Answer:
57°
Explanation:
Etienne Malus discovered the idea of polarization by reflection. If light is incident on a surface at an angle of 57°, the reflected ray is found to be plane polarized.
Hence, with respect to the normal to the interface, light incident at 57° is completely polarized.
How frequently do most coastal areas experience high tides?
It doesn't matter where you are. "Tides" happen twice (hi - lo - hi - lo) in about 24 hours and 50 minutes. Anywhere.
If it doesn't do two complete cycles in 24 hours 50 minutes, then it's not tide.
Answer:
Twice a day
Explanation:
EDGE
please help really easy
Answer:
I am sure it is A because no chemical change occurs and it is a physical change. If you can Brainllest than that would be great but if you wanna you don't have to. Hope this helps!! If wrong sorry.
Explanation:
role of standard unit to bring uniformity in measurement
Answer:
i don't speak english sorry
1. What is Work force and give an example.
2. If someone lifts less weight than you, explain why they can be considered more powerful.
3. What is Newton’s third law of motion? Give an example.
4. What is Newton’s first law?
Answer:
you don't no the answer of 4 number
An object has an acceleration of 18 m/s/s. If the mass of this object were tripled (with no change in its net force), then its new acceleration would be
Answer: 6
If the mass of this object were tripled (with no change in its net force) =>Its acceleration will decrease by 3 times
=> the new acceleration would be: 18/3 = 6(m/s²)
Explanation:
A car travels at a constant speed up a ramp making an angle of 28 degrees with the horizontal component of velocity is 40 kmh^-1, find the vertical and horizontal component of velocity.
Answer:
Vx = 35.31 [km/h]
Vy = 18.77 [km/h]
Explanation:
In order to solve this problem, we must decompose the velocity component by means of the angle of 28° using the cosine function of the angle.
[tex]v_{x} = 40*cos(28)\\V_{x} = 35.31 [km/h][/tex]
In order to find the vertical component, we must use the sine function of the angle.
[tex]V_{y}=40*sin(28)\\V_{y} = 18.77 [km/h][/tex]
Can u show me were these go on the picture:
Inner core
Crust/lithosphere
Lower mantle
Outer core
Upper mantle
Crust
Asthenosphere
Answer:
Here u go
Explanation:
When serving a tennis ball, a player hits the ball when its velocity is zero (at the highest point of a vertical toss). The racquet exerts a force of 443 N on the ball for 4.30 ms, giving it a final velocity of 45.7 m/s. Using these data, find the mass of the ball.
Answer:
0.041kgExplanation:
Step one:
given data
initial velocity u= 0m/s
Force F= 443N
time t= 4.3 ms= 0.0043seconds
final velocity v= 45.7m/s
Step two:
Required
mass m
we know that the expression for impulse is given as
Ft=mv
make m subject of the formula
m=Ft/v
substitute we have
m=443*0.0043/45.7
m=1.90/45.7
m=0.04kg
The mass of the ball is 0.041kg
? Question
Drag each label to the correct location on the table.
Classify the systems of equations based on the number of solutions they have.
No Solution
One Solution
Multiple Solutions
x + 2y = 1
x+10y = 50
2y - X= 12
2x - y = 17
x - 4y = 7
4x+10y = 40
2x + 5y = 40
3x+6y=3
2x+10y = 90
2y - 2 10
|2y - 3x = 5
No Solution:
4x+10y = 40
2x + 5y = 40
2x - 8y=17
x - 4y = 7
One Solution:
2y - X= 12
2y - 2x =10
x + 10y =50
2x + 10y =90
Infinitely Many Solutions:
x + 2y = 1
3x + 6y= 3
2y - 3x = 5
2/5y -3/5x =1
Explanation: You only had 11 equations listed. But I believe these are the ones you want. I took the test and got them right. Hope it helps
An elephant and a mouse when dropped from the same height (ignoring
air resistance) will hit the ground at the same time because all objects fall
at the same rate of acceleration, regardless of their mass.
True
False
Answer:
True
Explanation:
An astronaut uses a Body Mass Measurement Device to measure her mass. Part A If the force constant of the spring is 3200 N/m, her mass is 65 kg, and the amplitude of her oscillation is 1.7 cm, what is her maximum speed during the measurement
Answer:
v = 0.119 m/s
Explanation:
Given that,
Force constant, k = 3200 N/m
Mass, m = 65 kg
Amplitude of her oscillation is 1.7 cm i.e. 0.017 m
We need to find her maximum speed during the measurement. Let it is v. It is given by the formula as follows :
[tex]v=\sqrt{\dfrac{k}{m}}A[/tex]
Where,
A is the amplitude
[tex]v=\sqrt{\dfrac{3200}{65}}\times 0.017 \\\\v=0.119\ m/s[/tex]
So, the maximum speed is 0.119 m/s.
The maximum speed of the astronaut during the measurement is 0.12 m/s.
