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BabaBlast [244]
3 years ago
14

Help with i) and ii) pls >_

Physics
2 answers:
alina1380 [7]3 years ago
4 0

Answer:

4 it the corrcert anser

Explanation:

Naya [18.7K]3 years ago
3 0
The correct answer has to be 4
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Billiard ball A strikes another ball B of the same mass, which is at rest, such that after the impact they move at angles ΘA and
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Answer:

7.6427m/s

Explanation:

Given:v_a=4.7m/s, \theta_a=33.0\textdegree and \ v_b=4.5m/s

#Applying the conservation of momentum along the x-axis:mv_i=mv_acos\theta_a+mv_bcos\theta_b

#And along y-axis:

0=-sin\theta_a+mv_bsin\theta_b

#Solving  for \theta_b:

sin\rheta_b=\frac{v_a}{v_b}sin\theta_a=4.7/4.5\times sin33.0\textdegree\\=0.5688\\\therefore \theta_b=34.67\textdegree

#By substitution in the x-axis equation:

v_i=4.7cos 33.0\textdegree +4.5cos 34.67\textdegree\\=7.6427m/s

Hence the original speed of the ball before impact is 7.6427m/s

4 0
3 years ago
Tsunami waves have ?
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3 years ago
What are the units for measuring current and voltage
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3 years ago
Which describes what happens when a balloon is rubbed with a wool cloth?
777dan777 [17]
When a balloon is rubbed with a wool cloth, e<span>lectrons move from the atoms in the balloon to the atoms in the cloth, causing the cloth to have a negative charge. Therefore, the answer is B. Before they were rubbed together, they both had balanced charges. However, after rubbing them, the wool is left with the positive charge, and the balloon with the negative. This causes the atoms in the cloth to flow to the balloon, leaving the cloth with a negative charge.</span>
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Answer:

Electrical energy to thermal energy

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The form of energy transforms to what other form when you turn on a steam iron is the conversion of Electrical energy to thermal energy

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