Amotorcycle has a magnet attached to the rim of its front wheel. the front tire has a diameter of 60 cm. a magnetic pickup is attached to the front forks and receives an electronic pulse each time the magnet passes by. how far has the motorcycle traveled when the pickup has received 10 pulses?

There is a theory that indicates that dinosaurs became extinct when about 65 million years ago, a large asteroid hit the earth surface. dust caused by this collision blocked the sunlight reaching the earth's surface and many forms of life became extinct due to the cold. fearing this threat, how large the radius of an asteroid should you be looking for if the dangerous asteroid size is approximately the same as the one that killed the dinosaurs? available data suggests that about 18% of that asteroid's mass ended up as a dust spread evenly over earth after eventually settling out of the upper atmosphere. about 0.0180 g/cm^2 of dust, which is chemically different than the earth's rock, covered the earth's surface. typical asteroids have a density of about 1.9 g/cm^3. now that we know the size of the asteroid, how much energy was released during impact, assuming all of it was just the kinetic energy of the asteroid right before the impact?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

What does the law of conservation of mass state?