Answer:
Explanation:A driver slowing down to stop at a light is accelerating. ... acceleration is opposite to the motion, the speed of the object decreases. The car slows down. Slowing down is also called negative acceleration.
Answer:
(A) V = 9.89m/s
(B) U = -2.50m/s
(C) ΔK.E = –377047J
(D) ΔK.E = –257750J
Explanation:
The full solution can be found in the attachment below. The east has been chosen as the direction for positivity.
This problem involves the principle of momentum conservation. This principle states that the total momentum before collision is equal to the total momentum after collision. This problem is an inelastic kind of collision for which the momentum is conserved but the kinetic energy is not. The kinetic energy after collision is always lesser than that before collision. The balance is converted into heat by friction, and also sound energy.
See attachment below for full solution.
Answer:
4.26*10^37kg
2.14*10^7 solar mass
Explanation:
To solve this question, let us assume that the ring shaped accretion disk around the galaxy center's black hole is circular. This would permit us to use the circular orbit equation.
To find the mass of the disk, we use the formula
V = √(Gm/r)
2*10^5 = √[6.67*10^-11 * m / (7.5 * 9.461*10^15)]
(2*10^5)² = 6.67*10^-11 * m / 7.096*10^16
4*10^10 * 7.096*10^16 = 6.67*10^-11 * m
m = 2.838*10^27/6.67*10^-11
m = 4.26*10^37kg
To get the mass in solar mass, we divide by mass of the sun(as instructed)
m = 4.26*10^37/1.99*10^30
m = 2.14 * 10^7 solar mass
Answer:
it can contaminate the water
Explanation:
I hope this helps ;)