As the energy of a wave increases its increase
a- wavelength
b- frequency
c-amplitude
an object to be located by sonar can be assumed to be farther away when the echo takes a time to return
a-longer
b- shorter
( answer both)

Can someone explain to me how to do this problem ?

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation