Buzztutor Questions and Answers by Category

5243

Physics Properties Of Matter Level: Misc Level

Approximately 118 mi wide and 307 mi long and averaging 279 ft in depth, Lake Michigan is the second- largest Great lake by volume. Estimate its volume of water in m3. (Note that 2.54 cm =1 inch and 5280 feet =1 mile)

5242

Physics Measurements Level: Misc Level

A student has a car that gets, on average, 25.0 mi/gal of gasoline. She plans to spend the a year in Europe and take the car with her.

a. What should she expect the car s average gas mileage to be in kilometers per liter?

b. During the year there, she drove 6000 km. Assuming that gas costs $5. 00/gal in Europe, how much did she spend on fuel? ( Compute to the nearest dollar)

5241

Physics Units Level: Misc Level

One student, using unit analysis, says that the equation $v=\sqrt{2ax}$ is dimensionally correct. Another says it isn't With whom do you agree, and why? In the equation, v is velocity, a is acceleration, and x is distance.

5240

Physics Dimensions Level: Misc Level

You are told that the volume of an object of unknown shape is given by $V=\pi d^{\frac{3}{4}}$ , where V is the volume and d is the diameter of the sphere.Is this equation dimensionally correct?

(Use SI unit analysis to find out)

5239

Physics Heat & Thermodynamics Level: Misc Level

Aluminum has a positive coefficient of thermal expansion. Consider a round hole that has been drilled in a large sheet of Aluminum. As the temperature increases and the surrounding metal expands, the hole diameter will:

(a) decrease

(b) increase

(d) remain constant

5238

Physics Heat & Thermodynamics Level: Misc Level

How much heat is added 500 g of water to raise its temperature from 15 %C to 85 % C?

(a) 35 ]

(b) 3.5 x10 4 ]

(d) 1.5 x10 8]

5237

Physics Units Level: Misc Level

Which of the following would correctly convert a Fahrenheit temperature (F) to a Kelvin (K) value?

(a) K= (5/9) (F- 32) + 273

(b) K =(9/5) (F-32) +273

(d) K=(9/5) F+273

(e) K=(5/9) F-273

5235

Physics Measurements Level: Misc Level

Which two temperature changes are equivalent?

(a) 1 degree F=1 degree C

(b) 1 degree C= 1 K

5234

Physics Ray Optics Level: Misc Level

A steel cable spanning a river is 195.946 m long when the temperature is 20 degree C.What will be its length when the temperature drops to 0 degree C? ( The coefficient of thermal

12 x10-6 1-C).

expansion of steel is

(a) 195.997 m

(b) 195.903 m