Answer:
90°
Explanation:
The intensity of the transmitted light is proportional to the square of the cosine of the angle between polarizer axes. That cosine is zero when the angle is 90°.
If you can run a distance of 400 mi in 8 h, what is your average speed?
If it took you 12 seconds to walk 36 meters, what is your velocity?
a
3 m/s
12 m/s
с
432 m/s
d
36 m/s
HEN
Answer:
3 m/s
Explanation:
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Your speed is (36m)/(12sec).
That's 3 m/s. (Choice-A)
There's not enough information to determine your velocity.
A golfer hits a ball and gives it an initial velocity of 40 m/s, at an angle of 30 degrees above the horizontal.
A) how long does the ball stay in the air? (Answer is 4.08 sec)
B) how far horizontally (the range) does the ball travel before hitting the ground? (Answer 141 m)
I need help with getting the work. If y’all could explain, that would be so helpful and thank you.
(a) The ball will stay in the air for 4.08 s.
(b) The ball travels 141 m horizontally before hitting the ground.
This is a projectile motion problem, to solve the problems above, we need to use the formula of (a) Time of flight and (b) Range.
(a)
⇒ Formula
T = 2Usin∅/g.................... Equation 1⇒Where:
T = Time of flightU = initial velocity∅ = Angle above the horizontalg = acceleration due to gravityFrom the question,
⇒Given:
U = 40 m/s∅ = 30°⇒Assuming:
g = 9.8 m/s²⇒Substitute these values into equation 1
t = 40sin30/9.8t = 2(40)(0.5)/9.8t = 40/9.8t = 4.08 sAlso,
(b) For Range
⇒ Formula
R = U²sin2∅/g............... Equation 2⇒Substitute these values above into equation 2
R = 40²sin(2×30)/9.8R = 1600×0.866/9.8R = 141.38 mR ≈ 141 mHence, (a) The ball will stay in the air for 4.08 s (b) The ball travels 141 m horizontally before hitting the ground
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A. The ball stay in the air for 4.08 seconds.
B. The ball travel nearly 141 meter before hitting the ground.
Given that, Initial velocity (v) of ball is 40 m/s, at an angle of 30 degrees above the horizontal.
[tex]v=40m/s, \theta=30,g=9.8m/s^{2}[/tex]
Here we use formula,
[tex]t=\frac{2v*sin\theta}{g}\\\\range(R)=\frac{v^{2}*sin2\theta }{g}[/tex]
Substituting values in above equations.
[tex]t=\frac{2*40*sin30}{9.8}=\frac{2*40*0.5}{9.8}=4.08s\\\\R=\frac{(40)^{2}*sin60 }{9.8} =\frac{1600*0.866}{9.8} =141m[/tex]
Hence, The ball stay in the air for 4.08 seconds and The ball travel nearly 141 meter before hitting the ground.
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determine the force of gravitational attraction between a 78 kg boy sitting 2 meters away from a 65 kg girl. circle your answer and include units
Answer:
The force of gravitational attraction is 8.454 x 10⁻⁸ N.
Explanation:
Given;
mass of the boy, m₁ = 78 kg
mass of the girl, m₂ = 65 kg
distance between the boy and the girl, r = 2 meters
The force of gravitational attraction is given as;
[tex]F = \frac{Gm_1m_2}{r^2}[/tex]
where;
G is gravitational constant = 6.67 x 10⁻¹¹ Nm²/kg²
r is the distance between two masses, m₁ and m₂
[tex]F = \frac{Gm_1m_2}{r^2} \\\\F = \frac{(6.67 \times 10^{-11})(78 \times 65)}{2^2}\\\\F = 8.454 \times 10^{-8} \ N[/tex]
Therefore, the force of gravitational attraction is 8.454 x 10⁻⁸ N.
Show FORMULA AND SOLUTION:
What acceleration will result when a 12N net force applied to a 3kg object? A 6kg object?
Answer: Given Force = 12 N
Mass = 3kg and 6kg
F= mass. acceleration
A= F/M
A(3kg object) = 12/3 = 4m/s^2
A(6kg object) = 12/6 = 2m/s^2
What would be the acceleration of an object with a mass of 5,000 g when hit with a force of 55 N?
Answer:
11 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]
f is the force
m is the mass in kg
From the question
5000 g = 5 kg
We have
[tex]a = \frac{55}{5} \\ [/tex]
We have the final answer as
11 m/s²Hope this helps you
100 pointed and brainiest.
Which structural damage could be expected if a Category 3 hurricane is predicted to hit an area?(1 point)
Well-built framed homes could sustain severe damage, with loss of most of the roof structure and some exterior walls.
