A car initially traveling at 60 km/h accelerates at a constant rate of 2.0 m/s2. How much time is required for the car to reach a speed of 90 km/h?
A) 30 s
B) 15 s
C) 45 s
D) 4.2 s
D
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A charge q1 is placed on the y-axis at y = 4.0 m and the resulting potential at the position (3.0 m, 4.0 m) is 3.0 V. The charge q1 is removed and a charge q2 is placed on the x-axis at x = 3.0 m and the resulting potential at the position (3.0 m, 4.0 m) is 4.0 V. If both charges are in place simultaneously, what is the potential at (3.0 m, 4.0 m)?
A. 1.0 V B. 3.5 V C. 5.0 V D. 7.0 V E. 12 V
Intrusive definition
What will be an ideal response?
In a series circuit containing a resistor and an inductor connected to an ideal dc source and a switch, the inductor gets 40% of its maximum current 1.8 s after the switch is closed. What is the time constant of this circuit?
A) 2.5 s B) 0.80 s C) 5.5 s D) 3.5 s E) 1.5 s
In a star, the condition of balance between the inward force of gravity and the outward force of thermal and radiation pressure is known as _______________ equilibrium
a. hydrostatic b. thermal c. photostatic d. magnetostatic