Answers
Answer:
the answer is the red super giants
Related Questions
How do you make a mirages?
Answers
Answer: when the ground is very hot and the air is cool. The hot ground warms a layer of air just above the ground. When the light moves through the cold air and into the layer of hot air it is refracted (bent). A layer of very warm air near the ground refracts the light from the sky nearly into a U-shaped bend.
Explanation:
Just a thought
If you had let’s say two pieces of glass one being much more rudder than the other, and you try to break the tougher glass with the other piece
Example: throwing a glass ball at a glass door
Question: is it possible to break a tougher piece of glass with a weaker piece of glass ?
Suspicion: I’m guessing at high speeds it’s possible but I’m not sure anyone care to put their input ?
Answers
Answer:
Explanation:
THE FOURTEEN WEEKS' COURSES
IN
NATURAL SCIENCE,
BY
J. DORMAN STEELE, A.M., PHI.D.
Fourteen Weeks iq Natural Philosophy,
Fourteen Weeks iq Ctlenqistry,
Fourteen Weeks iq Descriptive Astroqonqy,
Fourteel Weeks iq Popular Geology,
Fourteeq Weeks iQ2 Human P1ysiology,
Fourteen Weeks iq Zoology,
Fourteeq Weeks iq Botany,
A Key, containing Answers to the Questions
and Problems in Steele's I4 Weeks' Courses,
4 1ISTORIC4L SERIES,
ON THE PLAN OF STEELE'S 14 WEEKS IN THE SCIENCES.
A Brief History of the Urlited States,
A Brief History of France,
The same publishers also offer the following standard scientific
vworks, being more extended or difficult treatises than those of
Prof. Steele, though still of Academic grade.
Peck's Ganot's Natural Philosophy,
Porter's Principles of Chemistry,
Jarvis' Physiology and Laws of Healtl,
Wood's Botanist and Florist,
Clanlbers' Elenments of Zoology,
lcIqtyre's Astroqomy and tle Globes,
Page's. Elen~ents of Geology,
Entered according to Act of Congress, in the year 1869, by
A. S. BARNES & CO.,
In the Clerk's Office of the District Court of the United States
for the Southern District of New York.
sTERLE'S KEY.
You throw a tennis ball straight up. Air resistance can be neglected.
(a) The maximum height above your hand that the ball reaches is H. At what speed does the ball leave your hand?
(b) What is the speed of the ball when it is a height H/2 above your hand? Express your answer as a fraction of the speed at which it left your hand.
(c) At what height above your hand is the speed of the ball half as great as when it left your hand? Express your answer in terms of H.
Answers
Answer:
(a) [tex]\sqrt{2gH}[/tex]
(b) [tex]\sqrt{gH}[/tex]
(c) [tex]\frac{3u^{2}}{8g}[/tex]
Explanation:
The maximum height = H
(a) Let the speed of the ball as it leaves the hand is u.
Use third equation of motion
[tex]v^{2}=u^{2}+2as\\0 = u^{2}- 2 gH\\u=\sqrt{2 gH}[/tex]
(b) Let the speed of the ball at H/2 is v.
Use third equation of motion
[tex]v^{2}=u^{2}+2as\\v^{2} = u^{2}- 2 g\frac{H}{2}\\v^{2}=2 g H - gH = gH\\v =\sqrt{gH}[/tex]
(c) Let the height is h.
[tex]v^{2}=u^{2}+2as\\\frac{u^{2}}{4} = u^{2}- 2 gh \\\\2 g h = \frac{3u^{2}}{4}\\h =\frac{3u^{2}}{8g}[/tex]
A truck with a mass of 1520 kg and moving with a speed of 16.0 m/s rear-ends a 663 kg car stopped at an intersection. The collision is approximately elastic since the car is in neutral, the brakes are off, the metal bumpers line up well and do not get damaged. Find the speed of both vehicles after the collision in meters per second. vcar
Answers
Answer:
Speed of truck after collision = 6.28 m/s
Speed of car after collision = 22.28 m/s
Explanation:
By law of conservation of momentum
momentum before collision = momentum after collision
[tex]m_1u_1+m_2u_2 = m_1v_1+m_2v_2\\plugging/values\\1520\times16+ 0= 1520\times v_1 + 663\times v_2\\24320= 1520v_1+663v_2[/tex]
Since, collision is elastic
[tex]16 = v_2-v_1///v_2 = v_1+16 ....(b)[/tex]
solving the above two equations we get
v_1 = 6.28 m/s and v_2 = 22.28 m/s
Speed of truck after collision = 6.28 m/s
Speed of car after collision = 22.28 m/s
सत्मार्ग र शान्तिले नै समाजलाई सभ्य बनाउँछ भन्ने विषयमा ५० शब्दसम्मको एउटा अनुच्छेद
लेख्नुहोस्।
Answers
Answer:
So you have a question
Explanation:
either way have a nice day
If an electromagnetic wave has a frequency of 6 x 105 Hz, what is its
wavelength? Use 1 = The speed of light is 3 x 108 m/s.
