Answer:
θ = 61.3°
Alicia must swim at an angle of 61.3°
Explanation:
Parameters given include:
Width of the river = 100 m
Alicia's speed in still water = 2.5 m/s
Speed of river's current = 1.2 m/s
The angle she needs to swim can be determined by combining the velocities, taking into account the current's influence.
Her swimming speed aimed against the current must offset the current's velocity;
2.5cosθ - 1.2 = 0
2.5cosθ = 1.2
cosθ = 1.2/2.5
θ = cosinverse(1.2/2.5)
θ = 61.3°
0.04m²
Explanation:
Known values:
Pressure = 250000Pa
Weight = 40000N
Unknown:
Area of each foot =?
Solution:
Pressure is defined as the force applied per unit area of an object
Pressure =
To determine the area;
Area =
Area = = 0.16m²
The force exerted by all four feet amounts to 0.16m²
thus, the area for each foot is = 0.04m²
Learn more:
Answer:
B= ≅8.06
Explanation:
Applying the Pythagorean theorem:
=
+
Here, C denotes the hypotenuse length, while A and B signify the lengths of the other two sides of the triangle. We can calculate B's length knowing the hypotenuse is 9 and A is 4.
=
+
81= 16+
81-16=
B= ≅8.06