Answer:
Does more sunlight make rose bushes grow taller?
Explanation:
When conducting a research, the researcher usually poses research questions in order to confirm or disprove the research hypothesis. A research question addresses the key issues and questions that the research project is intended to answer. Good research questions always aim at improving the body of knowledge on the selected topic of the research. Research questions must be narrowed down to specific details of the topic. They must also be testable, they must not be vague.
If I am studying the effect of sunlight on rose bushes, then the question, 'does more sunlight make rose bushes grow taller?' Is apt to the research because it can be tested by exposing various thorn bush plants to varying degrees of sunlight and recording my observation.
Answer:
1.5 m/s²
Explanation:
Draw a free body diagram. There are three forces acting on the sea lion: gravity pulling down, normal force perpendicular to the ramp, and friction parallel to the ramp.
Sum of the forces perpendicular to the incline:
∑F = ma
N − mg cos θ = 0
N = mg cos θ
Sum of the forces parallel to the incline:
∑F = ma
mg sin θ − Nμ = ma
Substitute for N:
mg sin θ − (mg cos θ) μ = ma
g sin θ − g cos θ μ = a
a = g (sin θ − μ cos θ)
Given θ = 23° and μ = 0.26:
a = 9.8 (sin 23 − 0.26 cos 23)
a = 1.48
Rounded to two significant figures, the sea lion accelerates at 1.5 m/s².
Explanation:
Electric field intensity E is defined as the electric (Coulomb) force on a unit test (1 C) charge. Mathematically, it is given by :
The electric force is given by :
Where
Q and q are electric charges
d is the distance between charges
The electric field intensity at a distance d from the center is given by :
So,
Hence, this is the required solution.