3.51 × 10^-7m
Explanation:
Refractive index = wavelength of the light in air ÷ wavelength in the medium
wavelength in the medium = wavelength of the light in air ÷ refractive index
= 5.4 * 10^-7 ÷ 1.54
= 3.51 × 10^-7m
A delivery man is told to go 60 miles per hour north to make his delivery on time. These instructions describe the delivery man's
Speed
Velocity
Acceleration
Magnitude
Answer:
These instructions describe the delivery man's velocity.
Explanation:
Velocity is the magnitude and direction of a certain object. Both the speed and direction are given, so these instructions would be describing velocity.
please help me-. it’s part of my major grade.
Answer:
c
Explanation:
An object raised above the ground is an example of which type of potential
energy?
A. Gravitational
B. Elastic
C. Magnetic
D. Mechanical
Answer:
Mechanical????????????
An astronaut has a mass of 95 kg. Calculate his weight on Earth.
Explanation:
mass(m)=95kg
gravity(g)=9.8m/s²
weight(w)=?
now,
w=m×g
=95×9.8
=931N
hope it helps.
Answer:
95x 0.9 = 85.5 is your answer
Explanation:
you multiply the number you have with the weight of the earth which is 0.9 and you will get 85.5
Learning Task 2: Prepare a basin with half-filled water and stone. Drop a stone
into the basin and observe what will happen. Write your answers in your
answer sheet.
1. What happens when you drop the stone?
2. What causes the ripples to form?
3. How far does the ripple continue?
Answer:
1 . What happens when you drop the stone?
Depending on the weight from which the stone was dropped, the glass might well break
2 depending on the size and weight and shape on the stone the glass might well break
3 depending on the density on the stone the stone might when float on the water
Explanition :
GIVE ME BRAINLESS PLEASE !!
The experiments are performed to check the observation of the theory.
The basin is filled with water to check the following observation in the question.
The answers are as follow:-
When you dropped the stone in the water, the water comes out from the basin which is equal to the weight of the stone.2. The impact of stone created the ripple. The magnitude of the ripple depends on the height at which stone it was thrown.
3. The ripple goes far as the weight of the stones
These are the answer to the following.
For more information, refer to the link:-
https://brainly.com/question/2127750
4. Which statement summarizes the excerpt? *
a. There are benefits of space junk to future astronauts.
b. Space junk is becoming an increasingly dangerous problem.
c. There are effective ways to get rid of the accumulating space trash.
d. Scientists are developing ways to prevent space junk.
What is the net force on the block shown above?
Fapp =25N, FG =60N
Fapp =95N, FG =60N
Fapp =60N, FG =25N
Fapp =60N, FG =95N
Answer:
What is the net force on the block shown above?
★F(app) =25N, F(G) =60N
★F(app) =95N, F(G)=60N✓
★F(app) =60N, F(G) =25N
★F(app) =60N, F(G) =95N
Explanation:
Net Force 60N Right
→F(app) = 60+F(frict) = (60+35) = 95 N
→F(N)= F(G) = 60 N
intensity of an earthquake is gennerally hingher near the
Answer:
near the epicenter.
Explanation:
Earthquake intensity is a ranking based on the observed effects of an earthquake in each particular place. Therefore, each earthquake produces a range of intensity values, ranging from highest in the epicenter area to zero at a distance from the epicenter.
If the rock was going 90m/s when it hit the ground. How many seconds would it have been falling for?
Answer:
it will hit 80
Explanation:
because evey sec
is 10
give three examplesof objectin equilibriumfound in the classroomand draw an approximate scale diagramfor the object
Answer:
Equilibrium and Statics
Addition of Forces
Resolution of Forces
Equilibrium and Statics
Net Force Problems Revisited
Inclined Planes
Two-Body Problems
When all the forces that act upon an object are balanced, then the object is said to be in a state of equilibrium. The forces are considered to be balanced if the rightward forces are balanced by the leftward forces and the upward forces are balanced by the downward forces. This however does not necessarily mean that all the forces are equal to each other. Consider the two objects pictured in the force diagram shown below. Note that the two objects are at equilibrium because the forces that act upon them are balanced; however, the individual forces are not equal to each other. The 50 N force is not equal to the 30 N force.
If an object is at equilibrium, then the forces are balanced. Balanced is the key word that is used to describe equilibrium situations. Thus, the net force is zero and the acceleration is 0 m/s/s. Objects at equilibrium must have an acceleration of 0 m/s/s. This extends from Newton's first law of motion. But having an acceleration of 0 m/s/s does not mean the object is at rest. An object at equilibrium is either ...
at rest and staying at rest, or
in motion and continuing in motion with the same speed and direction.
This too extends from Newton's first law of motion.
