Answer:
v = -0.45 m/s
Explanation:
Assuming the canoe was initially at rest with momentum L = 0
and that the dog's velocity is in the positive direction
conservation of momentum
0 = 15(1.2) + 40v
v = -0.45 m/s
The Answer is D) equal hydrogen and hydroxide-ion concentration
Answer:
Explanation:
Heat capacity A = 3 x heat capacity of B
initial temperature of A = 2 x initial temperature of B
TA = 2 TB
Let T be the final temperature of the system
Heat lost by A is equal to the heat gained by B
mass of A x specific heat of A x (TA - T) = mass of B x specific heat of B x ( T - TB)
heat capacity of A x ( TA - T) = heat capacity of B x ( T - TB)
3 x heat capacity of B x ( TA - T) = heat capacity of B x ( T - TB)
3 TA - 3 T = T - TB
6 TB + TB = 4 T
T = 1.75 TB
Answer:
kinetic
Explanation:
kinetic energy is powered by motion or gravity the steeper the hill is the faster a ball will roll
Answer:
The gravitational force between them quadruples
Explanation:
According to law of gravitation, the force of attraction (F) between two masses m1 and m2 is directly proportional to the product of the masses and inversely proportional to the square of the distance(r) between them. Mathematically,
F1 = Gm1m2/r²... 1
If their masses doubles, the formula becomes;
F2 = G(2m1)(2m2)/r²
F2 = 4Gm1m2/r² ... 2
Dividing equation 2 by 1, we have;
F2/F1 = {4Gm1m2/r²}÷{Gm1m2/r²}
F2/F1 = 4Gm1m2/r²×r²/Gm1m2
F2/F1 = 4
F2 = 4F1
The gravitational force between the masses when they doubles quadruples.
