An electromagnet is created using a battery, an insulated copper wire and an iron nail. The wire is wrapped around the nail 30 t
1 answer:
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Answer:
The width of the river is
Explanation:
From the question we are told that
The distance of the base line is D = 130 m
The angle is
A diagram illustration the question is shown on the first uploaded image
Applying Trigonometric Rules for Right-angled Triangle,
Now making z the subject
Answer:
Explanation:
Given data
Baseball mass m₁=0.15 kg
initial speed v₁=0
Bullet mass m₂=0.032 kg
final speed v₂=230 m/s
To find
height h=?
Solution
From conservation of momentum we know that
Now from the conservation of mechanical energy