93.5 if it’s wrong sorry sis I need my homework done too
Answer:
The chemist is incorrect because a catalyst increases the rate of reaction only.
Explanation:
A catalyst is a substance in the presence of which the speed of the reaction increases. It plays no role in the chemical change taking place.
Thus, if the two compounds are not chemically reacting, a catalyst wont make it happen either.
A chemical reaction occurs when atoms tend to lose or gain electrons. A catalyst has no role to play in this process.
Speed is distance in a specific time period. When someone ask use the unit "m/s" this period of time is one second. If the skier was able to move 560 m in 25 seconds, in one second how much distance he moves? That is the question.
You can solve this problem like
560m/25s = 22,4 m/s
Good luck!
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
Answer:
ramp b requires less force than ramp a
Explanation:
