Answer:
Opposite
Explanation:
Waves that hit a fixed boundary return to the starting point on the opposite side that it began.
After striking, the wave gets reflected and it moves in the direction opposite to the initial direction.
Hence, it would mean that waves that hit a fixed boundary return to the starting point on the opposite direction.
Describe any major landmarks (buildings, bridges, historical sites, etc.) that were destroyed during the valdivia earthquake.
Answer:
Homes, Workplaces, Statues, Meuseums
Explanation:
if you did look into it you would know after the earthquake there was a tsunami which flooded alot of places, this made many homeless, jobless, and many lossing vaklueable things
Problem 7:esvoe71017425b601f756a59bc7b76d2f39502730941492c25f1dd66c7ed01e4bb38ceovse 0N86-C1-52-40-A837-22820 If object A is twice the mass of object B what can be said about their kinetic energies just as they hit the ground
Answer:
the kinetic energy of A will be twice that of B
Explanation:
The formula for calculating kinetic energy is expressed using the formula
KE = 1/2mv²
m is the mass of the object
v is the velocity
For object A:
KEA = 1/2mAvA²
For object B:
KEB = 1/2mBvB² ... 1
If object A is twice the mass of object B, then mA = 2mB
From 1:
KEA = 1/2mAvA²
Substitute mA = 2mB
KEA = 1/2(2mB)vA² .... 2
Divide 1 by 2
KEB/KEA = 1/2mBvB²/mBvA²
KEB/KEA = 1/2vB²/vA²
Assuming they have the same velocities then vA ,= VB
The equation becomes:
KEB/KEA = 1/2vB²/vA²
KEB/KEA = 1/2vB²/vB²
KEB/KEA = 1/2
KEA = 2EB
Hence the kinetic energy of A will be twice that of B
What is the magnetic field strength at a point 2.5 mm radially from the center of the wire leading to the capacitor
Complete Question
A 8.0 A current is charging a 1.0 -cm-diameter parallel-plate capacitor. What is the magnetic field strength at a point 2.5 mm radially from the center of the wire leading to the capacitor?
Answer:
The magnetic field is [tex]B = 6.4*10^{-4} \ T[/tex]
Explanation:
From the question we are told that
The current is [tex]I = 8.0 \ A[/tex]
The diameter is [tex]d = \ cm = \frac{1}{100} = 0.01 m[/tex]
The position considered is [tex]d = 2.5 \ mm = 0.0025 \ m[/tex]
Generally the magnetic field is mathematically represented as
[tex]B = \frac{\mu_o * I }{ 2 \pi d}[/tex]
Here [tex]\mu_o[/tex] is permeability of free space with value
[tex]\mu_o = 4\pi * 10^{-7} \ N/A^2[/tex]
So
[tex]B = \frac{ 4\pi * 10^{-7} * 8 }{ 2 \pi * 0.0025 }[/tex]
=> [tex]B = \frac{ 2 * 10^{-7} * 8 }{ * 0.0025 }[/tex]
=> [tex]B = 6.4*10^{-4} \ T[/tex]
What are electromagnetic waves?
Answer:
Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields. They are also perpendicular to the direction of the EM
Explanation:
A material that reflects or absorbs all the light that strikes it is
A. opaque.
B. transparent.
C. translucent.
D. primary.
Answer:
b. transparent
Explanation:
Photons interact with an object by some combination of reflection, absorption and transmission. Some materials, such as plate glass and clean water, transmit much of the light that falls on them and reflect little of it; such materials are called optically transparent.
Which example is most likely made from both metals and gemstones?
Answer:
A Necklace is most likely made from both metals and gemstones
Explanation:
Brainliest?
Acceleration and force are proportional
Answer:
whats the question tho
1) An object of mass (m=2.0 kg) is given an acceleration given by a=3.0 i +4.0j.
The magnitude of the applied force in (N) is:
By Newton's second law, the net force on the object is
F = m a
F = (2.0 kg) ((3.0 i + 4.0 j ) m/s²)
F = (6.0 i + 8.0 j ) N
which has a magnitude of
F = √((6.0 N)² + (8.0 N)²) = √(100 N²) = 10 N
A sports car accelerates from 0 to 25 meters per second in 4 seconds. What is its acceleration?
Question 1 options:
10ms2
6.25 ms2
25ms
0ms
20pts
Answer:
6.25 ms²
Explanation:
..................
