Answers:
a) -2.54 m/s
b) -2351.25 J
Explanation:
This problem can be solved by the <u>Conservation of Momentum principle</u>, which establishes that the initial momentum must be equal to the final momentum :
(1)
Where:
(2)
(3)
is the mass of the first football player
is the velocity of the first football player (to the south)
is the mass of the second football player
is the velocity of the second football player (to the north)
is the final velocity of both football players
With this in mind, let's begin with the answers:
a) Velocity of the players just after the tackle
Substituting (2) and (3) in (1):
(4)
Isolating :
(5)
(6)
(7) The negative sign indicates the direction of the final velocity, to the south
b) Decrease in kinetic energy of the 110kg player
The change in Kinetic energy is defined as:
(8)
Simplifying:
(9)
(10)
Finally:
(10) Where the minus sign indicates the player's kinetic energy has decreased due to the perfectly inelastic collision
I need answers so sorry guys just givin fake answers noefje
Answer:
If you were to increase the volume the tank would get heavy.
Explanation:
Answer:
The wavelength of the given radiation is 0.327 m
Explanation:
The wavelength and the frequency of a wave are related by the formula, given below:
v = fλ
where.
v = speed of wave
f = frequency of wave = 915 MHz = 915000000 Hz
λ = wavelength of the wave = ?
For the electromagnetic radiations we know that:
v = c = speed of light = 3 x 10^8 m/s
Therefore,
c = fλ
λ = c/f
λ = (300000000 m/s)/(915000000 Hz)
<u>λ = 0.327 m</u>
Answer:
Samarium is a chemical element with the symbol Sm and atomic number 62
Explanation:
Samarsky-Bykhovets, as the Chief of Staff of the Russian Corps of Mining Engineers, had granted access for two German mineralogists, the brothers Gustav Rose and Heinrich Rose, to study the mineral samples from the Urals. In this sense samarium was the first chemical element to be named after a person. Then the minera.