The acceleration of the crate is 1.196 m/s².
<h3>What is acceleration?</h3>
This can be defined as the rate of change of velocity.
To calculate the acceleration of the crate, we use the formula below.
Formula:
- a = (F-mgμ)/m................. Equation 1
Where:
- a = acceleration of the crate
- m = mass of the crate
- F = Force applied to the crate
- μ = Coefficient of friction
From the question,
Given:
- m = 225 kg
- F = 710 N
- g = 9.8 m/s²
- μ = 0.20
Substitute the values above into equation 1
- a = [710-(225×9.8×0.20)]/225
- a = (710-441)/225
- a = 269/225
- a = 1.196 m/s²
Hence, The acceleration of the crate is 1.196 m/s²
Learn more about acceleration here: brainly.com/question/460763
Answer:
Explanation:
a ) y = A sin(B) ; here B is the phase of the wave which moves so that it remains constant
ωt - kx = constant
differentiating on both sides
ωdt - kdx =0
ωdt = kdx
dx / dt = ω / k
wave velocity = ω / k
b ) ω = 14.5 rad / s ,
k = 18 rad / m
wave velocity = ω / k
= 14.5 / 18
= .805 m /s
80.5 cm / s
c )
Amplitude = A
= 9.5 m
The current required by the 60W bulb is three-fifths that required by the 110W bulb
<h3>Electrical Power</h3>
- Electrical power is defined as the amount of electrical work done per second
- Power = electrical work done in joules/time taken in seconds
The formula for calculating power is as follows:
Assuming the voltage across the light bulbs is the same
From the formula, P = IV;
I = P/V
For the 60 W bulb
I₁ = 60/V
For the 100W bulb
I₂ = 100/V
Taking ratios of the currents:
I₁/I₂ = {60/V}/{`100/V}
I₁/I₂ = 3/5
Therefore, the current required by the 60W bulb is three-fifths that required by the 110W bulb
Learn more about electrical power and currents at: brainly.com/question/12822995
Answer:
E = 2,575 eV
Explanation:
For this exercise we will use the Planck equation and the relationship of the speed of light with the frequency and wavelength
E = h f
c = λ f
Where the Planck constant has a value of 6.63 10⁻³⁴ J s
Let's replace
E = h c / λ
Let's calculate for wavelengths
λ = 4.83 10-7 m (blue)
E = 6.63 10⁻³⁴ 3 10⁸ / 4.83 10⁻⁷
E = 4.12 10-19 J
The transformation from J to eV is 1 eV = 1.6 10⁻¹⁹ J
E = 4.12 10⁻¹⁹ J (1 eV / 1.6 10⁻¹⁹ J)
E = 2,575 eV