A 23 g bullet is accelerated in a rifle barrel 62 cm long to a speed of 593 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.
Answer:
The average force exerted on the bullet while it is being accelerated is 6,522.52 N.
Explanation:
Given;
mass of the bullet, m = 23 g = 0.023 kg
length of the barrel, L = 62 cm = 0.62 m
speed of the bullet, v = 593 m/s
Applying work-energy theorem;
the work done in accelerating the bullet in the riffle = kinetic energy acquired by the bullet.
W = K.E
F x d = ¹/₂mv²
where;
d is the is the distance traveled by the bullet in the riffle = L
F(0.62) = ¹/₂ x 0.023 x (593²)
F(0.62) = 4043.964
F = (4043.964) / (0.62)
F = 6,522.52 N
Therefore, the average force exerted on the bullet while it is being accelerated is 6,522.52 N.
What causes the Earth's spherical shape
Answer:
spherical shape
Explanation:
The Earth is massive enough that the pull of gravity maintains its roughly spherical shape. Most of its deviation from spherical stems from the centrifugal force caused by rotation around its north-south axis. This force deforms the sphere into an oblate ellipsoid.
How fast is the runner moving between 2-3 seconds? Is the other question please help
Answer:
Concept: Physics analysis
We have a distance vs time graph That indicates that we are analyzing the distance traveled by either a person or a particle The runner starts at 4 meters and over the interval of a second runs to 12 meters reaching the 16 meter mark. The runner stood at 16 meter mark for one full second and then runs back 10 meter over the course of one second reaching 6 meter. The runner runs forward again for a second traveling 6 meters, ending at the 12 meter mark.An industrious beaver manages to chew through the base of a wooden tree trunk 18 m tall, causing it to fall over. If the base of the trunk does not slide while it falls over, how fast is the other end of the trunk moving right before it hits the ground
Answer:
Vf = 18.78 m/s
Explanation:
As, the block does not trunk does not slide while falling. hence, we can use third equation of motion to find its velocity before it hits the ground:
2gh = Vf² - Vi²
where,
g = acceleration due to gravity = 9.8 m/s²
h = Height of Trunk = 18 m
Vf = Velocity of trunk just before it hits the ground = ?
Vi = Initial Velocity of the trunk = 0 m/s
Therefore, using these values in the equation, we get:
(2)(9.8 m/s²)(18 m) = Vf² - (0 m/s)²
Vf = √(352.8 m²/s²)
Vf = 18.78 m/s
Suppose an astronaut floating in space throws a rock. What will happen to the rock?
Answer:
C
Explanation:
If you drop a rock from 700 meters high, how long will it take the hit the ground? (Remember to make height negative when solving because it is falling)
Answer:
it would be 11.95 seconds
Explanation:
sorry for saying i did not know
I need help with this answer
Answer:
double replacement
Explanation:
sorry if im wrong
Select the correct answer.
Which of Newton's laws explains why your hands get red when you press them hard against a wall?
ОА.
Newton's law of gravity
OB.
Newton's first law of motion
O c.
Newton's second law of motion
OD.
Newton's third law of motion
Answer:
D. Newton's third law of motion
A 4-foot spring measures 8 feet long after a mass weighing 8 pounds is attached to it. The medium through which the mass moves offers a damping force numerically equal to 2 times the instantaneous velocity. Find the equation of motion if the mass is initially released from the equilibrium position with a downward velocity of 3 ft/s. (Use g
Answer:
[tex]\mathbf{x = 3te ^{-2 \sqrt{2t}}}[/tex]
Explanation:
From the given information concerning the spring-mass system:
Let us apply Hooke law.
Then, we have:
mg = ks
8 = k4
k = 8/4
k = 2
Provided that the mass weighing 8 lbs is attached to a spring.
Then, we can divide it by gravity 32 ft/s².
∴
m = 8/32
m = 1/4 slugs
The medium that offers the damping force [tex]\beta = \sqrt{2}[/tex]
Now, let us set up a differential equation that explains the motion of the spring-mass system.
