo reaches him after 2.0s.
V = (2×50) / 2
V = 50 m/s
Substitutes the V into equation 1
50 = 0.87X
X = 50 / 0.87
57.5 m
Therefore, the Boys original distance from the building is 57.5m and the
Speed of sound in air is 50m/s
How can Newton's third law describe the forces affecting a rocket as it
descends to Earth's surface?
Answer:
His third law states that for every action (force) in nature there is an equal and opposite reaction. In re-action, a thrusting force is produced on the engine mount. The thrust accelerates the rocket as described by Newton's second law of motion.
Explanation:
Answer:
The force the rocket exerts on the air is in the direction opposite to
the force that the air exerts on the rocket.
Explanation:
HURRY PLEASE SHOW THE WORK TOO!! A truck and a motorbike are at rest and are 900 m apart. They start moving toward, the car accelerates at a rate of 3.2 m/s2 and the motorcycle accelerates at a rate of 5.1 m/s2. At what position will each object pass each other relative to the starting point?
Answer:
They pass each other at 2415.79 m relative to the starting point.
Explanation:
Let s represent the distance moved by the car.
Since they are 900 m apart, it starts from rest and the truck moves at an acceleration of a = 3.2 m/s², we use
s - s₀ = ut + 1/2at² u = initial velocity = 0 (since it starts from rest) and s₀ = 900
s = 900 + 1/2 × 3.2 m/s² × t²
s = 900 + 1.6t²
Let s' represent the distance moved by the motorcycle.
Since it starts from rest and the motorcycle moves at an acceleration of a = 5.1 m/s², we use
s' - s₀' = ut + 1/2at² u = initial velocity = 0 (since it starts from rest) and s₀' = 0 (the starting point of the motorcycle)
s' = 0 + 1/2 × 5.1 m/s² × t²
s' = 2.55t²
At the point where they pass each other, s' = s
2.55t² = 900 + 1.6t²
collecting like terms, we find the time which they meet each other
2.55t² - 1.6t² = 900
0.95t² = 900
t² = 900/0.95
t = √(947.37)
t = 30.78 s
Substituting t into s', we have
s' = 2.55t²
= 2.55(30.78)²
= 2.55(947.37)
= 2415.79 m
So, they pass each other at 2415.79 m relative to the starting point.
An object has a variable volume and shape before it changes state. After the
change, it can still change in shape but has a fixed volume. Which change of
state has occurred?
A. Solid to liquid
B. Gas to plasma
O C. Liquid to gas
O D. Gas to liquid
SUBMIT
Answer:
it is gas to liquid
Explanation: ap3x
When the steel ball drops on the constant velocity cart, it follows a ____ path in the frame of reference fixed to the ____, but a ____ straight line in the frame of reference of the constant velocity cart. Without a fixed reference frame, one cannot tell whether or not you are in a ____ frame of reference. All frames of reference moving at constant velocity with respect to one another are__equivilent__.
Answer:
PARABOLIC, EARTH, VERTICAL, INERTIAL ang PHYSICAL LAWS
Explanation:
In this exercise you are asked to complete the missing words.
When the steel ball falls on the constant speed car, it follows a PARABOLIC path in the reference frame fixed to EARTH, but a VERTICAL straight line in the reference frame of the constant speed car. Without a fixed frame of reference, you cannot tell whether or not you are in an INERTIAL frame of reference. All frames of reference that move at constant speed relative to each other are PHYSICAL LAWS__equivilent__.
\ r
Is image 2 correct?
Yes
or
No
why knowing how to graph movement can help you on a practical level?
When doing analysis of any kind, calculations can be assessed better using a graph.
What are the features of graph ?
A graph can be presented as pictorial form the of data of numeric values in an organized manner which helps the user to represent large amount of data in visual form.
There are two types of questions and the features of graphs are interpretation of given graphs or selecting a graph based on a verbal description.
The bar graphs are the most commonly used type of graph, other graphs are dot plots, histograms, line graphs and scatterplots.
A Bar Graph can be presented as the graphical display of data using rectangular bars of different parameters like heights, The structure can be represented in the y axis contains values, and the x axis contains categories or time periods.
A dot plot is a simple graphical representation which shows the frequency with which items appears in a data set and present data on the x axis.
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Which of the following is NOT a vector quantity? displacement
speed
acceleration
force
Answer:
Displacement
Explanation:
What is the energy of electric charges?
Answer:
Electric potential energy, or Electrostatic potential energy, is a potential energy (measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.
Explanation: