Two events occur 5.0 s apart in time and 3.0 s apart in space. A clock traveling at a speed of 0.60 can be present at both these events. What time interval will such a clock measure between the events?
A. 8.0 s
B. 5.8 s
C. 5.0 s
D. 4.0 s
E. 2.0 s
F. Other (specify)
D. 4.0 s
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A galvanometer with a resistance of 40.0 ? deflects full scale at a current of 2.0 mA. What resistance should be used with this galvanometer in order to construct a voltmeter that can read a maximum of 50 V?
A) 25 k? B) 27 k? C) 29 k? D) 31 k? E) 35 k?
A 44-g block of ice at -15°C is dropped into a calorimeter (of negligible heat capacity) containing 100 g of water at 5°C
When equilibrium is reached, how much of the ice will have melted? The specific heat of ice is 2090 J/(kg K) and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 2.1 g B) 21 g C) 5.2 g D) 52 g E) 4.4 g
Which one of the following scientists first built and operated devices that could emit and detect human-made electromagnetic radiation?
a. Hertz b. Ampere c. Maxwell d. Lenz
Meteor add approximately what mass to the Earth each year?
A) a few tons B) millions of tons C) thousands of tons D) tens of thousands of tons