Answer:
Molybdenum and seaborgium
Answer:
Explanation:
1 ) Force F = dp/ dt , p is momentum
= d/dt (mv)
= v dm/dt
Given dm/dt = 0.1 kg per second.
Force = v x 0.1
= .1 x .1
= .01 N
2 ) work done = force x displacement
Displacement in 1 s = 0. 1 m ( v = .1 m /s )
Work done in one second = .1 X .1
= .01 J
3 ) Velocity is constant so change in kinetic energy is due to additional mass .
Mass deposited in one second
= .1 g
Velocity = .1 m/s
Change in kinetic energy = 1/2 x .1 x .1 ²
= 5 x 10⁻⁴J
4 ) No , they are not the same. It is so because force has to do work against the frictional force offered by the surface on which sand is falling . So rise in kinetic energy is small as compared with work done by the force.
The answer is Electric
Hope it helps
Answer:
Let's define t = 0 as the moment when the ball hits the wall.
in this moment, we have a given acceleration, but if we only want to calculate the average acceleration, then let's consider the acceleration constant.
a(t) = A.
To find the velocity equation we should integrate, and the constant of integration will be the initial velocity, in this case, is 14.3m/s.
v(t) = A*t + 14.3m/s
Now we know that at t = 0.011s, the velocity is -13.5m/s (the sign is negative because the ball is moving in the opposite direction as before).
Then we can solve the equation:
v(0.011s) = -13.5m/s = A*0.011s + 14.3m/s
Now we can solve it for A, the average acceleration:
-13.5m/s - 14.3m/s = A*0.011s
(-27.8m/s)/0.011s = A = -1313.5 m/s^2
C. Abraham Maslow, wrote a paper about these needs in 1943 called, "A Theory of Human Motivation.