Phy 250 - Study guides, Class notes & Summaries

Straighterline PHY 250 Exam Questions and Answers - Latest 2023/2024 (GRADED) Would an object precess faster if it had more angular momentum? Select one: a. Yes, because the change in angular momentum depends on its magnitude b. Yes, because the energy of the system has increased c. No, because precession only depends on the amount of applied gravitational force d. No, because the angular velocity of precession is inversely proportional to the magnitude of the gyroscope’s angular momentu...

PHY 250 General Physics I All Graded Exams 2023/2024 100%Verified and Updated by Expert. Question 1 Correct 6.00 points out of 6.00 What is the acceleration of a skydiver at terminal velocity whose mass is 80 kg and cross-sectional area is 14 m2 . The density of the air he is falling through is 0.9984 g / m 3 . The drag coe_cient has a value of 0.485. Select one: a. 15.2 m / sec2 b. 56.4 m / sec2 c. 0 m / sec2 d. 481 m / sec2 e. None of the above Question 2 Incorrect 0.00 point...

A simple pendulum on Earth has a period of 8.0 s. Which of the following is the approximate period of this pendulum on an asteroid where the acceleration due to gravity is roughly 1/16 that of Earth? Select one: a. 0.5 s b. 2.0 s c. 32 s d. 64 s Two waves are traveling on a single string. The wave functions for the two waves are and . At what x-values do the wave always cancel? Select one: a. x = 0 b. x = 1.7 c. x = 2.5 d. x = 5.0 If A is the amplitude of a mass on an oscillati...

The pilot of a spacecraft moving horizontally at 10 m / s notices that the hailstones going past the port window makes an angle of 45° with the downward vertical. What is the speed of the hailstones with respect to the ground, assuming that there is no wind? Select one: a. 10 m / s b. 14 m / s c. 20 m / s d. 21 m / s The correct answer is: 10 m / s Grade 0.00 out of 150.00 (0%) Feedback Unfortunately you didn’t get over a 70% on your first examination (70% is...

PHY 250 Exam Questions and Answers | Latest 2023/2024 | StraighterLine (GRADED). Which of the following statements concerning an object in free fall through the atmosphere is incorrect? Select one: a. Air resistance opposes the motion of an object moving through air and exists because a moving object collides with air molecules. b. The speed of a falling object increases due to the frictional force of air drag. c. Given two spherical objects made of the same material and dropped from the sam...

PHY 250 Exam Questions and Answers - Latest Update 2023-2024 | Straighterline. Why are gyroscopes useful? Select one: a. They do not flip over so you always know which way is up. b. They always precess in the same direction. c. They respond differently depending on their position on the Earth. d. They respond differently at different altitudes. The correct answer is: They do not flip over so you always know which way is up. The work done to accelerate a car from 0 m / s to 40 m / ...

PHY 250 General Physics Exam Questions and Answers Latest 2023- 2024 | Graded A+. John Wilkins hits a baseball with an initial velocity of 110 mph at an angle of 35° from the horizontal. The backfield fence is 403 ft from home plate. Did “The Big J” hit a home run? (Assume there is no drag force and that there is no wind.) Select one: a. yes b. no Feedback The correct answer is: yes Question 2 Incorrect 0.00 points out of 6.00 Flag question Question text The normal force exerte...

Two inertial observers are moving with relative speed v. An observer, O, measures the speed of an object in her reference frame to be u and notes O’s speed to be v. What is the speed of the object in the prime inertial frame according to O? Select one: a. b. c. d. If the radius of a pipe carrying water is doubled, the volume flow rate of the water____________. Select one: a. remains the same b. is quartered c. is halved d. is quadrupled Bernoulli’s equation does not include the ...

Straighterline PHY 250 General Physics Exam Questions and Answers Latest 2023/2024 | Graded. Anne is riding on a Ferris wheel. From t = 10 s to t = 70 s, the angular position of the wheel is described by the function: During this time interval, Anne is at the very top of the Ferris wheel at most how many times? Select one: a. 4 b. 6 c. 13 d. 30 Feedback The correct answer is: 4 Question 2 Correct 6.00 points out of 6.00 Flag question Question text Select one: a. 42 N⋅m2 b. 84 ...

What is the acceleration of a skydiver at terminal velocity whose mass is 80 kg and cross-sectional area is 14 m2. The density of the air he is falling through is 0.9984 g / m3. The drag coe_cient has a value of 0.485. Select one: a. 15.2 m / sec2 b. 56.4 m / sec2 c. 0 m / sec2 d. 481 m / sec2 e. None of the above The correct answer is: 0 m /sec2 Calculate x = vt + 1 at2 , where v = 0.227 m/s, t = 11.1s, and a = 9.80 m/s2 .a. 606.2487 m b. 606 m c. 605.5 m d. 606.249 m The correct ...