Answer:
B. 8,437.5 J
Explanation:
<u>Given the following data;</u>
Height = 400m
Mass = 75kg
Velocity = 15m/s
Time = 10 secs
To find the kinetic energy of the skier?
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
<em>Where;</em>
- <em>K.E represents kinetic energy measured in Joules. </em>
- <em>M represents mass measured in kilograms. </em>
- <em>V represents velocity measured in metres per seconds square. </em>
<em>Substituting into the equation, we have;</em>
K.E = 8,437.5 Joules.
Answer:
Explanation:
(a)
In event A , one has to walk along diameter of the field from X to Y.
In this event , walk is along a straight line , both displacement and distance covered will be same.
Distance = displacement = 1 km.
option ii is correct .
(b )
radius of circular track r = 0.5 km
length of track = circumference = 2π r
= 2 x 3.14 x .5 = 3.14 km
Length of running in event B is 15.7 km
No of rounds = 15.7 / 3.14 = 5
option iii is correct .
( c )
speed = length of race / time
time = length of race / speed
= 15. 7 km / 3.14 km /h
= 5 hours .
option iv is correct option.
(d)
In event C , length of race is 25.12 km
speed = length of race / time taken
= 25.12 km / 4 hour
= 6.28 km/h .
Option i is correct.
Answer:
178.4 times
Explanation:
We have Newton formula for attraction force between 2 objects with mass and a distance between them:
where is the gravitational constant on Earth. is the masses of the 2 objects. and R is the distance between them.
From here we can calculate the ratio of gravitational force between the moon and the sun
We can divide the top and bottom by G and M
So the gravitational force of the sun is about 178 times greater than that of the moon to an object on Earth
Answer: Describe how plates create mountain ranges like the Himalayas.
Answer- Most of the world's largest mountains form as plates collide at convergent plate boundaries. This creates mountains. Folding and faulting in these collision zones makes the crust thicker. The world's highest mountain range, the Himalayas, is growing as India collides with Eurasia
2. Diagram how pulling apart continental crust could create mountains and basins. What are the mountains and
basins called? Answer- When tensional stresses pull crust apart, it breaks into blocks that slide up and drop down along normal faults. The result is alternating mountains and valleys, known as a basin-and-range
3. Why don’t strike slip faults create mountains? Answer-When tensional stresses pull crust apart, it breaks into blocks that slide up and drop down along normal faults. The result is alternating mountains and valleys, known as a basin-and-range
Explanation: I'm really sorry that its a lot but I hope it helps :)