Answer:
The JB-9 carries 4.5 kilograms (10 lb) of kerosene fuel that burns through two vectored thrust AMT Nike jet engines at a rate of 3.8 litres (1 US gallon) per minute for up to ten minutes of flying time, depending on pilot weight.
Explanation:
What you need to do here is a little bit of research, namely into what smartphones are made of. Once you find each component, you can find out what elements are in each component, and from there simply find whatever elements are not radioactive.
To solve this problem it is necessary to apply the concepts related to Malus' law. Malus' law indicates that the intensity of a linearly polarized ray of light that passes through a perfect analyzer with a vertical optical axis is equivalent to:
Indicates the intensity of the light before passing through the Polarizer,
I = The resulting intensity, and
= Indicates the angle between the axis of the analyzer and the polarization axis of the incident light.
There is 3 polarizer, then
For the exit of the first polarizer we have that the intensity is,
For the third polarizer then we have,
Replacing with the first equation,
Therefore the transmitted intensity now is of the initial intensity.
Answer:
Car B is travelling at a faster speed
Explanation:
We are given;
Speed of car A; V_a = 30 m/s
Speed of car B; V_b = 110 km/h
Now, V_a is already in m/s, so let's convert V_b to m/s too.
From conversions, 36 km/h = 10 m/s, therefore, 110 km/h would give;
(110 × 10)/36 = 30.56 m/s
Thus, V_b = 30.56 m/s
Comparing both speeds in m/s, we can see that 30.56 m/s > 30 m/s.
Thus, Car B is travelling at a faster speed.
Answer:
option C
Explanation:
Let mass of the bullet be m and velocity be v
mass of gun be M and bullet be V
now,
using conservation of momentum for gun 1
(M+m) V' = 2 mv + 3 MV
V' = 0
3 M V = - 2 mv
momentum of gun 1 =- 2 mv---------(1)
now for gun 2
(M+m) V' = mv + MV
V' = 0
M V = - mv
momentum of gun 1 = -mv-----------(2)
dividing equation (1) by (2)
the correct answer is option C