Answer:
The resistance of the tungsten coil at 80 degrees Celsius is 15.12 ohm
Explanation:
The given parameters are;
The resistance of the tungsten coil at 15 degrees Celsius = 12 ohm
The temperature coefficient of resistance of tungsten = 0.004/°C
The resistance of the tungsten coil at 80 degrees Celsius is found using the following relation;
R₂ = R₁·[1 + α·(t₂ - t₁)]
Where;
R₁ = The resistance at the initial temperature = 12 ohm
R₂ = The resistance of tungsten at the final temperature
t₁ = The initial temperature = 15 degrees Celsius
t₂ = The final temperature = 80 degrees Celsius
α = temperature coefficient of resistance of tungsten = 0.004/°C
Therefore, we have;
R₂ = 12×[1 + 0.004×(80 - 15)] = 15.12 ohm
The resistance of the tungsten coil at 80 degrees Celsius = 15.12 ohm.
B. compound
C. composite
D. mixture
Answer:
A. element
Explanation:
A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.
energy.
Calculate the original kinetic energy of the electron. [Show all work, including the equation and
substitution with units.]
K.E =2.85 × 10⁻¹⁸ Joules.
K.E = 1/2 mv²
Mass of an electron = 9.11 × 10⁻³¹ Kg, velocity of the electron =2.5×10⁶ m/s
Thus, K.E = 1/2 (9.11 × 10⁻³¹ Kg) (2.5 × 10⁶ m/s)²
= 2.85 × 10⁻¹⁸ Joules.
The original kinetic energy of this electron is equal to 2.85 × 10⁻¹⁸ Joules.
Given the following data:
Scientific data:
Mathematically, kinetic energy can be calculated by using this formula:
K.E = 1/2 × mv²
Where:
Substituting the given parameters into the formula, we have;
K.E = 1/2 × 9.11 × 10⁻³¹ × (2.5 × 10⁶ m/s)²
K.E = 2.85 × 10⁻¹⁸ Joules.
Read more on kinetic energy here: brainly.com/question/1242059
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waves in the ocean
waves in a wheat field
light
Answer:
The other person who answered is incorrect- the real answer is light.
Explanation:
A mechanical wave is a wave that requires a medium. A medium is any substance that has a defined set of physical properties and can transmit energy. A medium can be a solid, liquid, or gas. Some examples of a medium include an iron bar, the ground, water, lava, air, and helium in a balloon.
The answer is not sound because sound travels through waves through the air. If you were to put a source of sound in a container that contains no air, you would not be able to hear the sound through the container. Since sound has a wave and a medium, it is a mechanical wave.
The answer is not waves in the ocean because, obviously, this is a wave. Its medium is the water. Since it has a wave and a medium, it is a mechanical wave.
The answer is not waves in a wheat field because, again, this is a wave. The medium is the air. Since it has a wave and a medium, it is a mechanical wave.
The answer is light. Light travels through electromagnetic waves. However, it does not require a medium. Light can travel not only through air and solid materials, but also through the vacuum of space. Since light does not require a medium, it is not a mechanical wave.
I hope this helps !! :)
ocean waves because its not artificial
a. Technician A
b. Technician B
c. Both Technicians
d. Neither Technician
Answer:
c. Both Technicians
Explanation:
A steering wheel position sensor is being discussed. Technician A says that the sensor is used to determine the direction of the steering wheel. Technician B says that the sensor detects how fast the steering wheel is turned. the following are used to sense
Hall-effect, Photo cell, Potentiometer are used on vehicles equipped with an electronically controlled suspension
sensors are like indicators in a vehicle to give signals for both direction and the speed of the vehicle
c. Both Technicians
2. The motion of freely falling body is an example of ----- motion.
a) Uniform motion b) Non -uniform motion c) Uniformly accelerated motion. d) None of these.
Answer:
A
Explanation:
acceleration is defined as the rate of change of velocity with time