Process of Science: Devise an experiment that would produce evidence (not necessarily proof) that Earth is round. You may use any technology you like, but you may not leave Earth (i.e., no satellite photos and no space travel)
Be as creative as you like there are many right answers.
Some answers are: circumnavigate the globe; call a friend in Japan during the day here and find out that it's night there; watch the sails of ships sailing off into the distance; observe Polaris from the North Pole and watch its position change as you move towards the equator, etc.
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Energy and Momentum: In a police rifle test, a 15-g bullet traveling 213 m/s in a vertical direction suddenly buries itself in a 2.4-kg block of wood at rest directly above it. As a result, the bullet-block combination moves vertically upward.(a) Determine the velocity of the bullet-block combination just after the impact.(b) Determine the maximum height reached by the bullet/block combination.(c) Is kinetic energy conserved in this collision?
What will be an ideal response?
How can the Doppler method be used to measure the eccentricity of a planet's orbit?
A) by measuring the speed at which the star orbits the mutual center-of-mass of the star and planet, and using Newton's theory of gravity B) by measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak, and using Newton's version of Kepler's Third law C) by measuring the asymmetries in the velocity curve D) by measuring the amount by which the starlight is reduced when the planet transits
A child is drinking a liquid with a straw. Which of the following statements is true?
A. Longer straws work better because the pressure is larger deeper down B. The fluid is being pulled up into the straw C. The pressure inside the straw depends on the viscosity of the liquid D. The pressure in the straw is reduced and the liquid is pushed upward by atmospheric pressure on the surface of the liquid
A car needs to generate in order to maintain a constant velocity of on a flat road. What is the magnitude of the total resistive force acting on the car (due to friction, air resistance, etc.)? (1 hp = 746 W)
A) 2.05 × 103 N B) 2.75 N C) 1.03 × 103 N D) 2.87 × 103 N