An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train . When the engineer first
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Answer:
B. Landscape B
Explanation:
Shale is fine sediment pressed together to form rock.
Sandstone is larger (sand-grain-sized) sediment cemented together to form rock.
Shale erodes faster, as evidenced by the second attachment. That attachment shows erosion of a rock face consisting of interbedded shale and sandstone. The shale has receded significantly, leaving the sandstone layers with space between them.
Answer:
a) On Earth
490N
b) On the Moon
85N
c) On Mars
185N
d)in outer space traveling with constant velocity.
0
Explanation:
The weight is defined as:
(1)
Where m is the mass and g is the gravity
a) On Earth
Then, equation 1 can be used:
but 1N = Kg.m/s^{2}
Hence, the weight of the astronaut on Earth is
b) On the Moon
Hence, the weight of the astronaut on the Moon is
c) On Mars
Hence, the weight of the astronaut on Mars is
(d) in outer space traveling with constant velocity.
Tanking into consideration that the astronaut is traveling in outer space at a constant velocity, it can be concluded that the acceleration will be zero.
Remember that the acceleration is defined as:
Since the acceleration is the variation of the velocity in a unit of time.
Therefore, from equation 1 is gotten.
Remember that g is the acceleration that a body experience as a consequence of the gravitational field.