3- Define light year. What quantity does it measure? what is one light year equal to in sl unit?​

about light year

Explanation:

The light-year is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometres (9.46×1012 km) or 5.88 trillion miles (5.88×1012 mi).

Astronomical units: 63241 au; 0.3066 pc

Metric (SI) units: 9.4607×1015 m; 9.46075 Pm

Imperial & US units: 5.8786×1012 mi

Unit system: astronomy units

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.