It can't be pinned down to a single year because scientific work takes place over many years of research and discovery.
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</h2><h3>kinetic energy is given as</h3>
KE = (0.5) m v²
given that : v = speed of the bottle in each case = 4 m/s when m = 0.125 kg
KE = (0.5) m v² = (0.5) (0.125) (4)² = 1 J
when m = 0.250 kg KE = (0.5) m v² = (0.5) (0.250) (4)² = 2 J
when m = 0.375 kg KE = (0.5) m v² = (0.5) (0.375) (4)² = 3 J
when m = 0.0.500 kg KE = (0.5) m v² = (0.5) (0.500) (4)² = 4 J
Answer:
V=28.5m/s
b=V=28.5m/s
c=V=28.5m/s
Explanation:
A slingshot fires a pebble from the top of a building at a speed of 15.0 m/s. The building is 30.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the pebble is fired.
(a) horizontally,
(b) vertically straight up,
(c) vertically straight down.
u=15m/s
yi=30m
v=?
yf=0
system=pebble+earth
workdone=0
chnage in energy=0
ki+Ui=Kf+Ui
K=kinetic energy
U=potential energy
1/2mv^2+mgyf=1/2mu^2+mgyi
V^2=u^2+2gyi
V=
V=28.5m/s
b. and c will be the same as a. because the magnitude of the kinetic energy is dependent on the velocity and not the magnitude which the pebble is tilted at
(a)The window panes are transparent
(b)The colors of the panes are due to the wavelengths of light that the glass allows to pass through.
<h3>What are trasparent glasses?</h3>
The glasses which allows the light rays to pass through them are called as the transparent glasses.
or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that is perceived by the human eye.[1] Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm),
corresponding to frequencies of 750-420 terahertz, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths
Hence the window panes are transparent the colors of the panes are due to the wavelengths of light that the glass allows to pass through.
To know more about trasparent glasses follow
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