Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 0, Problem 12P
To determine
The speed in units of mi/h
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You are driving home from school steadily
at 97 km/hkm/h for 160 kmkm. It then
begins to rain and you slow to
61 km/hkm/h instantly. You arrive home
after driving 4.5 hours.
How far is your hometown from school?
answer using two significant figures.
A pilot flew a jet from Montreal to Los Angeles, a distance of 2500 mi. On the return trip, the average speed was 20% faster than the outbound speed. The round-trip took 9 h 10 min. What was the speed from Montreal to Los Angeles?
On an Interstate highway in a rural region of wyoming, a car travelling at a speed of 38.0 m/s. Is this car exceeding the limit of 75.0 mi/h?
Chapter 0 Solutions
Physics Fundamentals
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- In 2015, a Japanese high-speed train set a record— traveling at 374 mph during a test run near Mt. Fuji. What is the speed in kilometers per hour (1 mi = 1609 m)? Report your answer as a whole number.arrow_forwardSome vehicles along super highways in the Philippines run at almost break-neck speed of 80 km/h. What is the speed in miles per hour (mi/h)? Conversion factor: 1.609 km = 1 milearrow_forwardProblem 2: A car is traveling at a speed of 33 m/s. Part (a) What is its speed in kilometers per hour? Numeric : A numeric value is expected and not an expression. Skm/h = %D Part (b) Suppose the speed limit is 79 km/h. How many kilometers per hour would the car need to slow down to be going the speed limit? Numeric : A numeric value is expected and not an expression. As =arrow_forward
- An object is dropped from rest and takes 2.94 seconds to reach the ground below. From what distance above the ground was it dropped? State this as a positive number and assume it has proper SI Units.arrow_forwardTo visit your friend, you first drive on a highway at 55 mi/h for 1.6 hours and then drive on a local road at 20 mi/h for 0.7 hours. What is the average velocity of your trip in mi/h to your friend's home? Your Answer: Answerarrow_forwardOn an interstate highway in a rural region of Wyoming, a car is traveling at a speed of 38.0 m/s. Is the driver exceeding the speed limit of 75.0 mi/h?arrow_forward
- a person walks for 1.00 hr at a speed of 2.00 mi/hr. he stops for 1.00 hr. he then starts walking again and covers 2.00 mi at a speed of 1 mi/hr. find the average speed of the trip answer with Correct number of significant digitsarrow_forwardOn an interstate highway in a rural region of Wyoming, a car is travelling at a speed of 38.0 m/s. is this car exceeding the speed limit of 75.0 mi/h?arrow_forwardAverages follow the same rule. Suppose a car travels around a track three times. Your measurements for the three trials are 45.0 km/h, 48.21 km/h, and 47.024 km/h. Determine the average speed of the car. 45.0 + 48.21 + 47.024 = 140.234 140.234 + 3 = 46.744 66 Because the least precise measurement is 45.0 km/h, the answer can be precise only to the nearest one-tenth. Thus the correct answer, rounded off, is 46.7 km/h. Answer the following questions. 15. An experiment calls for 16.156 g of substance A, 28.2 g of substance B, 0.0058 g of substance C, and 9.44 g of substance D. a. How many significant digits are there in each measurement? A. b. What is the total mass of substances in this experiment? В. C. D. c. How many significant digits are there in the answer to part b? 16. Your lab partner has measured 16.50 ml of water. You accidentally tip over the graduated cylinder and spill some of the water. You stand the cylinder up and determine that there are 8.0 ml. of water left. a. Which…arrow_forward
- To get to his office from home, Greg walks 5 blocks north and then 2 blocks east. After work he meets some friends at a cafe; to get there he walks 3 blocks south and 6 blocks west. All blocks are 660 feet long. What is the straight-line distance from the cafe to his home? Express your answer in feet.arrow_forwardAn automobile traveling 95 km/hkm/h overtakes a 1.40 kmkm -long train traveling in the same direction on a track parallel to the road. A) If the train's speed is 75 km/hkm/h, how long does it take the car to pass it in minutes? Express your answer to two significant figures and include the appropriate units. B) How far will the car have traveled in this time? Express your answer to two significant figures and include the appropriate units. C) How long does it take the car to pass the train if the car and train are traveling in opposite directions in minutes? Express your answer to two significant figures and include the appropriate units. D) How far will the car have traveled in this time? Express your answer to two significant figures and include the appropriate units.arrow_forwardYou are driving home from school steadily at 97 km/hkm/h for 160 kmkm . It then begins to rain and you slow to 61 km/hkm/h instantly. You arrive home after driving 4.5 hours. How far is your hometown from school? answer using two significant figures. What was your average speed? answer using two significant figures.arrow_forward
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