Recent activity by LandonHorn67

1 answer 4 views

How does the chemical composition of glasses impact their optical properties and what factors must be considered when selecting glasses for use in specific optical applications (such as lenses, prisms or optical fibers)?

answered 3 days ago in Materials Chemistry

1 answer 35 views

How can the photochemical properties of supramolecular assemblies be manipulated by varying the composition of the assembly?

answered Feb 10 in PhotoChemistry

1 answer 95 views

Design a heat exchanger to cool down a mixture of water and ethylene glycol from 80°C to 20°C using cooling water from a nearby lake that enters at 15°C. The mixture flow rate is 10 L/min, and the desired outlet temperature is 20°C. The heat transfer coefficient for the heat exchanger is 250 W/(m².K) and the overall heat transfer coefficient is to be assumed as 350 W/(m².K). The heat capacity of the mixture is 3.8 kJ/(kg.K) and the density is 1030 kg/m³. Determine: a) the surface area of the heat exchanger required for this process,b) the volume flow rate of cooling water required, and c) the overall heat transfer rate in kW.

asked Jan 30 in Chemical engineering

1 answer 57 views

Calculate the enthalpy change of dissolution when 5 grams of sodium chloride (NaCl) dissolves in 100 mL of water at 25°C. The molar enthalpy of dissolution of sodium chloride is -3.9 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 60 views

How does attention impact learning in individuals with Attention Deficit Hyperactivity Disorder ADHD ?

answered Jan 17 in Psychology

1 answer 30 views

What is a Type II error in hypothesis testing?

asked Jan 16 in Psychology

1 answer 24 views

Please compare and contrast the cognitive and humanistic approaches to therapy.

asked Jan 15 in Psychology

1 answer 10 views

Please compare the multiple intelligences theory and the triarchic theory of intelligence.

asked Jan 15 in Psychology

1 answer 36 views

What is the Gestalt principle of similarity?

answered Jan 14 in Psychology

1 answer 56 views

What secures teeth in the mouth?

asked Jan 7 in Science

1 answer 11 views

One of the early signs of cell disease is this "leaking" of what into the body cells?

asked Dec 31, 2024 in Science

1 answer 39 views

Obligate anaerobes live and grow in the absence of what?

asked Dec 31, 2024 in Science

1 answer 34 views

Echinoderms have a unique system for gas exchange, nutrient circulation, and locomotion called the water vascular system. the system consists of a central ring canal and radial canals extending along each arm. water circulates through these structures allowing for gas, nutrient, and this?

asked Dec 30, 2024 in Science

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