A0.900 kg block is attached to a spring with spring constant 14.5 n/m . while the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 34.0 cm/s . what are you may want to review (pages 400 - 401) . part apart complete the amplitude of the subsequent oscillations? express your answer with the appropriate units. 8.47 cm previous answers correct here we learn how to calculate the amplitude of the spring's oscillations. part b the block's speed at the point where x= 0.150 a? express your answer with the appropriate units.

What sort of waves exhibit the doppler effect?

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.

An atom that has gained or lost electrons is called an _