Explanation:
URGENT‼
Physics Angled Projectile
Answer:
5. 0.5 m/s
6. 2.06 m/s
7. 0.22 m
Explanation:
From the question given above, the following data were obtained:
Horizontal range (Rₓ) = 0.21 m
Time of flight (T) = 0.421 s
Time (t) to reach the top = 0.2105 s
5. Determination of the horizontal velocity of the ball.
Horizontal range (Rₓ) = 0.21 m
Time of flight (T) = 0.421 s
Horizontal velocity (vₓ) =?
Rₓ = vₓ × T
0.21 = vₓ × 0.421
Divide both side by 0.421
vₓ = 0.21 / 0.421
vₓ = 0.5 m/s
Thus, the horizontal velocity is 0.5 m/s.
6. Determination of the initial vertical velocity of the ball.
Time (t) to reach the top = 0.2105 s
Final vertical velocity (vբᵧ) = 0 m/s
Acceleration due to gravity (g) = 9.8 m/s²
Initial vertical velocity (vᵢᵧ) =?
vբᵧ = vᵢᵧ – gt (ball is going against gravity
0 = vᵢᵧ – (9.8 × 0.2105)
0 = vᵢᵧ – 2.06
Collect like terms
0 + 2.06 = vᵢᵧ
vᵢᵧ = 2.06 m/s
Thus, the initial vertical velocity of the ball is 2.06 m/s.
7. Determination of the maximum height reached by the ball.
Time (t) to reach the top = 0.2105 s
Acceleration due to gravity (g) = 9.8 m/s²
Maximum height (h) =?
h = ½gt²
h = ½ × 9.8 × 0.2105²
h = 4.9 × 0.2105²
h = 0.22 m
Thus, the maximum height reached by the ball is 0.22 m
Which two statements about digital data are true?
A. A virus can change or destroy digital data that are stored on a
computer
B. It is difficult to accidentally delete the data.
C. A virus prevents digital data from being changed or stolen on a
computer.
D. The quality of copies stays the same as more copies are made.
Answer:
a & b
the others don't make sense
The two statements about digital data true are
A virus can change or destroy digital data that are stored on acomputer.
It is difficult to accidentally delete the data.What is digital information?
Digital information generally consists of data that is created or prepared for electronic systems and devices such as computers, screens, calculators, and communication devices. These information are stored by cloud.
Data is different from information because data is not yet processed but information is processed.
The two statements about digital data true are
A virus can change or destroy digital data that are stored on acomputer.
It is difficult to accidentally delete the data.Thus, the correct options are A and B.
Learn more about digital information.
https://brainly.com/question/4507942
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A large pendulum swings in the lobby of the United Nations building in New York City. The pendulum has a 91-kg gold-plated bob and a length of 22.9 m. Assume g = 9.81 m/s2.
Part A
How much time does it take for the bob to swing from its maximum displacement to its equilibrium position?
Express your answer to three significant figures and include the appropriate units.
Answer:
t = 2.40 s
Explanation:
It just told me
What words from the vocabulary that is on the bottom left corner go in number 4-8?
Answer:
4) Inner Core
5) Outer Core
6)Crust
7) Convection
8) Volcanoes
Explanation:
an object that has potential energy may have this energy because of its:
- acceleration
-location
-momentum
-speed
Answer:
Location
Explanation:
Potential energy is the energy stored in an object due to its position. The most common type of potential energy - gravitational potential energy - is the energy stored in an object due to its vertical position relative to the ground or some zero level.
What is potential energy ?
"An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position." This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as the result of its position.
What is energy ?
"Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms."
Know more about potential energy here
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If two objects each with a mass of 3.9 x103 kg, produce a gravitational force between them of 5.9x10-5 N, what is the distance between them?
Answer:
9.6m
Explanation:
Given parameters:
Gravitational force = 5.9 x 10⁻⁵N
Their masses = 3.9 x 10³kg
Unknown
Distance or separation = ?
Solution:
Both of the spherical objects have the same mass as indicated in the problem.
From the newton's law of universal gravitation:
F = [tex]\frac{G m1 m2}{r^{2} }[/tex]
F is the gravitational force
G is the universal gravitation constant = 6.67 x 10⁻¹¹
m1 is the mass of object 1
m2 is the mass of object 2
r is the distance between them
Since m1 = m2 = m
So;
5.9 x 10⁻⁵ = [tex]\frac{6.67 x 10^{-11} x 3.9 x 10^{3} x 3.9 x 10^{3} }{r^{2} }[/tex]
Therefore;
r = 9.6m
What is not a common feature of both the MMPI-2 and CPI?
Which is easier for a beginner? (This is for archery)
O long bow
O recurve bow
Answer:
The recurve bows
Explanation:Vote brainliest plz
in a reaction the mass of a reactant decreases by 58g in 233 seconds. What is the rate?
I've just been doing that now, this might be a bit late but the answere is 0.25g/s
1 A ball is rolling along the floor with a constant velocity of 8 m/s. How far will it have gone after
56 seconds?
