Answer:
First let's find the work.
Work = Force*Displacement
= 20*5
= 100 Joules
Power = Work/Time
= 100/4
= 25 Watts
Answer:
Polarized glasses contains a special filter that block dangerous intensity of lights which are reflected by flat surfaces and they help in reducing glare and discomfort
Explanation:
Sunlight scatters in all the direction. But when this light strikes with the flat surfaces, then the light which is reflected by the flat surface tend to become polarized, means the reflected light will travel in all directions. This reflecting light creates a dangerous intense light that causes glare and reduces visibility.
Polarized glasses contains a special filter that block this type of dangerous intensity lights, help in reducing glare and discomfort.
Therefore, by the above discussion it can be say that the polarized sunglasses particularly effective in reducing glares.
Answer:
If we increase the temperature in a reactor by 54 degrees Fahrenheit [54°F], the temperature will increase by 12.22 degrees Celsius [12.22 ⁰C]
Explanation:
To determine the number of degrees Celsius the temperature will be increased, we convert from Fahrenheit to Celsius.
Converting from Fahrenheit to degree Celsius
54°F -----> °C
54 = 1.8°C + 32
54-32 = 1.8°C
22 = 1.8°C
°C = 22/1.8
= 12.22 °C
Thus, 54°F -----> 12.22 °C
Therefore, If we increase the temperature in a reactor by 54degrees Fahrenheit [54°F], the temperature will increase by 12.22 degrees Celsius [12.22 ⁰C]
Answer:
10cm^3
Explanation:
Given data
Mass of steel = 80grams
density of steel= 8 g/cm^3
We know that the formula for density is given as
density= mass/volume
make volume subject of formula
volume= mass/density
volume=80/8
volume= 10cm^3
Hence, the volume 10cm^3
Answer:
the pressure at the bottom is approximately 103264 Pa
Explanation:
From Pascal's law, the pressure at the bottom of the container is the pressure from the atmosphere and the columns of water and olive , therefore
Pressure at the bottom = Pressure at the surface of the liquid ( atmospheric pressure) + pressure of the column of water + pressure of the column of olive oil
since
- Pressure at the surface of the liquid = atmospheric pressure = 101325 Pa
- pressure of the column of water = density of water * gravity * level of water
= 1000 kg/m³ * 9.8 m/s² * 0.12 m = 1176 Pa
- pressure of the column of olive oil= density of olive oil* gravity * level of olive oil = 916 kg/m³ * 9.8 m/s² * 0.085 m = 763 Pa
therefore
Pressure at the bottom = 101325 Pa + 1176 Pa + 763 Pa = 103264 Pa
density of olive oil was taken from internet sources ( we can check that is lower than the one of water, and thus it floats )
