How many circulatory systems are there? The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells. What is […]
What is the effect of increased temperature on the pressure of air answer?
What is the effect of increased temperature on the pressure of air answer? This can be easily understood by visualising the particles of gas in the container moving with a greater energy when the temperature is increased. This means that they have more collisions with each other and the sides of the container and hence […]
What is a homogeneous market?
What is a homogeneous market? A homogeneous market is a type of marketplace in which each of the products traded in that market are more or less the same, although there may be some minor differences in design. Markets that can be classed as homogeneous involve the sale of all sorts of products. What are […]
What type of electromagnetic is used in radar?
What type of electromagnetic is used in radar? radio waves Why radio waves are used in radar? RADAR is fundamentally an electromagnetic sensor used to detect and locate objects. Radio waves are radiated out from the radar into free space. Some of the radio waves will be intercepted by reflecting objects (targets). The intercepted radio […]
Where is most freshwater on Earth Found?
What are the negative effects of rock cycles?
What are the negative effects of rock cycles? Rock cycles also affects humans as it may cause volcanic eruptions and earthquakes. How does the rock cycle affect humans? Humans interact with the rock cycle by mining rocks for useful minerals such as gold and for fuel such as coal, oil and gas. Metals are found […]
Is natural gas a popular source of electricity?
Is natural gas a popular source of electricity? Fossil fuels are the largest sources of energy for electricity generation. Natural gas was the largest source—about 40%—of U.S. electricity generation in 2020. Natural gas is used in steam turbines and gas turbines to generate electricity. Nearly all coal-fired power plants use steam turbines. How long does […]
What wind speed is a gale?
What are some examples of selectively permeable materials?
What are some examples of selectively permeable materials? Examples of selectively permeable materials or items are; Vacuum filter- it traps dust but allows air through. Coffee filter- allows water to pass through, but does not allow the coffee grounds. Colander -used to strain liquid food from foods. it drains water but is not permeable to […]
How much does a tennis ball boy make?
How much does a tennis ball boy make? Ball Boy Salary Annual Salary Hourly Wage Top Earners $53,500 $26 75th Percentile $41,000 $20 Average $36,345 $17 25th Percentile $23,000 $11 What does Wimbledon do with the old tennis balls? The used balls are sold for charity. This means that the money raised by selling the […]