Questions asked
A certain radio transmitter can emit an electric field intensity of 5 V/m and magnetic field intensity of 0.1 µT at a meter away from the transmitter. If the receiver needs at least 2% of the propagated EM radiation to receive good reception and was located 0.5 km away from the tower, will the receiver get a good reception? Why or why not? Show your solutions.
UV-C is a type of ultraviolet radiation that can effectively eliminate microorganisms, it has a frequency of 1070 THz to 3000 THz. If your UV radiation source has a wavelength of 380 nm, will the radiation be effective as UV-C? Why or why not? Show your solutions.
The osmotic pressure of glucose is 0.412 atm at 30 ℃. What is the concentration of the solution in molarity? ROUND OFF YOUR ANSWER INTO TWO DECIMAL PLACES
The vapor pressure of ethyl alcohol, C2H5OH is 100 mmHg at 30 ℃ . Predict the vapor pressure of the solution of 12 g urea, (NH2)2CO in 60 g ethyl alcohol at 30 ℃. ROUND OFF YOUR ANSWER INTO TWO DECIMAL PLACES
What mass of urea, (NH2)2CO, a nonelectrolyte, must be dissolved in 150 g of water to give a solution with a freezing point of -3.0 ℃ ? ROUND OFF YOUR ANSWERS INTO TWO DECIMAL PLACES
Calculate the molecular weight of a 5-gram nonvolatile nonelectrolyte substance in 175 g chloroform with a boiling point of 62.2 ℃. ROUND OFF YOUR ANSWERS INTO TWO DECIMAL PLACES.
Khoobchandra Agrawal
Numerade educator
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Supratim Pal
What will be the properties of the reflected image? Choose what will be the description of the available options for each property that corresponds to your answer. 1. Image type a. Real b. Virtual 1.1 Image type c. Magnified d. Reduced e. Equal f. No image 1.2 Image type g. Upright h. Inverted i. No image