Well-constructed frame homes could have damage to the roof, shingles, vinyl siding, and gutters.
A high percentage of framed homes could be destroyed, with total roof failure and wall collapse.
Well-built framed homes could incur major damage or removal of roof decking and gable ends.
Answer:
damage to a house and trees posibly
Answer:
Which structural damage might be expected if a Category 1 hurricane is predicted to hit an area?
Responses
A high percentage of framed homes could be destroyed, with total roof failure and wall collapse.
A high percentage of framed homes could be destroyed, with total roof failure and wall collapse.
ANSWER : ( Well-constructed frame homes could have damage to the roof, shingles, and vinyl siding.
Explanation: i did the quiz it was easy
changr 20 min in to hr
Answer:
change 20 min into hr = 0.33 hr
Explanation:
convert= divide the time by 60 because 60 mins make 1 hr
an astronomer from a distant star is observing the sun exactly in the plane of jupiter (so that jupiter crosses the solar disk); plot schematically the brightness of the sun he would observe it during the 50 (earth) years period.
As, orbital period of jupiter is equivalent to 12 years.
So, monitoring sun for 50 years will give periodic peaks in intensity.
What is intensity?The power transferred per unit area is referred to in physics as the intensity or flux of radiant energy, and the area is measured on a plane perpendicular to the direction of the energy's transmission. Watts per square meter are the base units of the SI system. The term "intensity" is most often used to describe the average power transfer during a wave's duration, such as sound waves or electromagnetic waves like light or radio waves. There are many different energy exchange scenarios that can be described using the word intensity. One could figure out how much kinetic energy each drop of water from a sprinkler is carrying, for instance.
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According to Newton's First Law, if there are no unbalanced forces acting on an object,
Question 6 options:
it will eventually come to a stop.
it will change direction.
it will maintain a constant speed and direction.
it will speed up.
A glider is initially moving at a constant height of 3.72 m. It is suddenly subject to a wind such that its velocity at a later time t can be described by the equation v(t) = 16.02i − 7.96(1 + t)j + 0.76t3k, where v and its components are in meters per second, t is in seconds, and the z axis is perpendicular to the level ground. (a) What was the initial velocity of the glider? (Express your answer in vector form.)
Answer:
[tex]17.89\ \text{m/s}[/tex]
Explanation:
Velocity is given by
[tex]v(t) = 16.02\hat{i}-7.96(1 + t)\hat{j} + 0.76t^3\hat{k}[/tex]
Initial velocity is asked so t = 0
[tex]v(0)=16.02\hat{i}-7.96(1+t)\hat{j}+0.76\times 0\hat{k}\\\Rightarrow v(0)=16.02\hat{i}-7.96\hat{j}[/tex]
Magnitude is given by
[tex]|v|=\sqrt{16.02^2+(-7.96)^2}\\\Rightarrow |v|=17.89\ \text{m/s}[/tex]
The initial velocity of the glider was [tex]17.89\ \text{m/s}[/tex].
How to brought people or myself out of sadness?
Answer:
appreciate things u have
find happiness in things
Explanation:
I hope this helps u!
which state of matter best describes the elements inside stars?(1 point) liquid liquid solid solid plasma plasma gas gas
Plasma best describes the elements inside stars.
Plasma:
Plasma is a charged gas and have strong electrostatic interactions.
Plasma is a state of matter that is a subset of gases, but the two states behave very differently.
plasmas are made up of atoms.
plasmas have no fixed shape or volume, and are less dense.
The electrostatic forces between the particles in the plasma become significant.
Plasma can conduct electricity because it contains charged particles.
The gas inside the bulb becomes a conductive plasma.
There are 3 states of plasma which depend on the supplied energy, usually electrical. The lowest energy state is dark mode, basically because it is invisible. The solar wind is dark mode, charged particles flowing from the Sun.
Plasma is a ionised gas , thus conduct electricity.
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Calculate the frequency of an indigo light wave with the wavelength of 4.45 x 10^-7 m. The speed of light is 3.0 x 10^8.
^ meaning to the power
Answer:
6.74 x 10¹⁴Hz
Explanation:
Given parameters:
Wavelength = 4.45 x 10⁻⁷m
Speed of light = 3 x 10⁸m/s
Unknown:
The frequency of the indigo light = ?
Solution:
To solve this problem, we use the expression below;
V = f ∧
V is the sped of light
f is the frequency
∧ is the wavelength
Now insert the parameters and solve;
3 x 10⁸ = f x 4.45 x 10⁻⁷
f = 6.74 x 10¹⁴Hz
The net charge on an atom of a given element changes as ______ are added or removed.
