Answer:
specifically 30º west of the north
Explanation:
This exercise can be solved using the composition of vectors, let's call the speed of the river that goes east (v₁ = 8 mi / h) to the speed of the boat (v₂ = 16 mi / h) and the desired speed from south to north (v₃ =?). Look at the attachment to be clear about the vectors
Let's use the Pythagorean triangle
v₃² = v₁² + v₂²
Let's calculate v₂
v₂² = v₃² - v₁²
v₂ = √ (16² - 8²)
v₂ = 13.86 mi / h
To find the angle we use trigonometry
sin θ = v1 / v3
θ = sin⁻¹ (v1 / v3)
θ = sin⁻¹ (8/16)
θ = 30º
The boat must be pointed at 30º with respect to the south-north direction, specifically 30º west of the north
Answer:
The answer is below
Explanation:
When a gallon is blown the air energy is saved as potential energy which is compressed inside the balloon. However, when the balloon is released without trying its neck, the air energy quickly turned to kinetic energy, in which the air energy keeps moving as the balloon float around the space.
Hence, in short, what happens in terms of energy when you blow up a balloon and release it without trying its neck is that the air energy moves from potential energy to kinetic energy.
Answer:
Wave interference is the phenomenon that occurs when two waves meet while traveling along the same medium. The interference of waves causes the medium to take on a shape that results from the net effect of the two individual waves upon the particles of the medium.
Explanation:
Answer:
Explanation:
The intensity of a star noticed at a certain distance is inversely proportional to the square of distance. Then:
The intensity of the Sun in Jupiter relative to Earth is:
Answer:
2.75 g/cm³
Explanation:
given,
Volume of unknown sample, V = 3.61 cm³
mass of the sample, m = 9.93 g
density = ?
We know,
Hence, density of the unknown sample is equal to 2.75 g/cm³