(AWS) is a subsidiary of Amazon that provides on-demand cloud computing platforms and APIs to individuals, companies, and governments, on a metered pay-as-you-go basis. These cloud computing web services provide distributed computing processing capacity and software tools via AWS server farms.
Is C4 a good opening?
The English Opening is a chess opening that begins with the move: . 1. c4. A flank opening, it is the fourth most popular and, according to various databases, anywhere from one of the two most successful to the fourth most successful of White's twenty possible first moves.
Is C4 the same as A4?
This means that C4 is slightly larger than A4, and slightly smaller than B4. The practical usage of this is that a letter written on A4 paper fits inside a C4 envelope, and both A4 paper and C4 envelope fits inside a B4 envelope.
Are C4 plants larger than C3 plants?
The study, which is the biggest of its kind, discovered C4 plants not only grow up to 100 per cent faster than common C3 plants, but they also make 'cheaper' quality leaves allowing them to produce 50 per cent more roots.
What is the length of a C4 Corvette?
In actuality, the overall length of the Corvette was reduced by an impressive 8.8 inches despite a mere 2 inch cut in wheelbase – from 98.0 inches (the C3) to 96.0 inches (the C4 prototype) – with just a 1.7-inch reduction in front overhang.
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What is C4 in AWS?
C4 instances are based on Intel Xeon E5-2666 v3 (codename Haswell) processors that run at a base frequency of 2.9 GHz, and can deliver clock speeds as high as 3.5 GHz with Intel ® Turbo Boost. Each C4 instance type is EBS-optimized by default and at no additional cost.
What is the difference between C4 and C5 class instances?
C4 and C5 instances run on different hardware systems. C4 runs on Haswell chips, while C5 runs on Skylake with the Nitro system. In some situations, such as governmental clouds, all resources have to be vetted and approved. So it's possible that the C4 might be approved while the C5 isn't.
What is T2 large?
large. The t2. large instance is a general purpose instance with 2 vCPUs, 8 GiB of memory.
What are the three types of EC2 instances?
They are On-Demand Instances, Reserved Instances, Spot Instances, and Savings Plans. Amazon also offers the additional option of Amazon EC2 Dedicated Hosts.
What does C4 and C5 stand for?
The cervical spine is made up of 8 cervical vertebrae. The first four vertebrae, starting at the base of the skull and moving down (named C1, C2, C3, and C4) are called the “high cervical spine,” while the lower four (C5, C6, C7, and C8) are the “low cervical spine.”
Is C4 and C5 the same?
This is because envelope sizing is based on the ISO paper size system, so a C5 envelope is designed to fit A5 paper and a C4 envelope is designed to fit A4 paper.
How fast is t2 large?
t2. large, t2. xlarge, and t2. 2xlarge have up to 3.0 GHz Intel Scalable Processor.
How much is t2 large?
Product DetailsNamevCPUsOn-Demand Price/hr*t2.small1$0.023t2.medium2$0.0464t2.large2$0.0928t2.xlarge4$0.18563 more rows
What is difference between T3 large and T3a large?
T3 and T3a instances are pretty similar to each other, except the processor. The T3 instances ses the Skylake processor whereas the T3a instances use the AMD EPYC 7000 series processors.
What are the 3 main storage types in AWS?
What are the types of cloud storage? There are three main cloud storage types: object storage, file storage, and block storage. Each offers its own advantages and has its own use cases.
What is the difference between EC2 and EC2 instance?
The largest difference for EC2 is that it deploys isolated VM instances with auto scaling support, and ECS deploys scalable clusters of managed Docker containers. Enterprises can use ECS to scale web applications, perform batch processing, and run services in a hybrid environment to deliver better services to users.
What are the 3 types of cloud Services AWS has?
Types of Cloud ComputingInfrastructure as a Service (IaaS) ... Platform as a Service (PaaS) ... Software as a Service (SaaS)
What is C5 instance?
C5 instances are the current generation of compute-optimized EC2 instances. When compared to the general-purpose M5 instances, C5 has more compute power, a lower memory/vCPU ratio and a lower price point. For example, the m5. xlarge has four vCPU and 16 GiB of memory for an On-Demand price of $0.192/hr, while the c5.
What is a C5 instance on AWS?
C5 instances are optimized for compute-intensive workloads and deliver cost-effective high performance at a low price per compute ratio. These instances are ideal for high-performance computing (HPC), machine learning, deep inference, distributed analytics, batch processing, and much more.
What does C4 and C5 control?
1. The C4 dermatome covers parts of the neck, shoulders, and upper part of arms. 2. C5 helps control the deltoids (which form the rounded contours of the shoulders) and the biceps (which allow bending of the elbow and rotation of the forearm).
Where is the C4 and C5 located on the spine?
The C3, C4, and C5 vertebrae form the midsection of the cervical spine, near the base of the neck.
What is the advantage of C4?