f
v
A. 2 x 10-3 m
B. 5 x 1014 m
C. 5 x 102 m
D. 2 x 1012 m
Answers
Answer:
500 m
Explanation:
Applying,
v = λf.................... Equation 1
Where v = speed of light, λ = wave length, f = frequency of light.
make λ the subject of the equation
λ = v/f............... Equation 2
From the question,
Given: v = 3×10⁸ m/s, f = 6×10⁵ Hz
Substitute these values into equation 2
λ = 3×10⁸/6×10⁵
λ = 500 m
Volcanic process refers to the eruptive and noneruptive activities that occur on a volcano. Volcanic activities usually
results if one of the following happens: A). Deep within the core of the Earth, it is so hot that some rocks melt and
become a thick and sticky substance called (16)_
Magma B) This substance gets hotter and hotter and pressure
builds deep in the (17)
of the volcano. C) Eventually, magma will push up toward the surface of the
Earth through the volcano's crater and escape through vents in the earth. D) When magma erupts from the volcano, it is
called (18)
During an eruption, volcanic asin and ouiet rock pa licies called (19)
alsu escape
violently into the air and can cause major damage to the volcano's surrounding environment. E) (20)
that erupts from the volcano will fall back down onto the Earth like powdery snow that can cover and suffocate
anlants and animals and also contaminate streams and rivers.
Answers
The take-up reel of a cassette tape has a radius of 2.5 cm. Find the length of the tape that passes around the reel in 7.1 s when the reel rotates at an average angular speed of 1.9 rad/s.
Answers
Answer:
s = 0.337 m
Explanation:
First, we will find the angular displacement of the reel:
[tex]\theta = \omega t[/tex]
where,
θ = angular displacement = ?
ω = angular speed = 1.9 rad/s
t = time taken = 7.1 s
Therefore,
θ = (1.9\ rad/s)(7.1 s)
θ = 13.5 rad
Now, we will find out the length of tape:
s = rθ
where,
s = length of tape = ?
r = radius of reel = 2.5 cm = 0.025 m
Therefore,
s = (0.025 m)(13.5 rad)
s = 0.337 m
“Is it true or wrong to say that an automobile at rest can be accelerating very fast? Either yes or no explain it with mathematical background
Answers
Answer:
Yes.
a = dv/dt
but v might be zero in an instant.
Take the example of a pendulum.
Acceleration is defined as the rate of change of the velocity of the body. Yes, an automobile at rest can accelerate very fast.
What is acceleration?Acceleration is defined as the rate of change of the velocity of the body. Its unit is m/sec².It is a vector quantity. It requires both magnitudes as well as direction to define.
[tex]\rm a=\frac{dv}{dt}[/tex]
a is the acceleration of the body
dv is the change of velocity of the body
dt is the change in the time interval
The acceleration is defined as the change in velocity, and the slope of velocity is found as acceleration. It can be said that the body is at rest its velocity is zero.
The acceleration of the body can be increased when the body changes its direction. So the moment at which the body changes the direction the body is at rest after that the body can accelerate.
