Standard temperature is equal to 0 °C<span>, which is 273.15 K. Standard Pressure is </span>1 Atm<span>, 101.3kPa or </span>760 mmHg<span> or torr. STP is often used for measuring gas density and volume. At STP 1 mole of any gas occupies 22.4L.
Hope this helps. :)</span>
Answer: It doesn’t function without a source of current
Explanation:
In an electromagnet, the magnetic field is generated by an electric current in a coil of wire which reinforces an iron core. But when the electric current applied on the mentioned core is disconnected, it immediately loses its magnetization. This also means that the intensity of the magnetic field can be controlled (increased or decreased) by changing the intensity of the electric current flowing through the nucleus.
That is why an electromagnet does not work without electric current.
CO2 and N2O keep the energy that gets to Earth from the sun inside the atmosphere. Without greenhouse gases, our planet would be too cold. But due to the recent increase in greenhouse gases, more energy released from the sun is contained in the Earth, heating it up.
The superior and inferior vena cava are the two main blood vessels that bring de-oxygentated blood back to the heart after the blood's done a circuit of the body to offload its oxygen to organs and muscles and tissues and cells, etc. The blood from these vessels enters the right atrium of the heart. Once the atrium is full of blood it contracts, pushing the blood through the open tricuspid valve into the right ventricle of the heart. The tricuspid valve closes shut once the blood is in the right ventricle, preventing the blood from returning to the right atrium. While the valve is closed, the ventricle contracts, pushing the blood out of the heart through the pulmonic valve, into the pulmonary artery, where it is carried directly to the lungs where it gets a new supply of oxygen attached to it. The freshly oxygenated blood courses along the pulmonary vein from the lungs back to the heart, entering the heart's left atrium. When the left atrium is full of blood, it empties by contraction, through the open mitral valve, into the left ventricle of the heart. The mitral valve then closes, so the blood cannot retrace its path. The left ventricle then contracts, pushing the blood out of the heart through the aortic valve into the big blood vessel called the aorta, from where it courses round the body delivering oxygen again.
All waves have the same wavelength.
FALSE
All waves may not be of same frequency because all waves are of different energy levels and energy depends on the frequency which is different.
Radio telescopes give us information about the birthplace of a star.
FALSE
Radio telescope is an astronomical instrument consisting of a radio receiver and an antenna system that is used to detect radio-frequency radiation emitted by extraterrestrial sources.
If the wavelength of a wave increases, its frequency also increases.
FALSE
relation between frequency and wavelength is given as
so they are inversely related to each other and hence if wavelength is increased then frequency must have to decrease.
Visible light is a kind of electromagnetic wave.
TRUE
All visible light is a part of electromagnetic waves.
All objects emit electromagnetic waves.
TRUE
Due to thermal vibrations all objects radiate electromagnetic waves of different frequencies.