The given parameters;
force constant, k = 3200 N/mmass of the astronaut, m = 65 kgamplitude of the oscillation, A = 1.7 cm = 0.017 mThe maximum speed of the astronaut during the measurement is calculated as follows;
[tex]v = \omega A\\\\v = \sqrt{\frac{k}{m} } \times A\\\\v = \sqrt{\frac{3200}{65} } \times 0.017\\\\v = 0.12 \ m/s[/tex]
Thus, the maximum speed of the astronaut during the measurement is 0.12 m/s.
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Pleaseee helppp!!! Due in 10 minutes and I’m clueless
what lifelong benifits can be at gained by participating in tract and field?
Answer:
stamina
Explanation:
because your lungs are expanding when you run, it'll help you learn how to control your breathing, it'll help you in other situations if you have to run.
Which quantities define momentum?
A) how much weight an object has, plus magnitude of its acceleration.
B)how much force is pushing an object, plus it’s speed.
C)how fast can an object travel, plus its weight.
D)how much matter does an object has, plus the magnitude and direction of it’s motion
Answer:D
Explanation: a p e x
3. A 142 g baseball is thrown at a speed of 42.9 m/s. What is the kinetic energy of the baseball at this moment?
261 )
131 )
O 6090 )
505 )
Kinetic energy (KE) is defined by the equation KE = { mu?.
Point
0
11
4. Harriet is practicing archery. As she draws back an arrow, the arrow has 34.3 of elastic notretia
have when it is about to hit the ground?
Answer: For question 1
131 is the correct answer
KE = 1/2 mv^2
Explanation:
passenger move backward when bus at rest starts to move suddenly give reason
3. A player catches a ball. The action force is the impact of the ball against the player's glove. The
reaction force is...
a. The force the glove exerts on the ball
b. The player's grip on the glove
c. The friction of the ground on the player's shoes
Why???
Answer:
Answer: A
Explanation:
Why?? Two objects meaning they have the same force pair must remain the same
Using Newton's third law, we find that the correct answer to the reaction force is a: the force of the glove on the ball
Given parameters
The force of the ball on the gloveto find
The reaction force
Newton's third law say that forces are produced in pairs, that is, when two bodies interact, one body feels the action of the other and responds with an interaction of equal magnitude but in the opposite direction. In general, these two forces are called action and reaction, they have the following characteristics:
They are equal in magnitude has the opposite direccion each one is applied to one of the interacting bodies
let's analyze the given options using Newton's third law:
a. True. The force of the ball is on the glove, it must respond with a force of equal magnitude on the ball, therefore these are two forces of action and reaction
b. False. The grip or the player's hand does not receive the action of the ball, it receives the action of the glove
c) False. the player's shoes do not interact with the ball, interact with the ground
In conclusions by using Newton's third law the correct answer is a: the force of the glove on the ball
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A soccer ball is kicked from the ground with a velocity of 30m/s directed at an angle of 45 degrees with respect to horizontal. Resolve this velocity vector into horizontal and Vertical components
Answer:
Vertical = 21.2 m/s
Horizontal = 21.2 m/s
Explanation:
For the vertical component:
sin (45) = v/30
sin (45) x 30 = v
21.2 m/s = v
For the horizontal component:
cos (45) = h/30
cos (45) x 30 = h
21.2 m/s = h
thank you everyone and the barinly app
Answer:
youre very welcome can i get brainlist
Explanation:
If a car is traveling forward at a constant speed of 60 miles per hour, but then turns right without changing its speed, Is It accelerating? Explain why or why not?
Answer: no, because the speed remains constant.
Explanation:
you a viewing a read out on an oscilloscope that shows you when different voltages in a circuit maximize. If the period of the circuit is 0.04 seconds, how much time is there between when the capacitor voltage maximizes and the inductor voltage maximizes ?
Answer: there is 0.02 sec between when the capacitor voltage maximizes and the inductor voltage maximizes
Explanation:
Given that time period T = 0.04 sec
Now as the voltage across inductor maximizes, voltage across the capacitor minimizes and vice - versa;
Now, between capacitor maximizing and Inductor maximizing, there is a time of T/2
i.e t = T/2
so from our question; Time period is 0.04sec
now
t = 0.04 / 2
t = 0.02 sec
Therefore there is 0.02 sec between when the capacitor voltage maximizes and the inductor voltage maximizes
Can solar be reused? Why or why not? Use in your own words.
Answer:
Yes becacuse it will never run out. The sun is there and it soakes the light up to create energy Solar is a renewable resourse.
A 60.0-cm, uniform, 5.00-kg shelf is supported horizontally by two vertical wires attached to a sloping ceiling. The front wire is inset by a distance of 20 cm. A very small 2.50-kg tool is placed on the shelf midway between the points where the wires are attached to it.
Required:
Find the tension in the back wire.