To learn more about acceleration refer to the link;
https://brainly.com/question/969842
problema de coeficiente de rozamiento
Answers
If you take the positive horizontal direction to be to the right (the same direction as F₂), then by Newton's second law, the block has
• a net horizontal force of
∑ F = F₁ cos(-50°) + F₂ - f = m a
• a net vertical force of
∑ F = F₁ sin(-50°) + n - m g = 0
where
• f = µ n = magnitude of friction
• µ = coefficient of kinetic friction
• n = magnitude of the normal force
• m = 20 kg
• a = acceleration of the block
Solve for n :
n = m g + F₁ sin(50°)
n = (20 kg) (9.80 m/s²) + (50 N) sin(50°)
n ≈ 234.302 N
If the block accelerates uniformly from rest with acceleration a, then this acceleration is equal to its average, given by
a = ∆v / ∆t = (9 m/s - 0) / (3 s) = 3 m/s²
Solve for f :
f = F₁ cos(50°) + F₂ - m a
f = (50 N) cos(50°) + 80 N - (20 kg) (3 m/s²)
f ≈ 52.1394 N
Solve for µ :
µ = f / n
µ ≈ (52.1394 N) / (234.302 N)
µ ≈ 0.22253 ≈ 0.22
What type of boundary creates earthquakes? What type of boundaries create volcanoes? Compare and contrast these two types of plate movements, and explain how these geologic events occur.
Answers
Answer:
The three types of plate boundaries are Convergent, Divergent and Transform.
The convergent plate boundary is when two plates move towards each other. In this case it has three possibilities:
An oceanic-continental convergent: In this case the the oceanic plate goes beneath the continental in a subduction zone. And due to this process, the continental crust crumples and forms mountains.
An oceanic-oceanic convergent: Here the denser plate goes beneath the other in a subduction zone.
A continental-continental convergent: And in this case the thickness of the crust doubles as the convergent makes mountains.
The divergent plate boundary is when two plates move away from each other. This type of plate boundaries happens between the same plate type, this way it has two possibilities:
An oceanic-oceanic divergent: In this case when two plates goes apart, the magma from the mantle goes up to fill the gap that the separation made.
A continental-continental divergent: And here it’s characterized by rift valleys.
The third and last type is the transform plate boundary. And this one happens when two plates slide along each other horizontally.
this is the correct answer
please mark brainliest
If a team of workers comes to a consensus, what probably happened in the meeting?
A. They compromised with each other to reach an agreement.
B. They disagreed and were unable to come to a decision.
OC. They were forced by their manager to follow a new policy.
O D. They all turned in their letters of resignation.
Answers
Answer:
A
Explanation:
A consensus is when you come to an agreement
A Ring, a solid Cylinder and a solid sphere all having the same mass and the Same radius are held at the top of an inclined plane if the objects are roll without slipping and the (see the picture)between each object and the plane is 0.3 if they are released from an incloed plane at the same time which wal bee reach the bottom first?
Answers
Answer:
Since they all have the same mass and radius they all experience the same amount of torque.
Torque = moment of inertia * angular acceleration
The one with the smallest moment of inertia will experience the greatest angular acceleration and thus reach the bottom first.
I = M r^2 ring
I = 1/2 M r^2 cylinder
I = 2/5 M r^2 sphere
The sphere will reach the bottom first.
ejemplos de fisica teorica
Answers
Modelos analógicos de gravedad.
Big Bang.
Causalidad.
Teoría del caos.
Teoría clásica de campos.
Mecanica clasica.
Física de la materia condensada (incluida la física del estado sólido y la estructura electrónica de los materiales)
Ley de conservación.
Answer:
Campo (física)
Computación cuántica.
Conservación de la energía.
Cosmología física.
Cromodinámica cuántica.
Dinámica.
Electrodinámica cuántica.
Electroquímica cuántica.
