Steve walks from his house 5 km South then turns east and walks 2 km. Then he walks 9 km North to his older sister's house. She
1 answer:
Given :
Steve walks from his house 5 km South then turns east and walks 2 km. Then he walks 9 km North to his older sister's house. She gives him a ride to his friend Fred's house 2 km West.
To Find :
The total distance covered by Steve .
Solution :
We know , distance is the actual measurement space between two points .
Now , total distance travelled by Steve is the sum of all distance travelled .
So , total distance covered by Steve is 18 km .
Hence , this is the required solution .
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Answer:
(a) the electrical power generated for still summer day is 1013.032 W
(b)the electrical power generated for a breezy winter day is 1270.763 W
Explanation:
Given;
Area of panel = 2 m × 4 m, = 8m²
solar flux GS = 700 W/m²
absorptivity of the panel, αS = 0.83
efficiency of conversion, η = P/αSGSA = 0.553 − 0.001 K⁻¹ Tp
panel emissivity , ε = 0.90
Apply energy balance equation to determine he electrical power generated;
transferred energy + generated energy = 0
(radiation + convection) + generated energy = 0
(a) the electrical power generated for still summer day
(b)the electrical power generated for a breezy winter day
Answer:
Fr = 48 [N] forward.
Explanation:
Suppose the movement is on the X axis, in this way we have the force of the engine that produces the movement to the right, while the force produced by the brake causes the vehicle to decrease its speed in this way the sign must be negative.
∑F = Fr
The movement remains forward, since the force produced by the movement is greater than the braking force.