Answer:
22.27 m
Explanation:
initial velocity, u = 25 m/s
Angle of projection, θ = 45°
height, h = 30 m
Let t be the time taken to reach the ground.
use second equation of motion in vertical direction
t = 1.26 second
The horizontal distance = horizontal velocity x time
d = 25 Cos 45 x 1.26 = 22.27 m
Answer:
y = 0.010 cos ( 1539.4 t + 0.645)
Explanation:
The general equation for a wave on a string is
y = A sin (kx - wt)
Where k is the wave number
k = 2π /λ
k = 2π / 3 10⁻²
k = 209.4 m⁻¹
The angular velocity is related to the frequency
w = 2π f
w = 2π 245
w = 1539.4 rad / s
The maximum amplitude is
.A = 0.0100 m
The wave equation is
y = 0.01 sin (-209.4 x - 1539.4 t)
The particle that is at each point of this wave performs an oscillatory movement perpendicular to the wave discarded by
y = yo cos (wt + fi)
The angular velocity of the particle is equal to the velocity of the wave
w = 1539.4 rad / s
The breadth of displacement is
y₀ = 0.01 m
With the initial data let's look for the phase
0.008 = 0.01 cos (0+ Ф)
Ф = cos⁻¹ (0.008 / 0.01)
Ф = 0.645 rad
Therefore the equation is
y = 0.010 cos ( 1539.4 t + 0.645)
Answer:
Enhanced Green house effect
Explanation:
The paradox describes the inconsistency between the faint young Sun and the temperate climate on the early Earth. Despite low radiation by the sun of the early year, the Earth still maintained a temperate climate.
This paradox can be resolved by instigating changes in the atmospheric concentrations of greenhouse gases like ammonia (NH3), CH4, or CO2. This is referred to as enhanced green house effect.
Answer:
3
Explanation:
Since the evidence found points to the window on investigation remember there was a foot print below the window as well as the window been opened.