A major advantage of C-4 is that it can easily be molded into any desired shape to change the direction of the resulting explosion. C4 has high cutting ability. For example, the complete severing of a 14-inch (36 cm) deep I-beam takes between 1.5 and 2 lb (680 and 910 g) of C4 when properly applied in thin sheets.
How much does a C-4 weigh?
The demolition charge M112 is a rectangular block of Composition C-4 about 2 by 1.5 inches (51 mm × 38 mm) and 11 inches (280 mm) long, weighing 1.25 lb (570 g). The M112 is wrapped in a sometimes olive color Mylar -film container with a pressure-sensitive adhesive tape on one surface.
What is PE4 made of?
The newer PE7 consists of 88.0% RDX, 1.0% DMNB taggant and 11.0% of a binder composed of low molecular mass hydroxyl-terminated polybutadiene, along with an antioxidant and an agent preventing hardening of the binder upon prolonged storage. The PE8 consists of 86.5% RDX, 1.0% DMNB taggant and 12.5% of a binder composed of di (2-ethylhexyl) sebacate thickened with high molecular mass polyisobutylene.
What is the compound C-4?
The Composition C-4 used by the United States Armed Forces contains 91% RDX ("Research Department Explosive", an explosive nitroamine ), bound by a mixture of 5.3% dioctyl sebacate (DOS) or dioctyl adipate (DOA) as the plasticizer (to increase the plasticity of the explosive), thickened with 2.1% polyisobutylene (PIB, a synthetic rubber) as the binder, and 1.6% of a mineral oil often called "process oil." Instead of "process oil," low-viscosity motor oil is used in the manufacture of C-4 for civilian use.
How to make C-4?
The manufacturing process for Composition C-4 specifies that wet RDX and plastic binder are added in a stainless steel mixing kettle. This is called the aqueous slurry-coating process. The kettle is tumbled to obtain a homogeneous mixture. This mixture is wet and must be dried after transfer to drying trays. Drying with forced air for 16 hours at 50 °C to 60 °C is recommended to eliminate excess moisture. : 198
What is PE-4 explosive?
A similar British plastic explosive, also based on RDX but with different plasticizer than Composition C-4, is known as PE-4 (Plastic Explosive No. 4).
How is C-4 made?
C-4 is manufactured by combining the above ingredients with binders dissolved in a solvent. Once the ingredients have been mixed, the solvent is extracted through drying and filtering. The final material is a solid with a dirty white to light brown color, a putty-like texture similar to modeling clay, and a distinct smell of motor oil. Depending on its intended usage and on the manufacturer, there are differences in the composition of C-4. For example, a 1990 U.S. Army technical manual stipulated that Class IV composition C-4 consists of 89.9±1% RDX, 10±1% polyisobutylene, and 0.2±0.02% dye that is itself made up of 90% lead chromate and 10% lamp black. RDX classes A, B, E, and H are all suitable for use in C-4. Classes are measured by granulation.
Overview
Characteristics and uses
The Composition C-4 used by the United States Armed Forces contains 91% RDX ("Research Department Explosive", an explosive nitroamine), bound by a mixture of 5.3% dioctyl sebacate (DOS) or dioctyl adipate (DOA) as the plasticizer (to increase the plasticity of the explosive), thickened with 2.1% polyisobutylene (PIB, a synthetic rubber) as the binder, and 1.6% of a mineral oil often called "process oil". Instead of "process oil", low-viscosity motor oil is used in the manufactu…
Development
C-4 is a member of the Composition C family of chemical explosives. Variants have different proportions and plasticisers and include compositions C-2, C-3, and C-4. The original RDX-based material was developed by the British during World War II and redeveloped as Composition C when introduced to the U.S. military. It was replaced by Composition C-2 around 1943 and later redeveloped around 1944 as Composition C-3. The toxicity of C-3 was reduced, the concentratio…
Analysis
C-4 has toxic effects on humans when ingested. Within a few hours multiple generalized seizures, vomiting, and changes in mental activity occur. A strong link to central nervous dysfunction is observed. If ingested, patients may be administered a dose of active charcoal to adsorb some of the toxins, and haloperidol intramuscularly and diazepam intravenously to help the patient control seizures until it has passed. However, ingesting small amounts of C-4 is not known to cause an…
Use
U.S. soldiers during the Vietnam War era would sometimes use small amounts of C-4 as a fuel for heating rations, as it will burn unless detonated with a primary explosive. However, burning C-4 produces poisonous fumes, and soldiers are warned of the dangers of personal injury when using the plastic explosive.
Among field troops in Vietnam it became common knowledge that ingestion of a small amount …
See also
• Bomb
• Composition B
• Fuse
• Polymer-bonded explosive
• ANFO
External links
• HowStuffWorks article Archived
• The Original Anarchist's Cookbook Ch. 137. "Reclamation of RDX from C-4 Explosives" by the Jolly Roger
• Encyclopedia of Explosives and Related Items Volume 3 (Archived)