Answer:
Answer is Electrons
Explanation:
If there is gain of electron then it will result a negative charge. And when there is loss of electrons it will result in the formation of positive charge iron.
the heating coil of a water heater has a resistance of 20 ω and operates at 210 v. how long does it take to raise the temperature of 200 kg of water from 15oc to 80oc?
The heating coil of a water heater has a resistance of 20 ω and operates at 210 v. It takes 5 hrs to raise the it take to raise the temperature of 200 kg of water from 15oc to 80oc.
What is resistance?Obstruction is a proportion of the resistance to flow stream in an electrical circuit. Opposition is estimated in ohms, represented by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who concentrated on the connection between voltage, current and opposition. In any case, obstruction and conductance are broad as opposed to mass properties, implying that they additionally rely upon the size and state of an item. Channels permit the free progression of power. Yet, in materials, for example, semiconductors and covers, the power encounters a specific power that goes against the free progression of electrons.
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A balloon and your hair have a neutral charge. There is no net charge since there are equal positive and negative charges. This is an example of an __________________
A inference
B observation
C hypothesis
D radiation
For a given force as time ___
the impulse related to that force increases. *
A. increases
B. decreases
Answer:
Increases
Explanation:
For a given force, as the time increases, the impulse related to that force increases also.
Impulse and time are directly related to one another. Impulse is mathematically given as:
I = F t
I is the impulse
F is the force
t is the time taken
So, as both force and time increases, the value of the impulse must increase.
21.
Figure 1 shows a person sliding down a zip wire.
Figure 1
Zip wire
Change
in vertical
height
(a) As the person slides down the zip wire, the change in the gravitational potential energy
of the person is 1.47 kJ
Eg=m
The mass of the person is 60 kg
gravitational field strength = 9.8 N/kg
Calculate the change in vertical height of the person.
The change in the vertical height of the person is obtained as 2.5 m.
What is the change in the height?Let us recall that gravity is a universal force of attraction that acts on any object that is found to be on the surface of the earth. It is instructive to know that gravity can only be an attractive force.
As the person slides down the zip wire, the position of the person is changing. We have to know that the gravitational potential energy of the person is dependent on the position of the wire. As such, as the position changes, the gravitational potential energy of the person is also changing.
Using the formula;
W = mgh
W = gravitational potential energy
m = mass of the object
g = acceleration due to gravity
h = height of the body
If we substitute the values we have;
h = W/mg
h = 1.47 * 10^3/ 9.8 * 60
h = 2.5 m
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What statement provides an example of designing a solution in the technological design process? Aerospace engineers need a lightweight material to build a jet. Engineers determine which features the material must have. Engineers test a carbon-plastic compound in a wind tunnel. The carbon-plastic compound is redesigned to save maximum energy.
Answer:
Engineers determine which features the material must have.
Explanation:
The statement provides an example of designing a solution in the technological design process is B. Engineers determine which features the material must-have.
what is the procedure for designing answers to technological issues?Steps of the technological layout system encompass: pick out trouble, research the hassle, generate possible answers, pick out the fine solution, create a version, test the model, refine and retest the model as wished, and talk the final answer.
What is a design solution?The design answer definition can be used to generate the quit product specifications with a view to be used to produce the product and to conduct product verification. This technique may be in addition delicate depending on whether or not there are extra subsystems of the quit product that need to be defined.
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a(n) is a rock in space when it enters a planets atmosphere it is a(n) any piece remaning after inmpact is an
A meteoroid is a rock in space when it enters a planet's atmosphere it is a meteor, any piece remaining after impact is a meteorite.
Meteoroids are small objects floating in space. They are made up of rocks, iron, and dust. In our solar system, meteoroids orbit the Sun and some planets.
When these meteoroids enter the atmosphere of earth, they become meteors. These meteors started to burn and shine due to friction.
Meteorites are the surviving un-burnt piece of meteors that hit the surface of the Earth.
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Gabriella and Michelle are a few meters apart, at one end of a football field. Pierre is at the other end of the field, and he sees both of the them moving toward him 4m/s. From Michelle's point of view, how is Gabriella moving?
Group of answer choices
Gabriella is moving toward her at 8m/s
Gabriella is moving away from her at 4 m/s
Gabriella is moving toward her at 4 m/s
Gabriella is not moving
Answer:
Gabriella is not moving
Explanation:
This type of problem can be solved by having the concept of relative velocities clear. Two bodies move at Equal velocity 4 [m/s] towards Pierre. But they ask us about how Michelle sees Gabriella moving.
Since Gabriela moves at the same speed as Michelle, when Gabriela turns her head to see Michelle, she doesn't seem to move faster or slower than she does.
