Answer:
violet region (UV) is wavelength less than 400 nm, the most common is between 200 and 400 nm,
The infrared (IR) range wavelengths greater than 700 nm
Explanation:
The spectral region near the visible is what humans can see with our eyes.
The range of the ultra violet region (UV) is wavelength less than 400 nm, the most common is between 200 and 400 nm, this radiation is responsible for tanning and skin burns.
The infrared (IR) range is a very wide range that begins at wavelengths greater than 700 nm and continues up to approximately 25,000 nm (1012 Hz).
Answer:
The current is 7.87 A.
Explanation:
Given that,
Length = 0.250 m
Magnetic field 
Magnetic force = 0.120 N
We need to calculate the current
Using formula of magnetic force
Where, B = magnetic field
I = current
l = length
F = force
Put the value into the formula
Hence, The current is 7.87 A.
Answer:
True: The stored energy in organic matter or wastes is called biomass energy and when burned can be used to produce thermal energy used for cooking, heating homes or generating electricity.
Explanation:
For Household Needs, biomass is utilized for home heating or for cooking purposes. In that case the most common source for fuel is wood, but there are also other substances are used. Latest wood-stoves designs are made in an effective way for heating and cooking needs. With the help of those new technologies fuel consumption is decreased to a significant amount.
Humans have been using biomass energy since ages for cooking their food and heating homes by burning woods. Biomass energy can be used in homes for heating or cooking or in industries large power plants to produce electricity
What is Biomass Energy? Biomass consists of energy in stored form taken from the sun. In photosynthesis plants take energy from sun. By burning biomass the energy emitted in result can be used for heating purposes. There are many types of biomass energy made by either burning or by converting it into liquids or gas, called Bio-fuels and Bio-gas.
Summary:
No doubt Biomass contribute in air pollution formation but it is less than the pollution caused by certain gases and fossils fuels which produce sulfur resulting in acidic rain and polluting our environment.
Radiator. A radiator puts warm air out at the top and draws in cooler air at the bottom. steaming cup of hot tea - The steam you see when drinking a cup of hot tea indicates that heat is being transferred into the air. ice melting/Ice melts because heat moves to the ice from the air
The strength of the electromagnet will be increased with increase in the voltage of the battery and increase in the number of turns of the coil.
Answer: Option C
<u>Explanation:
</u>
An electromagnet is generated by passing current through a magnetic material. As per Faraday’s law, magnetic field will be maintained till there is presence of electric flux in the circuit. Thus, like a solenoid, the number of turns of the copper wire on the iron nail will be directly proportional to the strength of the electromagnet.
This is because each turn of the copper wire will act a small region of electromagnet which when added up will lead to increase in the strength of the electromagnet. Similarly, the electromagnet's strength will also increase when the current flowing in the solenoid is increased.
As the current flow in a circuit is proportional to the battery's voltage used, the increase in the voltage will lead to increase in the flow of current in the solenoid structure. Thus, the increase in voltage as well as the coil's turn number leads to increase in the electromagnet's strength.
