Answer:
Work shown below!
Explanation:
[tex]Time=\frac{Distance}{Speed} =\frac{1km}{1.2mm/s}=\frac{1}{1.2}=0.8333333[/tex]
Which of the following statements best describes an electromagnetic wave with a short wavelength?
A.)It has a low frequency and can travel in a vacuum (space)
B.)It has a high frequency and can travel in a vacuum (space
C.)It has a low frequency and can only travel in a medium
D.)It has a high frequency and can only travel in a medium
Electromagnetic wave has a high frequency and can travel in a vacuum or space.
It has a high frequency and can travel in a vacuum or space is the statement which best describes an electromagnetic wave having shorter wavelength because electromagnetic waves having shorter wavelength has high frequency and it can propagate through space means need no medium for propagation.
The transmission of electromagnetic waves does not require a medium and they are able to travel through vacuums or space. Ultraviolet light, X-rays, and gamma rays are the examples of electromagnetic waves so we can conclude that electromagnetic waves having shorter wavelength has high frequency and it can propagate through space.
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What is the Nervous System made up of?
Answer:
Hope this helps you mate.
Explanation:
Nervous system consists of brain,spinal cord and nerves.
Connie flew from Phoenix to flagstaff, a distance of 180 miles at a constant speed of 180 miles per hour. She then returned to the same airport at a stand speed of 90. Miles per hour. What was Connie average speed in miles/ hour
Answer:
120 miles/hour
Explanation:
The average speed is the ratio of total distance covered by an object or a body to the total time taken to cover the distance.
Mathematically,
Average speed = total distance covered/total time taken
In the case of Connie:
total distance = 180 + 180 = 360 miles
In order to calculate the time for each trip
speed = distance/time
time = distance/speed
From Phoenix to flagstaff:
time = 180/180 = 1 hour
From flagstaff back to Phoenix:
time = 180/90 = 2 hours
total time taken = 1 + 2 = 3 hours
Average speed = 360/3 = 120 miles/hour
Hence, the average speed is 120 miles per hour.
Set-up: Set initial speed at 15 m/s. Set the height of the cannon to 0 meters. Be sure that air resistance is NOT checked.
B. 2. Our independent variable in this simulation will be the launch angle. Keeping the speed at 15 m/s, vary the launch angle as indicated in the table below. Drag the crosshairs marked with time and range to the spot where the object landed. Then drag the crosshairs to the top of the parabola to find max height. Fill in the table below with the values.
Answer:
tatti kha le
Explanation:
Which best explains why the shape of a liquid can change? (1 point) a The particles have just enough energy to move past each other. b The particles are charged. c The particles move at very high speeds at all times. d The particles are highly compressible.
Answer:
The particles have just enough energy to move past each other.
Answer:
A
Explanation:
Solid's particles cannot move past each other and are stuck in place. Liquid's particles are able to slightly move past each other. And gas's particles move freely.
Hope this helps!
What happens whenever energy is transformed from one form to another?
Answer:
Energy transformation is when energy changes from one form to another – like in a hydroelectric dam that transforms the kinetic energy of water into electrical energy. While energy can be transferred or transformed, the total amount of energy does not change – this is called energy conservation.
Explanation:
Hope This Helps!!
God Bless!!
~DuffyDuck~
A tall tree has more chance to break during the storm, why?
because the top part become weaker
Explanation:
Unfortunately, all trees have some potential to fail during heavy winds or other harsh elements, such as snow and ice. ... In these incidences, the tree trunk acts as a lever and the force applied to the roots and trunk increases with height and mass. Taller trees are more susceptible to windthrow.
"Windthrow" is a phenomenon that uproots a tree because the trunk acts as a lever applying force to the roots. ... Trees are more likely to uproot during strong winds especially if the tree is top-heavy which can also result in tearing, splitting and limb breakage
if i want an thrilling job witch should i chose im stuck beetween,
1. horse rider
2. drawer
3. photographer
Answer:
horse rider
Explanation:
it will help in the future and its fun
which are considered noble gases
Answer:Argon
Neon
Helium
Krypton
Xenon
I need help please; I'll mark you brainliest
Answer:
Its number 1.
Explanation:
Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.
