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natta225 [31]
3 years ago
12

Explain the expression “light travels at a speed”.

Physics
1 answer:
Anestetic [448]3 years ago
7 0
Some things travel faster than the speed of light
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Help me!!!!!!!!!!!!!!!!!!!
nignag [31]
Understanding with the help of a peer
3 0
4 years ago
Eight 7.0W Christmas tree lights are strung in series to a 110 V light source. What is the resistance of each bulb?
Evgesh-ka [11]

Answer:

Resistance = 1728.57 Ohms

Explanation:

Given the following data;

Power = 7 Watts

Voltage = 110 Volts

To find the resistance of each bulb;

Mathematically, power can be calculated using the formula;

Power = \frac {Voltage^{2}}{resistance}

Making resistance the subject of formula, we have;

Resistance = \frac {Voltage^{2}}{power}

Substituting into the formula, we have;

Resistance = \frac {110^{2}}{7}

Resistance = \frac {12100}{7}

Resistance = 1728.57 Ohms

8 0
3 years ago
Which wave on the EMR spectrum has the longest wavelength?
Alik [6]

Answer:

Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation. Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

5 0
3 years ago
What's nanotechnology?​
pshichka [43]

Answer:

Nanotechnology is the term given to those areas of science and engineering where phenomena that take place at dimensions in the nanometre scale are utilised in the design, characterisation, production and application of materials, structures, devices and systems.

6 0
3 years ago
Read 2 more answers
Consider a very low (zero) friction, 5.0 kg skateboard on a ramp at an angle of 15 degrees to the horizontal. What would be the
malfutka [58]
You need to use trigonometry to work this one out. The components of the force are needed. it is a vector, so work out the unbalanced force using trig. you know that the force pulling the 5kg skateboard down is going to be 9.8 * 5 = 49N. As you have the angle it is on, and 49 is the vertical component, you can use Sin(X) = Op/Hyp where x= 15 degress, the opposite is the vertical component (49N) and the hyp is the unbalanced force - which is 79.35. I think. Somebody plz double check me on that one though :P
8 0
3 years ago
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