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1. Suppose an airplane flew east along the equator from the Prime Meridian to the International Dateline; that is, exactly half way around the world. What is its final displacement? Is it the distance covered by its route of flight (12,450 miles) or the distance measured straight through the center of the earth (7,920 miles)? Suppose the trip took exactly one day. What would be the displacement as observed from the Sun?
2. Suppose the airplane flew at a steady 450 miles per hour, with respect to the surface of the Earth. Discuss, in qualitative (non-mathematical) terms, what its velocity would be with respect to other frames of reference: the center of the Earth, the Moon, the Sun, and the center of the Galaxy.
3. Comment on how the various safety features in new cars work to minimize injury. (Don't limit your discussion to seat belts.) Beginning with the notion that injuries are caused by forces (duh!), discuss the origins of forces in terms of velocity, distance, time, and acceleration. Shamelessly flaunt your detailed knowledge of the material covered in Modules 1 and 2 by using equations and numerical examples as appropriate.
Cost of electricity varies but typical values are around $0.15/kWh. Using this price, calculate the cost of making a piece of toast in 3.00 min with a 980W toaster
Calculate and compare the electron densities of a piece of aluminum 1 cm thick and a piece of iron of the same density thickness. Show your work.
The small spherical planet called "Glob" has a mass of 6.06×1018 kg and a radius of 5.84×104 m. What was the initial speed of the rock as it left the astronaut's hand? (Glob has no atmosphere, so no energy is lost to air friction
A particle known as a pion lives for a short time before breaking apart into other particles. what is the lifetime according to a hypothetical person who is riding along with the pion
A planet requires 300 Earth days to complete its circular orbit around its sun, which has a mass of 6.0 x 1030 kg. What are the planet’s (a) orbital radius and (b) orbital speed?
A cylinder with a piston contains 0.300 moles of oxygen at 2.20×10^5 pa and 340 K . The oxygen may be treated as an ideal gas. Find the internal-energy change during the final cooling
Imagine removing one electron from every atom in a tiny cube of gold 1 mm on a side. (Never mind how you would hold the resulting positively charged cube together.) Do the same thing with another such cube a meter away.
To fill a child's inflatable wading pool, you use a garden hose with a diameter of 2.90 cm. Water flows from this hose with a speed of 1.50 m/s. How long will it take to fill the pool to a depth of 25.0 cm if the pool is circular and has the diame..
A vehicle attempting to aerbrake into orbit around Mars needs to achieve an equivalent deltaV(retro) of 2 km/s. what is the average drag force (in g's) we must attain
A properly motivated kangaroo can jump over an object. what is the velocity of the kangaroo, just when it returns to the ground
The left ventricle of the heart accelerates blood from rest to avelocity of +21cm/s. If the displacement of the blood during the acceleration is +1.5 cm, determine its acceleration (incm/s2).
A box of weight w = 2 N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal, What is the work done on the box by the force of kinetic friction
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