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:
Their experimental design lacks control group
Explanation:
Based on what I read, the scientists don't have a control group as one of the main groups thus they cannot, in scientific sense, say that the medicine is better or worse. You always need a control group receiving no intervention because then we can compare groups and assess the effectiveness of that intervention (in our case if we had control group vs people who received the medicine, we could see if the people who received the medicine had improved condition etc when compared to participants who did not receive anything)
Answer:
trail mix, soup, and gold
hope this helps
have a good day :)
Explanation:
Answer:
In explanation
Explanation:
This question can be explained by using Newton Second Law of motion:
where,
F = Force applied
m = mass of object
a = acceleration of object
We are given a constant acceleration of 25 m/s² in case of both bowling ball and tennis ball.
Therefore,
It is clear from this equation that for constant acceleration, the force required for the object is directly proportional to the mass of the object.
<u>Since, the mass of bowling ball is greater than the tennis ball. Therefore, bowling ball takes more effort than tennis ball to accelerate to 25 m/s²</u>