Image is missing, so i have attached it
Answer:
Tension in back wire = 24.5 N
Explanation:
let the tension in the back wire be Tₒ
let the tension in the front wire be T
Applying static equilibrium in the vertical direction, we have:
T + Tₒ = (5 × 9.8) + (2.5 × 9.8)
T + Tₒ = 73.5
Where Tₒ = (2.5 × 9.8) = 24.5 N
Thus, Tension in back wire = 24.5 N
The tension in the back wire equals 24.5 N.
We can arrive at this answer with the static equilibrium formula, for that, let's consider that the tension in the back wire is represented by the letter "t," while the tension in the front wire is represented by the letter "T."
Therefore, we can use the following formula:
[tex]t= W*g\\t= 2,5*9.8\\t= 24.5 N[/tex]
In this case, the letter "W" refers to the tool weight, while the letter "g" refers to gravity.
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One car is traveling north at 80 km/h. A second car is traveling south at 80 km/h. Both cars have the same velocity
True
False
Answer: True
Explanation:
Venn diagrams are used for comparing and contrasting topics. The overlapping sections show characteristics that the topics have in common, and the sections that are unique to each topic show the characteristics that apply to only that topic. This Venn diagram is comparing mechanical and electromagnetic waves. 2 circles with an overlap. The left circled is labeled Mechanical Wave with further labels Carry Energy Through Matter and Examples: Ocean Waves and Sound Waves. The right circle is labeled Electromagnetic Wave with further labels Carry Energy Through Space and Examples: Light and X-ray. What could be put into the center section of this Venn diagram? “Carry energy through space” and “Follow a pattern” “Carry energy” and “Follow a pattern” “Carry energy through space” and “Can be heard” “Carry energy” and “Can be heard”
Answer:
Carry energy and follow a pattern
Both mechanical and electromagnetic waves will carry energy and follow a pattern.
What is meant by a wave ?A wave is defined as a disturbance that is formed in a medium and that carries energy.
Here,
A Venn diagram is given and the Venn diagram represents the comparison between mechanical waves and electromagnetic waves.
The main characteristics of mechanical and longitudinal waves are:
Mechanical waves require a medium in order to propagate such as water or air.
Electromagnetic waves differ from the mechanical waves such that the electromagnetic waves do not require a medium for propagation.
Therefore we can say that the electromagnetic waves will propagate through space whereas the mechanical waves will not travel through space, they need a medium.
Also, we know that waves carry energy. So, both the mechanical waves and electromagnetic waves will carry energy with them.
So, the center section of the Venn diagram will be carry energy and follow a pattern.
Hence,
Both mechanical and electromagnetic waves will carry energy and follow a pattern.
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What parts are found in an electric generator? Check all that apply. an armature a battery a permanent magnet an electromagnet brushes slip rings
The major parts that are found in the Electric generators are Armature, Battery, Permanent magnet, Brushes and Slip rings.
The given problem is based on the concept and fundamentals of Electric generator. An electric generator is a machine which converts the mechanical energy into the electrical energy. Such that these energy is utilized for transmission and distribution over the power lines to domestic and commercial uses.
The major components of an electric generator are as follows:
A statorArmatureCommutatorBrushesSlip ringsBatteryPermanent magnetThus, we can conclude that the major parts that are found in the electric generators are Armature, Battery, Permanent Magnet, Brushes and Slip rings.
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Which beaker has the most thermal energy?
Answer:
Large beaker has more thermal energy
Which are true of gamma radiation?
Check all that apply.
A. It has no charge.
B. It has a mass of 0.0005 amus.
C. It causes transmutation.
D. It usually occurs with other types of radioactive decay.
Answer:
B and D
Explanation:
Object 1 is undergoing uniform circular motion at a radius of 10 cm. Object 2 is undergoing uniform circular motion at a radius of 0.2 m. If the objects have the same mass and are traveling with the same speed, which object is experiencing the larger centripetal force and why
Answer:
The first object is experiencing a larger centripetal force because its radius is smaller compared to the second object.
Explanation:
Given;
radius of the first object, r₁ = 10 cm = 0.1 m
radius of the second object, r₂ = 0.2 m
let the mass of the two objects, = m
let the speed of the two objects = v
The centripetal force of the first object is given by;
[tex]F_c_1 = \frac{mv^2}{r_1} \\\\F_c_1 = \frac{mv^2}{0.1}\\\\F_c_1 = 10mv^2[/tex]
The centripetal force of the second object is given by;
[tex]F_c_2 = \frac{mv^2}{r_2} \\\\F_c_2 = \frac{mv^2}{0.2}\\\\F_c_1 = 5mv^2[/tex]
Therefore, the first object is experiencing a larger centripetal force because its radius is smaller compared to the second object.
The main equation we are using to measure the e/m ratio is:
e/m= 2V/r^2B^2
If the anode voltage V is increased by 4 times and the magnetic field was kept constant, the electron beam's deflection radius will be:_______
a. halved
b. no change
c. doubled
d. quadrupled
Answer:
a.
Explanation:
the electrons beams deflection radius will be halved.