Answer:
v₂ = 3.44 m/s
Explanation:
given,
Dan is gliding on skateboard at = 4 m/s
speed of skateboard = 8 m/s
mass of Dan = 50 Kg
mass of skateboard = 7 Kg
Speed of Dan when his feet hit the ground = ?
Using conservation of momentum
PE(initial) = PE(final)
(M+m)V = m v₁ + M v₂
(50+7)x 4 = 7 x 8 + 50 x v₂
50 x v₂ =172
v₂ = 3.44 m/s
speed of Dan when his feet hit the ground = v₂ = 3.44 m/s
Explanation:
Mg-2+C+4>Mg2C.
Here you divide the four by the two and transfer the two toMg. In reactions like this oxidation numbers are exchanged.
0.425
BECAUSE 1000g makes 1Kg
so 425g will make 0.425 option a
The body of a sentence is usually in the middle
I think it’s protein cause i here you need everything else