Answer:
the average speed in annual work out is 46.5
Answer:
18%
Explanation:
There are two equal and opposite forces on a floating object: weight and buoyancy.
W = B
The weight of an object is its mass times gravity: W = mg
Buoyancy is the weight of the displaced fluid: W = mf g
Plugging in:
mg = mf g
m = mf
Mass is density times volume:
ρV = ρf Vf
Solving for the ratio of Vf / V:
Vf / V = ρ / ρf
Given that ρ = 0.82 g/mL and ρf = 1.00 g/mL:
Vf / V = 0.82
That means 82% of the object's volume (and therefore, 82% of its mass, assuming uniform density) is submerged. Which means that 18% is above the water line.
Answer:
1.96 m/s^2
Explanation:
angle of inclination, θ = 30.6°
coefficient of friction, μ = 0.36
Acceleration of the crate
a = g Sin θ - μ g Cos θ
a = 9.8 ( Sin 30.6 - 0.36 x Cos 30.6)
a = 9.8 ( 0.509 - 0.309)
a = 1.96 m/s^2
Thus, the acceleration f the crate is 1.96 m/s^2.
Answer:
The "trolleys" did not collide with each other because <em>their poles repelled. </em>
Explanation:
Magnets have poles located at their ends and these are the "north pole" and the "south pole."
If the north pole of one magnet will be faced to the south pole of another magnet, <em>they will attract each other</em> or <u>pull towards each other.</u> The opposite will happen when the south pole of one magnet will be faced with the same pole from another magnet. <em>They will repel each other</em> or<u> pull away from each other.</u>
Since the magnets attached to the trolleys were U-shaped, this means that the north and south poles are located at the<u> end of the magnets, which face the same direction. </u>So, once the magnets of the two trolleys move towards each other, their poles will repel because same poles will face each other.
So, this explains the answer.
The wire encased in iron. This is because iron conducts current so the fuse would still work well above the rated current!
