If a star is moving away from an observer, the observed shift in the wavelength of its light is called?
- Blueshift
- Redshift
- Greenshift
- Yellowshift
If the capacitance C and resistance R of an RC circuit are given, what is the time constant (τ) of the circuit?
- τ=R+C
- τ=R−C
- τ=RC
- τ= R/C
The product of resistance (R) and capacitance (C), denoted as RC, has dimensions of?
- Voltage
- Current
- Charge
- Time
If light strikes the surface of glass with the equation r=r0 sin(ωt), the equation after reflection will be?
- r=r0 cos(ωt)
- r=r0 sin(ωt)
- r=r0 tan(ωt)
- r=r0 sec(ωt)
What is the purpose of using an umbrella in the rain?
- To make the rain heavier
- To make the rain lighter
- To protect oneself from getting wet
- To attract more rain
If there are 25 waves in a 5-second time period, what is the frequency of the waves?
- 1 Hz
- 5 Hz
- 10 Hz
- 25 Hz
How is the angle made by a vector with the x-axis typically denoted?
- α
- β
- θ
- ϕ
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