Answer:
Option D
Explanation:
Taking 2020 unit test for edu right now.
Answer:
Explanation:
The path of waves reaching directly and through reflection from ionosphere will form a isosceles triangle.
Let the height be h . This will be height of a triangle of equal side whose base is of length 32 km. we shall calculate the length of one side of this triangle .
this length be l
l² = 16² + h²
l = √(256 +h² )
2l = 2√(256 +h² )
path difference = 2l - 32 km
For destructive interference
path difference = wavelength /2 for minimum height .
2l - 32 = .344/2
2√(256 +h² )- 32 = . 172
2√(256 +h² ) = 32.172
4(256 +h² ) = 1035
(256 +h² ) = 258.76
h² = 2.76
h = 1.66 km
Answer:
<h3>The answer is 22.26 N</h3>
Explanation:
The force acting on an object given the mass and acceleration we use the formula
<h3>force = mass × acceleration</h3>
From the question
mass = 5.3 kg
acceleration = 4.2 m/s²
We have
force = 5.3 × 4.2
We have the final answer as
<h3>22.26 N</h3>
Hope this helps you
Answer:
The acceleration of the cart is 283.54g
Explanation:
It is given that,
Initial speed of the car, u = 35 km/h = 9.72 m/s
Finally, it stops, v = 0
Diameter of the dime, d = 1.7 cm
Let a is the acceleration of the car. Using third equation of motion to find it as :
So, the acceleration of the car is and it is decelerating.
Since,
So,
So, the acceleration of the cart is 283.54g. Hence, this is the required solution.
On top of a hill near the south pole of the Moon is a sunny spot that might make the ideal place for a lunar outpost, according to preliminary analysis of data from the European Space Agency (ESA) satellite SMART-1.