A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2 . At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves?
a. 1.9 km
b. 1.3 km
c. 1.6 km
d. 1.0 km
e. 2.1 km
D
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A bicycle is moving 4.0 m/s. What is the angular speed of a wheel if its radius is 30.cm?
A) 4.8 rad/s B) 7.6 rad/s C) 0.36 rad/s D) 1.2 rad/s E) 13. rad/s
When the current through a resistor is increased by a factor of 4, the power dissipated by it
A) decreases by a factor of 4. B) decreases by a factor of 16. C) increases by a factor of 16. D) increases by a factor of 4. E) remain unchanged.
What is the name of the box in which you edit and format text for a text image?
A. text box B. bounding box C. logo box D. font box
The sound from the whistle of a truck moving at 17.0 m/s toward a cliff reflects from the cliff and is heard by the driver of the truck. When it is parked at the side of the road, the whistle from the truck produces sound of frequency 2.267 kHz
As observed by the driver of the truck, what is the change in frequency the sound from the whistle due to the reflection? The speed of sound is 343 m/s. A) 236 Hz B) 228 Hz C) 207 Hz D) 118 Hz E) 472 Hz