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A banked circular highway curve is designed for traffic moving at 79 km/h. The radius of the curve is 155 m. Traffic is moving along the highway at 52 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?
A jeweler working awith a heated 47 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 99 C, what mass of water at 25 C is needed to lower the rings temperature to 38 c.
A thin 12 cm long solenoid has a total of 490 turns of wire and carries a current of 1.9 A. find the magnitude of the field inside near the center.
Describe the full annealing heat treatment for a plain carbon steel.
A toy cannon uses a spring to project a 5.24 g soft rubber ball. The spring is originally compressed by 4.96 cm and has a force steady of 8.03 N/m.
A dolphin located in seawater at a temperature of 25 °C emits a sound directed toward the bottom of the ocean 200m below. How much time passes before it hears an echo.
What is magnitude of the unknown force
What is resultant force
A second fragment, who's mass is 3.4 kg, moves away from the point of explosion with a speed of 418 m/s along the negative x axis. What is the speed of the third fragment? Ignore effects due to gravity.
The centers of a 11kg lead ball and a 100g lead ball are separated by 9 cm. what is the ratio of this gravitational force to the weight of the 100 g ball.
A particular organ pipe can resonate at 231 Hz, 385 Hz, and 539 Hz, but not at any other frequencies in between. Is it an open or a closed pipe? What is the fundamental frequency of this pipe.
Two narrow slits separated by 0.51 mm are illuminated by monochromatic light of wavelength 670 nm. How many bright fringes can be seen on a screen 1.3 cm wide placed 1.1 m in front of the slits.
A sailboat leaves a harbor and sails 1.80 km in the direction 65 degrees sounth of east, the boath then sails 1.1 km in the direction 15 degrees north of east. the trip takes 15 minutes. what is the magnitude and direction.
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