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SCORPION-xisa [38]
3 years ago
8

Flooding on rivers is caused by human activity rather than natural events. Please select the best answer from the choices provid

ed T F
Physics
2 answers:
Olenka [21]3 years ago
5 0
False flooding rivers can be caused by weather and can also happen naturally over time.
Debora [2.8K]3 years ago
4 0

Answer:

False

Explanation:

Rivers are natural sources of water. Human is not responsible for its construction and management.

When flood comes in a river this process can not be maintained by human as they have no role in construction of it. Thus, the given statement is false.

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1. James drives 400 km in 5 hours to his grandmothers. What are the units for speed going to be?
Airida [17]

Answer:

See the answer below

Explanation:

1. Speed is calculated as the ratio of distance and time. Hence, Jame's speed can be calculated as:

       400/5 km/hr = 80 km/hr

The unit for the speed would be km/hr. This can also be converted to m/s:

80 km = 80,000 m

1 hr = 3,600 s

80 km/hr = 80,000/3600 m/s = 22.22 m/s

2. Since James drove 400 km in 5 hours, the distance he drove is 400 km.

3. The time it took for James to get there is 5 hours.

6 0
2 years ago
Which statements describe magnetic poles? Check all that apply.
Alex_Xolod [135]

Explanation:

Magnet: It has two poles: South pole and North pole.

Magnetic field lines are stronger near the poles of the magnet.

Same poles repel each other. There is a magnetic force of repulsion between the same poles. North- North poles repel each other.

Unlike poles attract each other. There is magnetic force of attraction between the opposite poles. South- North poles attract each other.

Mono poles cannot exist.

From the given statements, the magnetic poles are described by:

A north pole must exist with a south pole.

Two south poles placed near each other will repel each other.

A north pole and a south pole placed near each other will attract each other.

5 0
2 years ago
Read 2 more answers
How is the frictional force produced?​
andrew-mc [135]

Answer:

frictonal force due to the surface of irregularities

5 0
3 years ago
A heat engine takes in 840 kJ per cycle from a heat reservoir. Which is not a possible value of the engine's heat output per cyc
zhannawk [14.2K]
We have by the first law of thermodynamics tha energy is preserved, hence we cannot have over 840kJ per cycle. We have by the laws of thermodynamics (the 2nd one in specific) that the entropy of a system cannot increase. We cannot have an output of  840 kJ per cycle from a heat engine because then that would mean that the entropy would stay the same, while any heat engine increases it. Hence, any value \geq 840 kJ is acceptable.
8 0
3 years ago
Quito, Ecuador has an average altitude of 9,350 ft. On a standard day, pressure gage A in a laboratory experiment reads 63 kPa a
kolezko [41]

Explanation:

Below is an attachment containing the solution.

8 0
3 years ago
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