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Vaccines have nearly eradicated several harmful infectious diseases such as polio, rubella (measles), pertussis (whooping cough), and varicella (chicken pox).
Development labs are working around the clock to come up with a vaccine for the new Covid-19 coronavirus. This serum would contain a dead or weakened version of the disease-causing virus. The vaccination would contain the antigens that belong to the Covid-19 coronavirus without causing the disease symptoms associated with it.
-a) Describe the 3 main steps to the immune reaction in the body after a person has been injected with a vaccine for Covid-19.
-b) What are some of the issues (moral, ethical OR economic) involved when testing out a vaccine developed for a new disease in humans.
A man stands on a frictionless platform that is rotating with an angular speed of 3.3 rad/s; his arms are outstretched and he holds a weight in each hand. what is the resulting angular speed of the platform
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Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.350mm wide. The diffraction pattern is observed on a screen 3m away.
A straightforward method of computing the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder. Find what is the density of a 220 gram rock that displaces 87.0 cm3 of water
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An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 30.0 degrees. What is the pressure in the narrow section of the pipe
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A 3.00 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. What is the mass of the second mud ball
A 21 g bullet travelling at 255 m/s is fired into a 0.452 kg wooden block anchored to a 100 N/m spring. How far is spring compressed to the nearest thousandth of a meter.
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