Answer:
b
Explanation:
n = m(g +a)
n= normal force (N)
m=mass (kg)
g=acceleration of gravity
a= acceleration of elevator
rearrange:
a= n/m - g
a= (810 N/73 kg) - 9.8 m/s ^2
a= 1.3 m/s ^2 up
and the acceleration is upwards bc her weight is less than the scale reading
Answer:
The human major features with the analogous of camera are mentioned.
Explanation:
There are the following major features of human eye which are analogue with the camera:
- Camera will have shutters which controls light entering into it, human eye consists of Diaphragm which also functions same.
- Both gives Real & inverted images.
- In camera film records image, in eye image is focused on retina and it is converted into electrical impulses.
- Pupil and iris acts as aperture of camera.
Answer:
5000 millimeters
Explanation:
1 meter=100 centimeters
50 centimeter=0.5 meters❌
1 meter = 10 decimeters
500 decimeters = 50 meters❌
1 meter =1000 milimeters
5000 milimeters = 5 meters✔
Answer:
T = 44.35 °C
Explanation:
d = 32cm
R = 16 cm
Lsteel = 10m
T1 = 20° C
Space = 0.3cm
The space between the sphere and the floor is represented by δL(total) after the temperature increases.
As the temperature increases, both will expand.
So,
0.3 x 10^(-2) = δL(steel) + δR(brass)
= {L(o) x α(steel) x δT} + {R(o) x {α(brass) x δT}
= {10 x 1.2 x 10^(-5) x (T-20)} + {0.16 x 2 x 10^(-5) x (T-20)}
= 12.32 x 10^(-5) x(T-20)
Therefore (T-20) = (0.3 x 10^(-2)) / {12.32 x 10^(-5)}
T = 20 + 24. 35 = 44.35 °C
