An 85.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 28.0°
1 answer:
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Answer:
The correct answer is option 'c': 30 AUs
Explanation:
For a spherical wave front emitted by sun with total energy 'E' the energy density over the surface when it is at a distance 'r' from the sun is given by
This energy per unit area is sensed by observer as intensity of the sun.
Let the initial intensity of sun at a distance be
Thus if the sun becomes 900 times dimmer we have
Thus the distance increases 30 times.
0.3 m/s is the speed of a wave with a wavelength of 3 m and a frequency of 0.1 HZ.
<u>Explanation:</u>
Speed of wave is related to both wavelength and frequency of waves. The wavelength is the displacement between the respective points of two adjacent waves. Wave frequency is the waves number that travels through a fixed points at given time. Hence, the equation that shows how three factors are related as below,
This comparison measures the wavelength in meters and frequency in hertz (Hz) or the number of waves per second. Hence, the wave speed expressed in meters per second (the S.I unit of speed).
Here, given wavelength = 3 m and frequency = 0.1 Hz. So, the wave speed is calculates as
Answer:
25600 cm
2.56 x 10⁴ cm
Explanation:
Step 1: Find conversion
There are 100 cm in 1 m.
Step 2: Set up dimensional analysis
Step 3: Multiply and cancel out units
25600 cm
2.56 x 10⁴ cm