The general equation is:
[tex]mx '' + \beta x' + kx = 0[/tex]
where;
[tex]m = \dfrac{1}{4}[/tex]
k = 2, and
[tex]\beta = \sqrt{2}[/tex]
Then;
[tex]\dfrac{1}{4}x'' + \sqrt{2} x' + 2x = 0[/tex]
By solving the above equation, the auxiliary equation is:
[tex]m^2 + 4 \sqrt{2} m + 8n = 0[/tex]
Using quadratic formula:
[tex]\dfrac{-b \pm \sqrt{b^2 -4ac}}{2a}[/tex]
[tex]m = \dfrac{-4 \sqrt{2} \pm \sqrt{(4 \sqrt{2})^2 -4(1)(8) }}{2}[/tex]
[tex]m = \dfrac{-4 \sqrt{2} \pm \sqrt{32 -32 }}{2}[/tex]
[tex]m = -2 \sqrt{2}[/tex]
Since this is a repeated root, the solution to their differential equation took the form.
[tex]x_c = c_1 e^{mt} + c_2 t e^{mt}[/tex]
[tex]x_c = c_1 e^{-2\sqrt{2} t} + c_2 t e^{-2\sqrt{2} t}[/tex]
From the initial condition.
At equilibrium position where the mass is being from:
x(0) = 0
Also, at the downward velocity of 3 ft/s
x'(0) = 3
Then, at the first initial condition:
[tex]x_c (0) = c_1 e^{-2\sqrt{2} *0} + c_2 (0) e^{-2\sqrt{2} *0}[/tex]
[tex]0= c_1 e^{0} + 0[/tex]
[tex]0= c_1[/tex]
At the second initial condition;
[tex]x' = -2 \sqrt{2} c_1 e^{-2 \sqrt{2} t } -2 \sqrt{2} c_2 t e^{-2 \sqrt{2} t } + c_2 e^{-2 \sqrt{2} t}[/tex]
where;
x'(0) = 3
[tex]x' (0) = -2 \sqrt{2} c_1 e^{-2 \sqrt{2}* 0 } -2 \sqrt{2} c_2 (0) e^{-2 \sqrt{2} *0 } + c_2 e^{-2 \sqrt{2} *0}[/tex]
[tex]3 = -2 \sqrt{2} * 0 *e^0 - 0 + c_2 e^0[/tex]
[tex]3 = 0 + c_2[/tex]
[tex]3 = c_2[/tex]
Replacing in the constraints, the equation of the motion is:
[tex]\mathbf{x = 3te ^{-2 \sqrt{2t}}}[/tex]
A student walks 4 blocks east, 7 blocks west, 1 block east and then 2 blocks west in an hour what is their velocity
Answer:
4 blocks west is final displacement. So 4 blocks per hour
a ship sonar sends message and recives the eschoes from the ocean bottom 0.6 second after the sound is sent down the ship how deep is the water beneath the ship
Answer: 600 feet
Explanation:
How do gamma rays use electromagnetic waves to function....PLS HELP
Answer:
Gamma-rays have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions.
Explanation:
Gamma-rays can kill living cells, a fact which medicine uses to its advantage, using gamma-rays to kill cancerous cells.
Hope this helps!
Brain-LIst?
Suppose a square wave signal has a 65 percent duty cycle and an on-state voltage of 40 volts DC. What is the average DC voltage
Answer:
The voltage is [tex]\= DC _v = 2.6 \ V[/tex]
Explanation:
From the question we are told that
The duty cycle is p = 65% = 0.65
The on - state voltage is [tex]V = 40 \ volt[/tex]
Generally the average DC voltage is mathematically represented as
[tex]\= DC _v = p * V[/tex]
=> [tex]\= DC _v = 40 * 0.65[/tex]
=> [tex]\= DC _v = 2.6 \ V[/tex]
Centripetal forces are always directed toward the (center, outside) of a circle.
Answer:
Centripetal forces are directed toward the center of a circle.
Hope this helps.
Explanation:
The force needed to move a body in a curved way is understood as centripetal force. Centripetal forces are always directed toward the center of a circle.
What is centripetal force?The force needed to move a body in a curved way is understood as centripetal force. This is a force that can be sensed from both the fixed frame and the spinning body's frame of concern.
The direction of centripetal force is always in the path of the center of the course.
Hence center is the right option. Centripetal forces are always directed toward the center of a circle.
To learn more about the centripetal force refer to the link;
https://brainly.com/question/10596517
Tensile stress is: A. the strain per unit length. B. the ratio of elastic modulus to strain. C. the ratio of the change in length to the original length. D. the same as force. the applied force per cross-sectional area.
