Answer: sac
Tunicates are sea squirts that are found in the marine water. These animals remains attached to the rocks and the sea beds. They exhibit a body shape which looks like a barrel. The barrel has two openings called as siphons. These siphon helps in the intake of the food particles and oxygen. These animals look like sac on the sea floor.
convection
radiation
all of the above
Answer:
radiation is the answer
b. chemical reactions
c. resistance
d. the movement of electric charge
Answer:
d. the movement of electric charge
Explanation:
Voltage source is used to provide constant voltage difference across the ends of a given conductor where it is connected
Now when voltage source is connected across the conductor we can say that due to constant voltage difference there would be a constant current will maintain in the conductor
It is given by
now since the voltage difference and resistance both are constant so current will be same in the circuit
So here the flow of charge will remain constant due to voltage source
So correct answer would be
d. the movement of electric charge
Answer:
insulation
Explanation:
Conductivity represents the degree of ease through which heat is transmitted through a material.
Any substance that has a high conductivity i.e., can pass heat easily is called a conductor of heat.
Any substance that has a low conductivity i.e., cannot pass heat easily is called a insulator of heat.
Air does not conduct heat well. So, it acts an insulator and traps heat.
Answer: The correct answer is electromagnetic wave.
Explanation:
In the electromagnetic wave, both magnetic field and electric field are perpendiculars each other to the direction of the motion of the wave.
Electromagnetic spectrum is the range of frequencies of electromagnetic radiations.
Microwave is an electromagnetic wave. It falls in the range of electromagnetic spectrum between radio and infrared rays. It is a high bandwidth communication. It is used in RADAR and for heating purpose in microwave oven. Its frequency range lies between 300 MHz and 300 GHz.
Therefore, microwave is the type of electromagnetic wave.