Physics, 05.05.2020 00:41 theyenvylexii
Light enters a Newtonian reflection telescope and hits a mirror inside the telescope to redirect the light to the eyepiece. The light strikes the mirror at an angle of 45 degrees. What angle is it reflected back off the mirror towards the eyepiece?
A) 15 degrees
B) 45 degrees
C) 90 degrees
D) 180 degrees
Answers: 3
Physics, 21.06.2019 16:30
The mass of a muon is 207 times the electron mass; the average lifetime of muons at rest is 2.21 μs. in a certain experiment, muons moving through a laboratory are measured to have an average lifetime of 7.04 μs. for the moving muons, what are (a) β (b) k, and (c) p? the rest energy of the electron is 0.511 mev.
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Physics, 21.06.2019 21:50
What is the length x of the side of the triangle below? (hint: use the cosine function)
Answers: 1
Physics, 22.06.2019 00:10
The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?
Answers: 3
Physics, 22.06.2019 09:30
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
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