Answer:
A vector ⇒ answer D
Step-by-step explanation:
* Lets revise some definition to solve the problem
- <em>Speed = distance ÷ time</em>
∵ Distance has no direction
∴ Speed has no direction
∴ Speed is a scalar quantity ⇒ (magnitude only)
- <em>Velocity = displacement ÷ time</em>
∵ Displacement has direction
∴ Velocity has direction
∴ Velocity has magnitude and direction
∵ Any vector has magnitude and direction
∴ Velocity is a vector quantity
∵ Velocity describes both speed (magnitude) and direction
∴ Velocity is a vector
Answer: magnitude of an earthquake with an energy release of 7.079 X 10^26 =8
Step-by-step explanation:
Given that the magnitude M of an earthquake can be expressed by the equation
M=(2/3)log E - 9.9
Given that Energy release , E=7.079 X 10^26
Magnotude , M=(2/3)log E - 9.9
=2/3 log7.079 X 10^26 -9.9
2/3 x 2.8499719 -9.9
17.8999813 -9.9
=7.9999
rounded to 8 magnitude
The two factors to make 4800 is 60 and 80. I hope this helped! :)
Answer:
3. d = 15 ; c° = 90°
4. s = 12 ; t° = 71°
Step-by-step explanation:
Figures are similar.
Therefore:
3. In the rectangles one is 3 times bigger than the other. each side is multiplied by 3.
We can find d : 5*3 = 15
Also, the angles are equal 90° angles.
4. The other shape is similar but it is up side down.
one is 6 times bigger than the other. We can fins by multibliying the same side of the small shape by 6 : 2*6 = 12
The angle t° is the same angle oposite to the 90° angle but in the right position. Remember the Shape is up side down,
Therefore: t° = 71°