For a given steel, there is a crack of length a in the steel, and the yield strength of the steel is increased by heat treatment. The fracture strength of this steel is _________.
Fill in the blank(s) with the appropriate word(s).
decreased
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Magnetic Field of a Current Loop: A wire carrying a current is shaped in the form of a circular loop of radius 4.0 mm. If the magnetic field strength at its center is 1.1 mT with no external magnetic fields present, what is the magnitude of the current flowing through the wire? (?0 = 4? × 10-7 T ? m/A)
A. 7.0 A B. 28 A C. 14 A D. 17 A
A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, giving the car a deceleration of 3.50 m/s2. How far does the car travel after the driver put on the brakes before it comes to a stop?
A) 4.57 m B) 9.14 m C) 112 m D) 146 m E) 292 m
A constant volume and mass of helium gas at 77°C is heated so that the pressure of the gas doubles. What is the new temperature of the gas in Celsius degrees?
a. 154°C b. 273°C c. 427°C d. 700°C
What size capacitor should be placed in series with a 30-? resistor and a 40-mH inductive coil if the resonant frequency of the circuit is to be 1.0 kHz?
A) 3.3 µF B) 0.63 µF C) 6.0 µF D) 4.5 µF E) 2.0 µF