Answer:
2.3 kg
Explanation:
L = length of the plank = 4 m
M = mass of the plank = 7 kg
m = mass of cat = ?
= Weight of the cat = mg
= Weight of the plank = Mg = 7 x 9.8 = 68.6 N
ED = 2 m
CD = 1.5 m
EC = ED - CD = 2 - 1.5 = 0.5 m
Using equilibrium of torque about sawhorse at C
(EC) = (CD)
(68.6) (0.5) = (mg) (1.5)
(68.6) (0.5) = (m) (1.5) (9.8)
m = 2.3 kg
A magnetic field. the answer is d
I think the answer is D. the opponent process theory
Answer:
Sir Isaac Newton
Explanation:
The laws according to which bodies move and how one body attracts another body were developed by Newton. The three laws of motion and the law of universal gravitation were developed by Newton.
In the seventeenth century almost all the refracting telescopes exhibited color distortion. Newton believed that white light had a spectrum which was the reason for this distortion. The lens of a refracting telescope used to act like a prism which caused the dispersion of light proving Newton's hypothesis.
Can you add a picture or type the options down?