g You shine orange laser light that has a wavelength of 600 nm through a narrow slit. The slit forms a diffraction pattern on a distant screen that has been set up behind the slit. The first dark fringe in the diffraction pattern is 4.0 cm from the center point of the pattern. If you replace the orange laser with an unknown laser and observe that the second dark fringe of the diffraction pattern appear at 4.0 cm from the center point, what is the wavelength of the unknown laser
Answers
Answer:
λ = 3 10⁻⁷ m, UV laser
Explanation:
The diffraction phenomenon is described by the expression
a sin θ = m λ
let's use trigonometry
tan θ = y / L
as in this phenomenon the angles are small
tan θ = [tex]\frac{sin \ \theta}{cos \ \theta}[/tex] = sin θ
sin θ = y / L
we substitute
a y / L = m λ
let's apply this equation to the initial data
a 0.04 / L = 1 600 10⁻⁹
a / L = 1.5 10⁻⁵
now they tell us that we change the laser and we have y = 0.04 m for m = 2
a 0.04 / L = 2 λ
a / L = 50 λ
we solve the two expression is
1.5 10⁻⁵ = 50 λ
λ = 1.5 10⁻⁵ / 50
λ = 3 10⁻⁷ m
UV laser
8 A car accelerates at a rate of 10m/s
for a time of 4s and it reaches a speed of 52m/s . calculate the initial value
Answers
Answer:
From the First Law of Motion
Vf = Vi + at
"It reaches a speed of 52m/s" meaning the Final speed Vf=52
a(acceleration)=10m/s²
t=4s
Applying the formula
52=Vi + 10(4)
Vi = 52-40
Vi = 12m/s
a 60 kg pupil runs for 600m in 1 minute uniformly calculate kinetic energy
Answers
velocity = traveled distance ÷ time of the traveled distance is seconds
velocity = 600 ÷ 60
velocity = 10 m/s
_________________________________
Kinetic Energy = 1/2 × mass × ( velocity )^2
KE = 1/2 × 60 × ( 10 )^2
KE = 30 × 100
KE = 3000 j
what makes molecules move. A. covection. B. Radiation. C. Thermal or heat. D. conduction.
Answers
Answer:
the answer is C
Explanation:
1. A 2,000-turn solenoid is 65 cm long and has cross-sectional area 30 cm2. What rate of change of current will produce a 600 Volts emf in this solenoid.
Answers
Answer:
[tex]\frac{dI}{dt} = 2.59\ x\ 10^4\ A/s[/tex]
Explanation:
First, we will calculate the inductance of the solenoid by using the following formula:
[tex]L = \frac{\mu_o AN^2}{l}[/tex]
where,
L = self-inductance of solenoid = ?
μ₀ = permeability of free space = 4π x 10⁻⁷ N/A²
A = Cross-sectional area = 30 cm² = 3 x 10⁻³ m²
N = No. of turns = 2000
l = length = 65 cm = 0.65 m
Therefore,
[tex]L = \frac{(4\pi\ x\ 10^{-7}\ N/A^2)(3\ x\ 10^{-3}\ m^2)(2000)^2}{0.65\ m}\\\\L = 0.0232\ H[/tex]
Now, we will use Faraday's law to calculate the rate of change of current:
[tex]emf = L\frac{dI}{dt}\\\\ \frac{dI}{dt} =\frac{emf}{L} \\\\ \frac{dI}{dt} =\frac{600\ V}{0.0232\ H}\\\\ \frac{dI}{dt} = 2.59\ x\ 10^4\ A/s[/tex]
A 4.50-kg centrifuge takes 200 s to spin up from rest to its final angular speed with constant angular acceleration. A point P located 10.0 cm from the axis of rotation of the centrifuge moves with a speed of 150 m/s when the centrifuge is at full(final) speed. a) [4 points] What was its final angular speed
Answers
Answer:
Explanation:
ω = v / R
where ω is angular speed of a point situated at distance R from axis and having a linear speed of v .
Given v = 150 m/s ; R =.10 m
ω = 150 / .10
= 1500 radian /s .
Final angular speed is 1500 radian /s .
Velocity is the speed at which an object moves in a specific direction. It's measured in meters per second, minute or hour in a particular direction—like miles per hour going north, kilometers per minute west or meters per second up. Velocity tells us both the speed and direction we are traveling. Acceleration is a change in velocity. It's measured by subtracting the object's starting velocity from the final velocity, divided by the time this change in velocity took. We usually think of acceleration as speeding up, but it can also mean slowing down. We call this negative acceleration or deceleration. If a car was driving 45 miles per hour northeast, and is now driving 30 miles per hour north, A the car’s velocity decelerated. B the car’s velocity accelerated. C the car’s velocity remained unchanged. D the car’s acceleration is 30 miles per hour.
Answers
Answer:
Option A. The car’s velocity decelerated
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 45 mph Northeast
Final velocity (v) = 30 mph North
Now, if we take the difference between the car's final velocity and it's Initial velocity, we shall obtained:
Difference in velocity = v – u
Difference in velocity = 30 – 45
Difference in velocity = –15 mph
Since the difference between the final velocity and the initial velocity of the car is negative, it implies that the car's velocity decelerated.
