The fast server in women's tennis is Venus Williams, who recorded a serve of 130 mi/h (209 km/h) in 2007 If her racket pushed on the ball for a distance of 0.11 m, what was the average acceleration of the ball during her serve?

A particular car has a weight of 9500 N. What is the mass of the car? 9500 kg 95000 kg 950 kg 2160 kg

The magnitude of a force is 36units if 1kg, 1m and 1s are taken as fundamental units. Find the value of this force in cgs system

Which of the following is a complex machine? 1) piano 2) bottle opener 3) shoehorn 4) doorknob

What is the equation for Spring force and what do the variables represent

Human activies that impact water cycle include a. Use of toxic chemicals in agriculture and manufacturing run-off b. A decreased use of water by animals c. An increase of sedimentation of rivers d. A decrease in the erosion of creek beds

Design an experiment (Fair Test) to find out what would be a good insulator for a dog house.

Which of these changes does a submarine encounter as it returns from the bottom of the ocean to the surface of the ocean? a. the amount of sunlight increases. b. the water temperature decreases. c. the amount of plants decreases. d.

Why do some elements have symbols that don't use letters in the element's name?

How many (whole number of) 91 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton? A metric ton is 1.000 * 103 kg. Answer in units of people.

What are the two types of surface waves? How are they different and which one would cause more damage? Explain.