Answer:
Explanation:
Given the wave function
y(x,t) = 0.340 sin (15πt − 4πx + π/4)
Generally a wave function is of the form
y(x, t) = A•Sin(wt - kx + θ)
Where
A is amplitude
w is angular frequency
θ is the phase angle
k is the wave number.
Then, comparing this with given wave function
k = 4π, w = 15π and θ = π/4
Speed and direction?
The speed of a wave function can be determined using wave equation
v = fλ
w = 2πf
Then, f = w/2π = 15π/2π = 7.5Hz
Also k = 2π/λ
Then, λ = 2π/k = 2π/4π = 0.5 m
Then,
v = fλ = 7.5 × 0.5
v = 3.75m/s
Direction
Since the time and distance coefficient have opposite sign, for an increasing time interval, the translation will have to increase in the positive direction to nullify the change and maintain the phase. Hence, the wave is traveling in the positive x direction
B. Have neutrons in their nuclei.
C. Have an equal number of electrons and protons
D. Have an equal number of neutrons and protons
Atoms have no electric charge because they have an equal number of electrons and protons.
Explanation:
So from this, we can conclude that atoms have no electric charge because they have an equal number of electrons and protons. Option C is correct.
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B. 0 degrees.
C. 90 degrees.
D. 80 degrees.
Answer:A- Gamma rays
Explanation:
Gamma rays are most dangerous among all the given rays because it has the highest frequency i.e. high penetrating tendency. They can also pass through bones and teeth and this is the reason for their potential hazard.
They can destroy the living cell, initiate gene mutation and can cause cancer.
But they can also be used for destroying cancer cells.
B. Accelerate before entering the curve
C. Applying the brakes only after exiting the curve
D. Apply the accelerator throughout the entire curve
Correct answer choice is:
A) Decelerate before the curve.
Explanation:
Decrease your speed before overtaking a curve. Watch out for road symbols signaling of nearing curves so that you have enough time to reduce down before driving through the curve. It is desirable to drive below the posted speed limit as you progress and drive through curves. Turn as little as probable.
For safety concerning a curve, the correct answer is:
A. Decelerate before the curve.
When approaching a curve while driving, it is essential to slow down or decelerate before entering the curve. This allows you to maintain better control of the vehicle and reduce the risk of losing traction or skidding.
By reducing your speed before entering the curve, you can handle the curve more safely and smoothly, adjusting your steering and maintaining stability throughout the turn. Accelerating into a curve or applying the brakes only after exiting the curve can lead to unsafe driving conditions and increase the likelihood of accidents. It is always safer to slow down before taking a curve to ensure a safer driving experience.
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Answer:
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When energy is transferred to air, the particles of air move faster.
A huge number of submicroscopic particles, including atoms and molecules, are used in the kinetic theory of gases, a theoretical model, to characterize the molecular makeup of the gas.
The idea also states that gas pressure results from particles slamming into one another and the container walls. In addition to defining physical characteristics like temperature, volume, and pressure, kinetic theory of gases also defines transport characteristics like viscosity, thermal conductivity, and mass diffusivity.
It essentially explains every characteristic connected to the tiny phenomenon. The idea is significant because it aids in creating a relationship between macroscopic properties and tiny phenomena.
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