Question

Window Help Bookmarks Tools Doctor of Phys Quiz: Final Exam Open Curriculum-RX X X X Home Search Textboo X ttps://su.instructure.com/courses/10088/qui Search pedia News Popular Academic Transcript Getting Started Academic Transcript 5 pts) Find pH of a s... D Question 3 10 pts In a small dam, water flows at a rate of 2500 kg/s and falls 30 m. After calculating the power wasted by the waterfall, how many 75 W lightbulbs can be lit by this power? 9800 bulbs O 2940 bulbs O 75000 bulbs O 7350 bulbs Question 4 10 pts A4 kg obiect is released from rest from a height of 1.2 m above a vertical spring (initially in its natural state). The object strikes the top end of the spring compressing it at distance of 0.6 m. Find the spring's force constant WPXOR

Answer 1

here.

3)

the rate at which the water falls , R = 2500 kg/s

height , h = 30 m

power of each bulb , P = 75 W

let the numer of bulbs be N

equating the powers

R * g * h = N * P

2500 * 9.8 * 30 = N * 75

solving for N

N = 9800 Bulbs

the number of bulbs are 9800 Bulbs