Answer:
(we need the mass of the astronaut A)
Explanation:
We can solve this by using the conservation law of the linear momentum P. First we need to represent every mass as a particle. Also we can simplify this system of particles by considering only the astronaut A with an initial speed 
of 0 m/s and a mass 
and the IMAX camera with an initial speed 
of 7.5 m/s and a mass 
of 15.0 kg.
The law of conservation says that the linear momentum P (the sum of the products between all masses and its speeds) is constant in time. The equation for this is:
By the law of conservation we know that 
For 
(final linear momentum) we need to treat the collision as a plastic one (the two particles stick together after the encounter).
So:
80/60=
1.3333...........................................
Answer:
The value is 
Explanation:
From the question we are told that
The radius of curvature is 
Generally the radius of curvature is mathematically represented as
Here 
is the focal length hence
=> 
=>
Answer:
A
Explanation:
Because both the elements are non-metals
Because we can tast the the food already and we get hungry.