Answer:
It’s both I and II
Explanation:
Speed refers to how fast something goes by using the equation distance/time. So it only uses distance and time.
On the other hand velocity is basically speed, so it uses distance/time, but the only difference is velocity uses direction.
30 POINTS PLS ANSWERRRR
For each of Newton’s three laws of motion, compare hitting a 500-g croquet ball with a mallet to hitting a 56-g tennis ball with the same mallet and the same amount of force.
Answer:The croquet ball velocity v will be 56/500 the tennis ball velocity V after the impulse.
The second law (force = mass*acceleration) says that the same force will accelerate the balls by the inverse of their mass. That is, the force will continuously change the momentum:
f = 500a = 56A
Therefore a = f/500 and A = f/56
and a/A = 56/500.
The croquet ball will accelerate less, for whatever time or distance you apply the force.
The third law: for every action, there is an equal and opposite reaction. So, if in fact you apply the same force to strike each ball, you will feel the same reaction. That’s probably easier to do for a quick strike (the impulse case above) than for a long, smooth acceleration over distance, because the balls have very different elastic response. The body can tell how equally you applied force!
Explanation:
Why does the law of conservation of energy limits the efficiency of any machine.
Answer: Because machines cannot create new energy themselves, they merely change its direction, its form, the amount applied, or the distance it is applied over. Therefore, although it may seem like machines make things easier, in reality they just convert one form of energy into another, and cannot multiply energy or work.
Explanation:
what type of energy is mowing a lawn ? quick pleaseeeeeeeeeeeeeeeeeeeee
Answer:
Movement is mechanical energy. When someone drives a car or runs a gas powered lawn mower, the gasoline burns in the engine. The engine transforms the chemical energy of the burning gasoline into mechanical energy to move the car or mower.
From: Sciencetimego.com
Answer:
mechanical energy
Explanation:
How massive is a frisbee if it accelerates at 12 m/s/s when a force of 6 newtons is applied to it?
6. A sled traveling at a speed of 3.0 m/s slows to a stop 4.0 m from the point where
its passenger rolled off. What is the magnitude of the horizontal net force that
slows the 110 N sled? (Assume ag = 10m/s2)
D
Answer:
-12.38 N
Explanation:
This question requires you to first find the acceleration then apply Newton's 2nd law of motion to find the force.
To find deceleration use the formula;
v²= u²+2ad ---where
v= final speed = 0 m/s
u= initial speed = 3.0 m/s
a= acceleration { in this case , deceleration} = ?
d= distance from the point where its passenger rolled off= 4.0 m
therefore ;
[tex]a=\frac{v^2-u^2}{2d}[/tex]
[tex]a=\frac{0^2-3^2}{2*4} =\frac{-9}{8} m/s^2[/tex]
Mass of the sled is calculated from its weight force.
Weight force = mg
mass of sled = weight force / g where g= 10 m/s²
mass of sled = 110/10 = 11kg
The magnitude of horizontal net force will be : F= ma where ;
m= mass of sled = 11 kg
a= deceleration = -9/8 m/s²
F = 11 * -9/8 = -12.38 N
Force is acting on the opposite direction of the initial motion of the sled.
The magnitude of the horizontal net force acting on the sled is 12.375 N.
Given data:
The initial speed of sled is, u = 3.0 m/s.
The final speed of sled is, v = 0 m/s.
The distance covered before stopping is, s = 4.0 m.
The weight of sled is, W = 110 N.
Using the Newton's second law, the net horizontal force acting on the sled is given as,
F = ma
here,
m is the mass of sled.
a is the acceleration of sled.
Mass is calculated from the weight as,
W = mg
110 = m (10)
m = 11 kg.
Now, using the second kinematic equation of motion to obtain the acceleration of sled as,
[tex]v^{2}=u^{2}+2(-a)s\\\\0^{2}=3^{2}+2(-a)4\\\\8a=9\\\\a=1.125 \;\rm m/s^{2}[/tex]
Then the magnitude of net horizontal force is,
[tex]F = ma\\\\F = 11 \times 1.125\\\\F = 12.375\;\rm N[/tex]
Thus, we can conclude that the magnitude of the horizontal net force is 12.375 N.
Learn more about the Newton's second law here:
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