Answer:
i. + 22.5 m ii. 4.0 m
Explanation:
i. Image distance
Using the lens formula
1/u + 1/v = 1/f where f = focal length = + 18.0 m, u = object distance = distance of shark away from lens = + 90.0 m and v = image distance from lens = unknown
So, we find v
1/v = 1/f - 1/u
= 1/+18 - 1/+90
= (5 - 1)/90
= 4/90
v = 90/4
= + 22.5 m
So the image is real and formed 22.5 m away on the other side of the lens.
ii Length of Shark
Using the magnification formula, m = image height/object height = image distance/object distance. image height = 1.0 m where object height = length of shark.
m = image distance/object distance
= v/u
= +22.5/+90
= 0.25
0.25 = image height/object height
So,
object height = image height/0.25
= 1.0 m/0.25
= 4.0 m
So, the length of the shark is 4.0 m
Potential energy is stored energy in an object or system. Kinetic energy is when the object is in motion. Potential energy is not relative to an objects environment. Kinetic energy is relative to other moving and stationary objects in its main environment.
Answer:
Explanation:
The formula to be used here is that of the general gas law which is below
P₁V₁/T₁ = P₂V₂/T₂
where P₁ is the initial pressure (and can be represented as 1 atm)
V₁ is the initial volume (and can be represented as 1 cm³)
T₁ is the initial temperature (and can be represented as 1 °C = 274K)
P₂ is the final pressure (and would be 10 atm since the pressure increased 10 times)
T₂ is the final temperature (and would be 0.07°C = 273.07K since the temperature decreased 14 times; 1/14 = 0.07)
V₂ is the final volume which is unknown
Using the formula stated earlier
1 × 1/274 = 10 × V₂/273.07
1 × 1 × 273.07 = 10 × V₂ × 274
V₂ = 273.07/2740
V₂ = 0.099 ⇔ 0.1
Thus V₁:V₂ is 1:0.1
This means the volume of gas reduced 10 times (1/10) the original volume
Answer: forward
The child will continue to move forward at the before the crash speed. This is because the child at the instant of head on collision of the car will tend to continue the state of uniform motion the car exhibited as newton's first law states. Newtons first law: A body will continue to be at rest or in uniform motion with constant velocity/speed unless acted upon by an external force.
Explanation:
The child will continue moving forward until he/she encounters some obstruction or resistance which could be dangerous. In a safety design car, the child should collide with the SRS airbag right in front which gets activated for situations where the acceleration of the car is above 250m/s².
Thank you for reading and I hope this was helpful.