Answer:
448 meters
Explanation:
every second it moves 8 meters, so all you have to do is multiply 56x8 or 8x56 either way it is the same thing and you will get the same answer
The ball would have covered a distance of 448 m in 56 seconds.
We know the following;
Velocity of the ball = 8 m/s
time taken = 56 seconds
Also;
velocity = distance (m)/ time(s)
We now have to substitute the values into the equation hence;
8 m/s = distance/ 56 seconds
Distance = 8 m/s × 56 seconds
Distance = 448 m
Learn more about velocity: https://brainly.com/question/862972
A 0.145 kg baseball is thrown with a velocity of 25.0 m/s. How much work was done on the baseball to bring it from rest to 25.0 m/s? [Neglect air resistance]
Answer:
45.31 J
Explanation:
We are given that
Mass of baseball , m=0.145 kg
Initial velocity, u=0
Final velocity, v=25 m/s
We have to find the work done on the baseball to bring it from rest to 25 m/s
We know that
Work done = Change in kinetic energy
Work done, W=[tex]\frac{1}{2}m(v^2-u^2)[/tex]
Using the formula
Work done, W[tex]=\frac{1}{2}(0.145)((25)^2-0)[/tex]
Work done=[tex]\frac{1}{2}(0.145)(625)[/tex]
Work done, W=45.31 J
Hence, the work done on the baseball to bring it from rest to 25 m/s
=45.31 J
Please help me on this
Answer:
2nd option is the correct answer
At what height does a 1000-kg mass have potential energy of 1J relative to the ground?
Answer:
0.0001 m
Explanation:
Given
M=1000 KG
PE=1 J
G=9.8 m/s
H=?
Formula
PE = MGH
H= PE/MG
H=1/1000x9.8
H= 1/9800
or 0.00010204
Negative charges can move from one insulator to another.
True
False
Answer:
True
Explanation:
Because in atom the negative charge become lose or gain.
What is chemical equation in the picture below.
Answer:
Element
Explanation:
The Number 1 which is Ca is a calcium element that is taking part in the chemical combination.
An element is a substance made up of one kind of atom.
Calcium is an element belong to the alkali earth metals. These group of elements are found on the second group of the periodic table.
Calcium is a metal and it is a member of the s-block on the periodic table. It is combining with 2 moles of water in this chemical reaction. Calcium is made up of two valence electrons in its outermost shell.In your own words, explain what a field is in science. Use specific examples to support your explanation.
Answer:
Field, In physics, a region in which each point is affected by a force.
Explanation:
If you are driving 72 Km/h along a straight road and you reduce your speed to 45 km/h in 4.0 s,what is your acceleration during this inattentive period?
Answer:
[tex]a=-1.875\ m/s^2[/tex]
Explanation:
Motion With Constant Acceleration
It occurs when the velocity of an object changes uniformly in time.
The equation that rules the change of velocities is:
[tex]v_f=v_o+at[/tex]
Where:
a = acceleration
vo = initial speed
vf = final speed
t = time
Solving for a:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
The initial speed is vo=72 Km/h and it's reduced to vf=45 km/h in a time of t=4 s. Both speeds will be converted to m/s:
vo=72*1000/3600 = 20 m/s
vf=45*1000/3600 = 12.5 m/s
Now calculate the acceleration:
[tex]\displaystyle a=\frac{12.5-20}{4}=\frac{-7.5}{4}[/tex]
[tex]\mathbf{a=-1.875\ m/s^2}[/tex]
Which three characteristics do mechanical waves and electrocmagnetic
waves share?
O A. The waves and their energy can travel through empty space.
B. The waves transfer energy from its source.
O C. The waves begin with a disturbance.
O D. The waves and their energy move outward from the source.
In which direction of the wave motion do longitudinal waves transfer energy?
perpendicular
parallel
close
equal
Answer: definitely parallel !
Explanation: Hope This helps!
Answer:
B:parallel
Explanation:
just finished cumulative exam and this was a question
A tennis ball is thrown upwards from the edge of a cliff with a speed of 10\,\dfrac{\text m}{\text s}10 s m 10, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. It lands on the ground below the cliff 3.03.03, point, 0 seconds later. We can ignore air resistance. What is the displacement of the tennis ball? Answer using a coordinate system where upward is positive. Round the answer to two significant digits.
Answer:
5.1m
Explanation:
Given the following parameters
Speed v = 10m/s
Time = 3.0s
Required
Displacement of the tennis ball
Using the equation of motion
v² =u²-2gh (g i s negative due to upward motion of the ball)
Substitute the given values into the expression above;
0² = 10²-2(9.8)h
0 = 100-19.6h
19.6h = 100
h = 100/19.6
h= 5.1m
Hence the displacement of the ball is 5.1m
