The first answer is W and Z, since they appear to be a period apart. Dont know the second question. I did what I could, hope someone can answer the second.

5 0

2 years ago

If an airplane with a mass of 5 tons has gravitational potential energy of 1000 kilojoules, what is its height?

VLD [36.1K]

The gravitational potential energy of an object, measured with respect to the ground, is given by
$U=mgh$
where m is the object's mass, g is the gravitational acceleration and h is the height of the object measured from the ground.

In our problem, the mass of the plane is m= 5 tons = 5000 kg, while the potential energy is
$U=1000 kJ=1 \cdot 10^6 J$
so we can re-arrange the previous formula and use these data to calculate h, the height of the airplane:
$h= \frac{U}{mg}= \frac{1 \cdot 10^6 J}{(5000 kg)(9.81 m/s^2)} =20.39 m$

3 0

3 years ago

The physical quantity that cannot be defined in terms<br>physical quantities?

tensa zangetsu [6.8K]

There are two types of physical quantities, that is , base quantities and derived quantities. Base quantities are physical quantities that cannot be defined in terms of other quantities

4 0

2 years ago