Runoffs from an uranium mine stockpile have contaminated the surface water in a location. This might cause health problems among
1 answer:
You might be interested in
Answer:
Explanation:
We know that the magnetic Field of the Earth is 50\mu T, so the equation for
Hall effect voltage und magnetic field are defined as,
So,
1. Answer: Option C
Displacement is a vector quantity. It has both magnitude as well as direction. Hence, it can be positive, zero or negative. In the given question, downward direction is taken as negative. This we have come to know from the downward acceleration . The negative sign indicates that downward direction is considered negative.
Now, since the object is dropped from the top. The displacement should be negative, because the negative represent a downward direction.
2. Answer: velocity
The truck is travelling at 30 mph to the west. From the unit mph (miles per hour), we know its a magnitude of velocity. West indicates the direction. Hence, the given quantity is a vector -velocity.
It is not speed because speed only indicates the magnitude and not the direction. speed is a scalar quantity.