Answer: 249 seconds
Explanation:
Speed of bike = 2.52 m/s
Distance = 628 m
Time taken = ? ( let the unknown value be Z)
Recall that speed is the distance covered per unit time.
Hence, speed = Distance / Time taken
Time taken = Distance / speed
Z = 628m / 2.52 m/s
Z = 249.2 seconds (Round to nearest tenth i.e 249 seconds)
Thus, it takes 249 seconds for the girl to get to her friends house
Wood because it is natural and we use it for furniture but we also burn it for energy.
Answer:
D. 803 lbs
Explanation:
In order to find the compressive stress on all three blocks we first need to find the normal surface area of each:
Surface Area of 1 Block = 3.5 x 3.5
Surface Area of 1 Block = 12.25
Surface Area of all 3 Blocks = A = 3 x 12.25
Area = 36.75
Now, the stress is given by the following formula:
Stress = Force/Area
Stress = 29500 lbs/36.75
Stress = 802.72 lbs
Hence, the correct option will be:
<u>D. 803 lbs</u>
Answer:
6.93m
Explanation:
Using the method of SOH CAH TOA
The base of the tree is 12m which is the adjacent side of the triangle to be generated, the height of the tree will be facing the angle of elevation and it is the opposite side.
Using the formula tan(theta) = Opposite/Adjacent
Given theta = 30°
Adjacent is 12m which is the distance the tree is making with the shadow on the ground
Opposite side will be the height of the tree.
Tan(theta) = height/12
Tan30° = height/12
Height = 12tan30°
Height = 6.93m
Therefore the height of the tree is 6.93m
