Answer:
3 Objects that carry instruments into the stratosphere to measure atmospheric conditions
Explanation:
Weather balloons are objects that carries instruments into the stratosphere to measure atmospheric conditions.
They are very important weather measuring device that helps meteorologists in their fore casts.
These balloons are specially designed for high altitudes. They carry very sensitive devices that are very useful in collecting information about temperature, precipitation, pressure e.t.c
Answer: more light passes through
Explanation:
The correct answer is: Option (A) 75 J
Explanation:
First, be careful with the units here. As you can see it is mentioned that there is a 50N box. It means that the weight (<em>mg</em>) of the box is given as the unit is <em>Newton</em>, not its mass (which is in kg).
As,
Potential-energy = mass * acceleration-due-to-gravity * height
PE = m*g*h --- (A)
In equation (A), mg is actually the weight of the box, which is given.
mg = 50N
h = height = 1.5m
Plug the values in equation (A):
PE = 50 * 1.5 = <em>75 J (Option A)</em>
Answer:
c) 17 m
Explanation:
From the conservation of energy.
Change in kinetic energy= change in potential energy
Now,
Now according to the situation.
Here, v is the velocity, m is the mass of an object, h is the height, g is the acceleration due to gravity.
Given that the speed of the bicycle is
And the acceleration due to gravity is
Substitute these values.
Which means it is equivalent to 17 m
Therefore, the maximum height is 17 m
They live half their lives in water and most of their life on land
