A needle used for sewing has a sharp point at one end. The person sewing often wears a thimble on a finger to push the needle through the fabric. State whether it is desirable to have a high or low pressure. Explain why this is desirable.

What is the difference between electrically neutral objects and electrically charged objects

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=