When you double the speed of your car, your braking distance quadruples. every time you double your speed, you multiply your braking distance by four.

6 0

2 years ago

Give two ways in which the water vapour changes as it passes down the glass tube in the condenser

SCORPION-xisa [38]

<span>It changes from a liquid into a solid which means it is changing states. It also is changing temperature due to the condenser increasing or decreasing the temperature in order for the vapor to be transformed in liquid.</span>

6 0

3 years ago

A weightlifter lifts a 250-kg mass 0.5 meters above his head, how much PEg does the mass have (Note: g=9.8 m/s2)? Round your ans

Anna71 [15]

The Gravitationa potential energy of the mass (PEG) is given by:
$U=mgh$
where
m is the mass
g is the gravitational acceleration
h is the heigth of the mass above the reference level (the ground)

In this problem, $m=250 kg$ and $h=0.5 m$ , therefore the gravitational potential energy of the mass is:
$U=mgh=(250 kg)(9.8 m/s^2)(0.5 m)=1225 J$

6 0

3 years ago

Read 2 more answers