Answer:
2.9 m/s
Explanation:
Momentum will be conserved
Speed of the ball just before collision is
v = √2gh = √(2(9.8)(0.8)) = 3.96 m/s
The initial momentum is 1.3(3.96) = 5.15 kg•m/s
The block takes away momentum of 0.6(2.2) = 1.32 kg•m/s
Leaving the ball with momentum of 5.15 - 1.32 = 3.83 kg•m/s
vf(ball) = 3.83 / 1.3 = 2.946... ≈ 2.9 m/s
student is removing rocks from a garden. She exerts a force of 218 N on a lever to raise one rock a distance of 11.0 cm.
Answer:
52.98 cm
Explanation:
The ratio of forces and distance moved will be the same hence we apply cross multiplication rule
If 218 N can only raise the rock to a distance of 11 cm then we check the distance it can move when force is increased to 1050 N
218 N=11 cm
1050 N=?
By cross multiplication, the distance will be equivalent to 
Answer:
150 fils
Explanation:
Power = 125 Watt
Time 4 hours a day
Energy per day = Power x time per day = 125 x 4 = 500 watt hour
Energy for 30 days = 500 x 30 watt hour = 15000 watt hour = 15 KWH
Cost of 1 KWH = 10 fils
Cost of 15 KWH = 15 x 10 = 150 fils
The type of precipitation that would likely be falling from cumulus
clouds with a ground air temperature of 14 degree Celsius is rain. The
correct answer between all the choices given is the third choice or letter C. I
am hoping that this answer has satisfied your query and it will be able to help
you in your endeavor, and if you would like, feel free to ask another question.
Power is joules per second or J/s when work is measured in joules and time in seconds. The basic unit of power, 1 J/s is called a watt (W), named after James Watt who made important improvements to the steam engine. By definition, a watt is the consumption of one joule of energy per second.