A classic example is when we are passengers of a car and in a window next door we see, a car next to us, this car seems static before our eyes, but we are aware that it moves at a speed equal to that of the vehicle we occupy.
Magnesium is a metal that is commonly used in products that needed to be light weight. Suppose a 2.00kg piece of magnesium has 8160 j of entertainment added to it it's temperature increases 4K what is the specific heat of magnesium
Given that,
Mass of magnesium, m = 2 kg
Heat added to it, Q = 8160 J
Increase in temperature, [tex]\Delta T=4\ K[/tex]
To find,
The specific heat of magnesium.
Solution,
Th formula that is used to find the heat required to raise the temperature in terms of specific heat is given by :
[tex]Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{8160\ J}{2\ kg\times 2\ K}\\\\c=2040\ J/kg-K[/tex]
So, the specific heat of magnesium is [tex]2040\ J/kg-K[/tex].
20.0 m [N] - 15 m [S20degreesE]
Answer:
thank for making me give up on life
Explanation:
I thought the stuff I had was hard wth is even that
A runner is jogging in a straight line at a
steady vr= 8.2 km/hr. When the runner is
L= 2.5 km from the finish line, a bird begins
flying straight from the runner to the finish
line at vb= 41 km/hr (5 times as fast as the
runner). When the bird reaches the finish
line, it turns around and flies directly back to
the runner.
What cumulative distance does the bird
travel? Even though the bird is a dodo, assume that it occupies only one point in space
(a “zero” length bird), travels in a straight
line, and that it can turn without loss of
speed.
Answer in units of km.
The cumulative distance traveled by the bird is 3.12 km.
Cumulative distance of the bird
The cumulative distance of the bird is calculated as follows;
Apply the principle of relative velocity.
Vbt - Vrt = L
(Vb - Vr)t = L
where;
Vb is the velocity of the birdVr is the velocity of the runnert is time of motionSubstitute the given parameters and solve for time of motion,
(41 - 8.2)t = 2.5
32.8t = 2.5
t = 2.5/32.8
t = 0.076 hr
Distance traveled by the bird = 0.076hr x 41 km/hr = 3.12 km
Thus, the cumulative distance traveled by the bird is 3.12 km.
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A girl is running in a long distance race. As she runs, her respiration rate 10 points increases. Her body cells must process energy at a faster rate to power her muscles as she runs. Is this action a response to internal stimuli or external stimuli?
A. internal stimuli
B. external stimili
Give an example where the vectorial nature of velocity would be important when solving a problem.
Answer:
There are instances when the vectorial component or nature are important in solving problems.
Explanation:
The directional component of the velocity vector might become very important in some situations
Velocity problems involving topography; whether the velocity situation involves uphill or downhill for instance would have significant impact on the equation being solved, as deceleration or acceleration might occur, which would affect the velocity.
The resultant velocity of the boat and the river can be calculated by the application of vector diagram resulting to Pythagorean's theorem.
Velocity is a distance travelled in a specific direction per time taken. Velocity is a vector quantity and some questions involving velocity can be solved vectorially.
An example where the vectoral nature of velocity would be important when solving a problem will be a scenario where a boat is moving perpendicularly across a flowing river of high current.
Let assume that the river is flowing in west - east direction with a certain velocity. And the boat is moving across the river in north - south direction with a specific velocity.
The resultant velocity of the boat and the river can be calculated by the application of vector diagram resulting to Pythagorean's theorem.
Therefore, the vectoral nature of velocity will be important when solving a resultant velocity problem of a boat crossing a flowing river.
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An iron bal of mass 20kg is rolling on a flat surface. On applying force, the velocity change from 17ms to 27m/s in 5s. Calculate the magnitude of the force. (Ans:40N)
Answer:
40 N
Explanation:
We first need to calculate the acceleration of the tron ball.
Since acceleration, a = (v - u)/t where u = initial velocity of iron ball = 17m/s, v = final velocity of iron ball = 27m/s and t = time taken for the change in velocity = 5 s.
So, a = (v - u)/t
= (27 m/s - 17 m/s)/5 s
= 10 m/s ÷ 5 s
= 2 m/s²
We know force on iron ball, F = ma where m = mass of iron ball = 20 kg and a = acceleration = 2 m/s²
So, F = ma
= 20 kg × 2 m/s²
= 40 kgm/s²
= 40 N
So, the magnitude of the force on the iron ball is 40 N.
ILL GIVE BRAINLIEST IF UR CORRECT
Answer:
B is the answer.
Explanation:
Science: Please help due in 5 minutes...
Answer:
fossil fuels are petroleum and natural gas. Well Fossils are mineralized remains of ancient plants and animals