X-rays are used in medical applications to produce images of Bones tissues and organs x-rays are capable of penetrating tissue such as Skin but are less capable of penetrating bone this property of x-rays derives from which characteristic of the Rays a. their short wavelengths
b. their long wavelengths
c. their small amplitudes
d. their large amplitudes ​

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?