Answer:
potassium
Explanation:
i know its very reactive, so much so it can't be found openly in nature, so i believe potassium is the most reactive in period 4
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
<span>the color of a star is primarily determined by its : suface temperature.
The surface temperature is used to estimate the wavelength that radiated within.
the star with lower wavelegth tend to have purple-ish color, while the one with higher wavelength tend to have orange-ish color</span>
Turning on a light switch converts mechanical energy to electrical and radiant energy. So Mechanical energy