Answer:
D. the same as force. the applied force per cross-sectional area.
Explanation:
Tensile stress of a material is defined as the ratio of the applied force on the material to its cross sectional area. this is expressed mathematically as;
Tensile stress = Force/cross sectional area
Tensile stress = F/A
Force is measured in newton while cross sectional area is measured in m
Hence the unit of Tensile stress is N/m²
The tensile stress is the same as force. the applied force per cross-sectional area. Hence, option (D) is correct .
The given problem is based on the concept of stress and strain. The force applied on a material per unit area is known as Stress. It is denoted by the symbol [tex]\sigma[/tex] .
And due to the applied force, the ratio of change in length to the original length is known as Strain. It is denoted by the symbol [tex]\epsilon[/tex].
And the ratio of Stress and Strain is known as Elastic modulus. That is,
[tex]E = \dfrac{stress}{strain}\\\\E = \dfrac{\sigma }{\epsilon}[/tex]
So, the tensile stress is obtained as,
[tex]E = \dfrac{\sigma}{\epsilon}\\\\\sigma = E \times \epsilon[/tex]
So, clearly stress is nothing but the force applied per unit cross sectional area. That is,
[tex]\sigma = \dfrac{F}{A}[/tex]
Thus, we can conclude that the tensile stress is the same as force. the applied force per cross-sectional area. Hence, option (D) is correct .
Learn more about the tensile stress here:
https://brainly.com/question/17077464
Which two options describe physical properties of matter?
Answer:
A and E.
Explanation:
Physical properties have to do with things that are not done chemically.
A has to do with light that you can see.
B has to do with Ph (If not A this is your next answer)
C mentions a Patina which is a chemical reaction known as oxidation
D has to do with chemical reactions
E is always correct. One of the fundamental laws about matter is that it must always have mass.
I am 99% confident in A and E as your answer, but if it is wrong go with B and E.
Hope this helps!
A laser beam is incident on two slits with a separation of 0.220 mm, and a screen is placed 4.80 m from the slits. If the bright interference fringes on the screen are separated by 1.60 cm, what is the wavelength of the laser light
Answer:
λ = 7.333 x 10⁻⁷ m = 733.3 nm
Explanation:
We can use the formula of fringe spacing from Young's Double Slit Experiment, to find the wavelength of light:
Δx = λL/d
where,
Δx = fringe spacing = 1.6 cm = 0.016 m
λ = wavelength of laser light = ?
L = Distance between slits and screen = 4.8 m
d = slit separation = 0.22 mm = 0.00022 m
Therefore, using these values in the given equation, we get:
0.016 m = (λ)(4.8 m)/(0.00022 m)
λ = (0.016 m)(0.00022 m)/(4.8 m)
λ = 7.333 x 10⁻⁷ m = 733.3 nm
g calculate the effectiveness radiation dosage in sieverts for a 79 kg person who is exposed 6.8x10^9
Answer:
The answer is "[tex]\bold{dosage = 0.031 rem}[/tex]"
Explanation:
please find the complete question in the attached file.
Given value:
[tex]m = 79\ kg \\\\n = 3.4 \times 10^9 \\\\E = 5.5 \times 10^{-13} \\\\ RBE = 15[/tex]
[tex]\to E = n E\\[/tex]
[tex]= 3.4 \times 10^9 \times 5.5 \times 10^{-13} \\\\ = 1.87 \times 10^{-3}[/tex]
[tex]\to E(absorbed) = 1.87 \times 10^{-3} \times 0.87 = 1.63 \times 10^{-3}[/tex]
calculating the radiation absorbed per kg:
[tex]= \frac{1.63 \times 10^{-3}}{79} \\\\ = 2.06 \times 10^{-5} \\\\ = 0.00206 \ rad[/tex]
[tex]\to Dosage = 0.00206 \times 15 \\[/tex]
[tex]= 0.031 \ \ rem[/tex]
Can you find two ways that carbon can get from the ocean to the lithosphere?
Answer:
Two ways carbon can get from the ocean to the lithosphere is through the marine plants + animals (in the ocean) , sediments, petroleum then to the lithosphere.
Hope that helps!
If you push against the wall the wall will push back what is the name of the force that pushes back?
tension force
Оа
Ob
Ос
normal force
applied force
friction force
Od
Answer:
applied force
Explanation:
I think that's right
who win tug of war with what net force
Answer:
The force on rope is equal for both of them at any time.
For winning the game the force on ground is responsible.
Explanation: