Explanation:
Wind resistance is a kind of friction we usually try to minimize. It makes our cars and planes run less efficiently. At the same time though, we need friction between our tires and the road to move, as well as friction in our brakes to stop. We wouldn't be able to walk without friction, or start a campfire by rubbing sticks together.
Answer:
virtual
Explanation:
because the light rays do not meet at the image position
the other options are definitely wrong because
characteristics of a plane mirror images are that,
it is the same size as the object
it is upright
Answer:
The molar percent of ethanol in the air is 2.6%
Explanation:
Molar percent of ethanol in the air = partial pressure of ethanol/total pressure × 100 = 19.5 torr/758.6 torr × 100 = 2.6%
A tornado is a natural force It is a very strong wind that causes thing to damage
Answer:
4374 km/h
Explanation:
The momentum of the 1500 kg object is given by:
where
m = 1500 kg is the mass
v = 1.62 m/s is the velocity
Substituting,
We know that the smaller object of mass m' = 2 kg has the same momentum, so we can find its velocity by re-arranging the same equation:
Now to convert into km/h, keep in mind that:
1 km = 1000 m
1 h = 3600 s
So, we find