Answer:
Explanation:
A vector is any substance that has both magnitude and direction. lndeed a vector quantity has both magnitude and direction. Example of a vector quantity is velocity. Determining the velocity of an object allows one to determine how fast and in what direction the object moves. Velocity also affords the opportunity to compare the motion of more than one vectors.
D
hydrosphere-- anything to do with water
geosphere -- the rocks and soil
topsoil (geosphere) is eroded by rainwater(hydrosphere)
Answer:
B. 81
Explanation:
When you multiply two numbers, round the answer to the least number of significant figures available. 67.6 has three significant figures, and 1.2 has two significant figures. So we round to two significant figures.
Given: Energy E = 5.53 X 10⁻¹⁷ J; Velocity of light c = 2.998 x 10⁸ m/s
Planck's constant h = 6.63 x 10⁻³⁴ J.s
Required: Frequency f = ?
Formula: E = hc/λ and Frequency f = V/λ
λ = (6.63 x 10⁻³⁴ J.s)(2.998 X 10⁸ m/s)/(5.53 x 10⁻¹⁷ J)
λ = 3.59 X 10⁻⁹ m
For Frequency f = ?
f = c/λ
f = 2.998 x 10⁸ m/s/3.59 x 10⁻⁹m
f = 8.35 x 10¹⁶ Hz
Answer:
0 (there is no speed)
Explanation:
If an object is at rest, it is not moving, and it doesn't have a speed, so the speed is zero.