Answer:
The solution is given below:
Explanation:
The computation of the speed is shown below
As we know that
Speed = distance ÷ time
where
distance is 2000 km
And, the time is 2.5 hours
SO, the speed is
= 2,000 ÷ 2.5
= 800 km/h
Now the distance would be the same i.e. 2,000 km
but the time is 2 hours
So, the speed is
= 2,000 km ÷ 2 hours
= 1,000 km/hr
The direction should be opposite to the first airplane
Answer:
a)
b)
c)
Explanation:
Given:
- mass of the object,
- height of the object above the spring,
- spring constant,
a)
When the object is dropped onto the spring whole of the gravitational potential energy of the mass is converted into the spring potential energy:
is the compression in the spring
b)
When there is a constant air resistance force of 0.6 newton then the apparent weight of the body in the medium will be:
Now the associated gravitational potential energy is converted into the spring potential energy:
c)
On moon, as per given details:
Answer:
Explanation:
According to the <u>law of universal gravitation</u>, which is a classical physical law that describes the gravitational interaction between different bodies with mass:
Where:
is the module of the force exerted between both bodies
is the universal gravitation constant.
and are the masses of the pencil and the teenager, respectively.
is the distance between both bodies
Solving for :
This is the force of gravitational attraction between the pencil and the teenager, which is very small in this case
Answer: Direct current is used in any electronic device with a battery for a power source. It is also used to charge batteries, so rechargeable devices like laptops and cell phones come with an AC adapter that converts alternating current to direct current
Explanation: