Why are most large astromical telescopes reflecting telescopes rather than refracting telescopes?

So i want to start a dance academy. what do i do

A large electroscope is made with "leaves" that are 70 cm long wires with 19 g spheres at the ends. when charged, nearly all the charge resides on the spheres.

Identify three different kinds of Physical change that could happen to a plastic spoon

8. If a circuit has a fuel cell that pushes 12V, and a current that runs 6A, what will its resistance be? a) 2.0 2 b) 2.52 c) 3.0 22 d) 3.522

What is the 3d model of oxygen molecule

On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3, length 78.4 cm and diameter 2.30 cm from a storage room to a machinist. Calculate the weight of the rod, w. Assume the free-fall acceleration is g

All ions are atoms with a what? A. positive charge B. Negative charge C. Charge D. Neutral charge

What current flows when a 35 v potential difference is imposed across a 1.4 kω resistor?

What particles are found in the area surrounding the necleus

A 10 kg mass is lifted to a height of 2 m. What is the potential energy of the object