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harina [27]
3 years ago
8

water is useful for reducing friction between objects. However, you also learned that (due to friction) moving water causes roug

h rocks to become smooth. How can this be?
Physics
2 answers:
nikdorinn [45]3 years ago
7 0

Answer:

Water in rivers can carry rocks through the water and rub them against other rocks,which over a long period of time makes them smooth.

sertanlavr [38]3 years ago
4 0
Water in rivers can carry rocks through the water and rub them against other rocks, which over long periods of time makes them smooth.
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A motorcycle is capable of accelerating at 5.1 m/s starting feom rest how far can it travel im 1.5 seconds
saul85 [17]

5.1 m/ s


~Multiply 1.5 on both sides since you’re trying to finding out how far it can travel in 1.5 seconds


5.1 x 1.5= 7.65

s x 1.5= 1.5


So a motorcycle can travel 7.65 m in 1.5 seconds.



6 0
3 years ago
What is the source of geothermal energy? User: What is the source of geothermal energy?
bazaltina [42]

The answer is; C

In particular points in the earth’s surface, underground water is naturally heated to steam that can be harness for geothermal energy. The steam that ejects from the ground with high kinetic energy can be used to turn turbines that generate electricity. The underground water is usually heated by the hot rocks beneath that are subjected to the immense heat of magma or the enormous pressure of overlying crust.  


8 0
3 years ago
Read 2 more answers
Superman throws a boulder of weight 3800 n at an adversary on the surface of the earth, where the magnitude of the acceleration
evablogger [386]
The weight of the boulder is 3800 N, therefore its mass i s
3800/9.8 = 387.755 kg

If the horizontal acceleration is 12.8 m/s², then the horizontal force applied is
F = (387.755 kg)*(12.8 m/s²) = 4.963 x 10³ n = 4.963 kN

Answer: 4.963 kN
5 0
4 years ago
The same net force is applied to two bodies. The first body acquires half of the acceleration of the second body. What is the re
Yanka [14]

The mass of the first body is double the mass of the second body.

This all revolves around Newtons 2nd law of motion that states F=m*a.

If we understand that body one has the same force applied but half of the acceleration than body two, we can easily understand that it has to do something with the objects mass. This is because mass and acceleration in newtons 2nd law are inversely proportional. This means if and objects force stays the same, but it’s mass doubles, then the acceleration must be half its original value. And if the acceleration doubles and the force stays constant than the mass must have halved from its original value. It sounds quite complicated but it’s very simple. Hopefully this helps!!!

4 0
3 years ago
An arrow is projected by a bow vertically up with a velocity of 40 m/s, and reaches a target in 3 s. What is the velocity of the
Fittoniya [83]

Answer:

Explanation:

Step one:

given data

initial velocity u= 40m/s

time taken t=3seconds

final velocity v=?

Step two:

applying the first equation of motion

v=u-gt---  (the -ve sign implies that the arrow is against gravity)

assume g=9.81m/s^2

v=40-9.81*3

v=40-29.43

v=10.57m/s

Step three:

how high the target is located

applying

s=ut-1/2gt^2

s=40*3-1/2(9.81)*3^2

s=120-88.29/2

s=120-44.145

s=75.86m

6 0
3 years ago
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