I believe it’s all of the questions
Answer:
Explanation:
Acceleration is the change in velocity with respect to time.
Acceleration = change in velocity/Time
Acceleration = final velocity - initial velocity/Time
Given initial velocity = 10m/s
Final velocity = 20m/s
Time taken = 4s
Acceleration = 20-10/4
Acceleration = 10/4
Acceleration =2.5m/s²
For the second part of the question:
Given parameters
initial velocity = 15m/s
acceleration = -3m/s²
time = 4seconds
a = v-u/t
-3 = v-15/4
cross multiply
-12 = v-15
add 15 from both sides
-12+15 = v-15+15
3 = v
<em>Hence the final velocity of the car is 3m/s</em>
Answer:
Limestone cave collapsing due to changes in sea level.
Explanation:
Sinkholes are common where the rock below the land surface is limestone or other carbonate rock, salt beds, or in other soluble rocks, such as gypsum, that can be dissolved naturally by circulating ground water. Sinkholes also occur in sandstone and quartzite terrains.
Answer:
Velocity of proton will be equal to 4500 m/sec
Explanation:
We have given that proton moves right angles through a magnetic field
So angle between magnetic field and velocity of proton is 
Magnetic field B = 0.025 Tesla
Charge on proton 
Magnetic force on the proton is given 
Magnetic force on a moving charge particle is equal to 
So 
v = 4500 m/sec
So velocity of proton will be equal to 4500 m/sec
Answer:
A hydraulic ram presses and shapes a solid aluminum billet into a hollow shell, the open top of which is closed and threaded. The newly formed cylinder then undergoes a precisely controlled heat-treatment regimen that adds strength and durability.
After being thoroughly tested to standards established by regulatory agencies, the cylinder is painted or receives a brushed or shot-blasted exterior finish. The result is a seamless, lightweight aluminum cylinder with a consistent wall thickness and naturally corrosion-resistant oxide finish that make it ideal for high-pressure gas containment.
Hoop-wrapped composite cylinders
These cylinders consist of an all-aluminum inner cylinder or “liner” capable of holding the same pressure as a comparably-sized all-aluminum cylinder. The “barrel” or middle cylindrical portion of this liner is wrapped with resin-impregnated fiber (typically fiberglass or aerospace-grade carbon) that reinforces the cylinder walls and enables the finished cylinder to hold higher pressure. The crown and base of the liner are not wrapped.
Full-wrapped composite cylinders
A Luxfer-manufactured lightweight aluminum liner is fully wrapped with layers of fiber in a strong, impact-resistant epoxy resin matrix. Fiber (typically fiberglass or aerospace-grade carbon) is applied in proprietary patterns to maximize durability and performance.
The result is an ultra-lightweight, extremely strong composite cylinder capable of operating at higher pressures than standard all-aluminum cylinders. Luxfer full-wrapped composite cylinders are available in a wide range of sizes and capacities from small breathing-air cylinders to very large alternative fuel cylinders. In addition to liners used in Luxfer’s own full-wrapped composite cylinders, Luxfer also manufacturers custom liners for third-party customers.
Explanation:
