Why is our weight in kg? Weight, instead, corresponds to the resultant force of the action exerted by gravity of the Earth (in our case) on the mass of a body, and its measuring unit is Newton (N) at the ISU. Thereby, weight of an object becomes mass in an easy way. And that’s how […]
How can you tell if a stain is sperm?
How can you tell if a stain is sperm? Criminal investigators use black lights to detect semen because they’re portable and easy to use. Semen stains can also be detected by sight, by touch (feeling for crusty residue or crunchiness in fabrics), and chemical testing, but UV is rapid and hands-off. What color is a […]
How long does the flu shot last 2020?
How long does the flu shot last 2020? The effects of the vaccine generally only last through one flu season, which is about six months long. That’s part of the reason you need one every year. Starting two weeks after you get a flu shot, you should be protected from certain influenza viruses for the […]
What kind of motion happens during a roller coaster ride?
What kind of motion happens during a roller coaster ride? kinetic energy Why do I pass out on roller coasters? Neurologists say that passing out on roller coasters can happen because the g-force of the ride can briefly deprive the brain of blood and oxygen. Some riders can also experience what’s known as “redouts,” the […]
Why Aluminium reacts with dilute hydrochloric acid slowly in the beginning?
Why Aluminium reacts with dilute hydrochloric acid slowly in the beginning? Answer. \(Al\) metal reacts with dilute \(HCl\) slowly in the beginning due to the presence of a tough protective layer of aluminium oxide on its surface. What takes food coloring out of water? Mix one tablespoon of liquid dishwashing detergent and one tablespoon of […]
Which one is the best way to determine whether an unknown sample is a substance?
Which one is the best way to determine whether an unknown sample is a substance? Answer: C. observing its physical appearance. What is the unknown sample made of? The unknown substance is made up titanium. What is the physical appearance of a substance? Physical properties can be observed or measured without changing the composition of […]
Which is always true for a spontaneous process?
Which is always true for a spontaneous process? ΔG<0 is always true for spontaneous process. Which of the following is not a property of spontaneous process? Therefore, flow of heat from a cold body to a hot body is a non-spontaneous process as it requires external work as per Clausius. Which of the following factor […]
What causes a hypothesis to be rejected?
Can the angle between two vectors be undefined?
What does magnesium and hydrochloric acid make?
What does magnesium and hydrochloric acid make? Adding magnesium metal to hydrochloric acid produces hydrogen gas. The magnesium dissolves to form magnesium chloride, MgCl2. Let’s write a balanced equation for this reaction. Why does magnesium react with hydrochloric acid but not copper? The metals below hydrogen do not react with dilute acids. Because they are […]