Calculating Wavelength
The speed of all electromagnetic waves is 3.00 x 108 meters per second. What is the wavelength of an X-ray with a
frequency of 1.18 x 1018 Hz?
2.54 x 1026 meters
3.93 x 100 meters
2.54 x 10-10 meters
3.93 x 10-11 meters

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)