Answer:
Power and time
Explanation:
Given the power of an appliance, the energy transferred is given as the product of power and time. Normally, power is defined as the rate of energy transfer per unit time in a circuit and expressed as
P=E/t
Making E the subject of the formula then
E=Pt
Where P is power, E is energy transfer and t is time.
Clearly, energy transfer is determined by power of an appliance and time.
It is false that scientific advances have led to decreased energy efficiency and waste reduction.
Answer:
3) D: 31 m/s
4) D: 84.84 metres
Explanation:
3) Initial velocity along the x-axis is;
v_x = v_o•cos θ
Initial velocity along the y-axis is;
v_y = v_o•sin θ
Plugging in the relevant values, we have;
v_x = 31 cos 60
v_x = 31 × 0.5
v_x = 15.5 m/s
Similarly,
v_y = 31 sin 60
v_y = 31 × 0.8660
v_y = 26.85 m/s
Thus, magnitude of the initial velocity is;
v = √(15.5² + 26.85²)
v ≈ 31 m/s
4) Formula for horizontal range is;
R = (v² sin 2θ)/g
R = (31² × sin (2 × 60))/9.81
R = 84.84 m
This shows observational learning, as Ian is following what others are doing and what others are encouraged to do. This is in contrast to other kinds of learning like classical and operant conditioning, where people learn based on associations of an event and a result (rather than based on what other people are doing).
B. The suns gravity
hope this helps