A projectile leaves the ground at 150 m/s and reaches a maximum height of 0.57 km. If there was no air resistance, at what angle above the horizontal did it leave the ground?
What will be an ideal response?
45°
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The extended sheet of galaxies that spans 70 Mpc × 200 Mpc and includes about 24,000 galaxies is called the ________
Fill in the blank(s) with correct word
A current in a solenoid coil creates a magnetic field inside that coil. The field strength is directly proportional to:
a. the coil area. b. the current. c. Both A and B are valid choices. d. None of the above choices are valid.
An AC series circuit has 16.5 ? resistance, 12.8 ? inductive reactance and 8.27 ? capacitive reactance. If an effective (rms) emf of 145 V is applied, what is the effective (rms) current value?
a. 7.56 A b. 8.47 A c. 0.495 A d. 23.7 A e. 6.89 A
In a single-slit diffraction experiment, as the width of the slit is made smaller, the width of the central maximum of the diffraction pattern
1.becomes smaller. 2.becomes larger. 3.remains the same.