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Bookmark or Share- How do you find Tan^-1(-1) without a calculator? - SocraticThe answer is -pi/4 Alright, archtan / tan^-1(x) is the inverse of tangent. Tan is sin/cos. Like the inverse of sin, the inverse of tan is also restricted to quadrants 1 and 4. Knowing this we are solving for the inverse of tan -1. We are basically being asked the question what angle/radian does tan(-1) equal. Using the unit circle we can see that tan(1)= pi/4. Since the "Odds and Evens ...
- How do you calculate the number of photons? + Example - SocraticEXAMPLE. A common laser pointer produces 1.0 mW at a wavelength of 670 nm. Calculate the number of photons produced per millisecond. Solution. Step 1. Calculate the energy of a photon. E = hc λ = 6.626 × 1034J⋅s ×2.998 × 108m⋅s−1 670 × 10−9m = 2.965 ×10−19J. ( 3 significant figures + 1 guard digit) Step 2.
- Calculations with wavelength and frequency - ChemistryA #200 W# power source emits monochromatic light of wavelength #4950 Angstrom#. How many photons per minute are emitted by the source? [Given: #h = 6.6 xx 10^-34 Js#]
- What SI units are used to measure power? - SocraticThe SI unit for power is the watt. > The watt (W) is the SI derived unit for power. It comes from the SI base units. Velocity is the rate at which an object travels. v = "distance"/"time" = d/t. The units of velocity are metres per second (m/s). Acceleration is the rate at which an object changes its velocity. a = v/t. The units of acceleration are metres per second squared ("m·s"^"-2 ...
- How are force and power related? - SocraticWork is force through a distance. In this way, power and force can be related. Power is work per unit time: ⇒ P = W Δt. Work is force through a distance: ⇒ W = F Δx. Hence: ⇒ P = F Δx Δt. Answer link.
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