B. The resistance is directly proportional to length and inversely proportional to cross sectional area
C) light waves travel faster than sound waves
You were correct
Explanation:
It is given that,
The period of the carrier wave, T = 0.01 s
Let f and
are frequency and the wavelength of the wave respectively. The relationship between the time period and the frequency is given by :


f = 100 Hz
The wavelength of a wave is given by :



So, the frequency and wavelength of the carrier wave are 100 Hz and
respectively. Hence, the correct option is (c).
Answer:
1.38*10^18 kg
Explanation:
According to the Newton's law of universal gravitation:

where:
G= Gravitational constant (6.674×10−11 N · (m/kg)2)
ma= mass of the astronaut
mp= mass of the planet

so:

Answer:
141.56 N.
Explanation:
Data given:
Weight of the box= 200.2 N
Angle with the horizontal= 37.1°
Solution;
Gravitational force on the box,
= weight of the box
= 200.2 N
Component of gravitational force along plane =
( ∅ )
= W * (sin∅)
= (200.1) * sin (37.1°)
= 141.56 N