Thus, option A gives the correct answer to the question
What is the electric field at a distance of 3 cm from 4 mC
of negative charge?
ucharee
Answers
Answer:
The magnitude of the electric field experienced by the charge is 4 x 10¹⁰ N/C.
Explanation:
Given;
magnitude of the charge, q = 4 mC = 4 x 10⁻³ C
distance of the charge, r = 3 cm = 0.03 m
The magnitude of the electric field is calculated as follows;
[tex]E = \frac{F}{q} = \frac{Kq}{r^2} \\\\[/tex]
where;
K is Coulomb's constant, = 9 x 10⁹ Nm²/C²
[tex]E = \frac{Kq}{r^2}\\\\E = \frac{(9\times 10^9)(4 \times 10^{-3})}{0.03^2} \\\\E = 4 \times 10^{10} \ N/C[/tex]
Therefore, the magnitude of the electric field experienced by the charge is 4 x 10¹⁰ N/C.
Cora’s doctor suspects that she has acid reflux. He prescribes
for her.
Answers
Answer: antacids
Explanation: Excess acid secretion in the stomach often causes nausea, chest pain, and leaves a bitter taste in the mouth. Doctors perscribe antacids to neutralize the acid.
Answer: antacids
Explanation: Excess acid secretion in the stomach often causes nausea, chest pain, and leaves a bitter taste in the mouth. Doctors perscribe antacids to neutralize the acid.
how are force and motion related
Answers
Even if it just pushing a piece of paper you still use force to put the paper in motion!
if 36C ofcharge pass through a write in 4s current is it carrying?
Answers
Answer:
The current flowing through the wire is 9 A.
Explanation:
Given;
quantity of charge passing through the wire, Q = 36 C
duration of the charge flow, t = 4 s
The current flowing through the wire is calculated as;
Q = It
I = Q / t
where;
I is the current flowing in the wire
I = 36/4
I = 9 A
Therefore, the current flowing through the wire is 9 A.
. Two identical vehicles traveling at the same speed are made to collide with barriers in an insurance company collision test. The first vehicle collides with a concrete barrier, and stops in a time of approximately 0.1 s. The second vehicle collides with a collapsible barrier, and comes to rest in about 1 second. Which object is subject to a larger force
Answers
Answer:
F₁ / F₂ = 10
therefore the first out is 10 times greater than the second barrier
Explanation:
For this exercise let's use the relationship between momentum and momentum.
I = F t = Δp
in this case the final velocity is zero
F t = 0 -m v₀
F = m v₀ / t
in order to answer the question we must assume that the two vehicles have the same mass and speed
concrete barrier
F₁ = -p₀ / 0.1
F₁ = - 10 p₀
barrier collapses
F₂ = -p₀ / 1
let's look for the relationship of the forces
F₁ / F₂ = 10
therefore the first out is 10 times greater than the second barrier
1. A ford engine is provided with 80,000 W power by burning its fuel. The engine produces a kinetic energy of 96 kJ for 20 seconds before its cut out.
a. Calculate the output power by the engine in watts.
b. What is the efficiency of the engine?
c. Why is there a considerable difference in the power input and output?
Answers
Answer: a) 4800 W b) 6 % c) most of the energy of fuel is converted to heat in combustion engine
Explanation: a) Power P = W/t = 96 000 J / 20 s = 4800 W
b) efficiency η = P(putput) / P(intake) = 4800 W / 80000 W = 0,06
A vehicle reaches a speed of 7.5 m/s over 15 seconds. What is its acceleration if it
starts from rest?
a. -0.5 m/s2
b. 0.5 m/s?
c. 2 m/s?
d. 22.5 m/s2
Answers
[tex]acceleration = \frac{velocity}{time} = \frac{7.5}{15} = 0.5ms^-^2[/tex]
So the answer is option b.
Draw Aufbua diagram of sodium ion
Answers
Answer:
Aufbau diagram of sodium ion:
2s²,2p⁶,3s¹
Bob uses a wheelbarrow to move soil from his garden to a new flowerbed. He exerts an average force of 185 N while pushing the wheelbarrow, and he does 6.1 kJ of work while moving each load of soil. How far is he moving the soil?
A. 0.026 m
B. 0.039 m
C. 26 m
B. 39 m
Answers
Answer:
A. reduce the amount of soil by one-half and apply the same amount of force
Explanation: