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KonstantinChe [14]
4 years ago
8

An engineer discovered that a TV set was receiving too much voltage to work properly.Which of the following circuit parts should

the engineer add to make the TV set work properly?
A.Switch 
B.Insulator 
C.Resistor 
D.Conductor
Physics
1 answer:
Lana71 [14]4 years ago
8 0
The answer would be c. a resistor because resistors are made to drop the voltage
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The acceleration used for the height is 9.81 m/s2 because it is the acceleration due to gravity. (true or false)
Yuliya22 [10]

Answer:

true

Explanation:

Gravity (or the acceleration due to gravity) is 9.81 meters per second squared, on the surface of Earth, because of the size of Earth and the distance we are on its surface from its center.

4 0
3 years ago
All of the following are examples of physical properties except which one?
Thepotemich [5.8K]

Answer:

the answer is c

Explanation:

melting = become liquefied by heat

solubility = a new bond formation

conductivity = electric transmitter

flammability = burnable

8 0
3 years ago
A mass of 0.273 kg is placed on an incline of 38.382 degrees. It is attached by a rope over a pulley to a mass of 0.254 kg. Find
Natali5045456 [20]

here tension in the string is counter balanced by weight of block of mass m1

so we can say

T = m_1g

T = 0.254 \times 9.8 = 2.49 N

now on the other side the block which is placed on the inclined plane

we can say that component of weight of the block and friction force is counter balanced by tension force

m_2g sin\theta + F_f = T

now we can plug in all values to find the friction force

0.273 \times 9.8 sin38.382 + F_f = 2.49

1.66 + F_f = 2.49

F_f = 0.83 N

so it will have 0.83 N force on it due to friction

now to find the friction coefficient

F_f = \mu \times F_n

here we know that

F_n = m_2gcos\theta

F_n = 0.273 \times 9.8 \times cos38.382 = 2.1 N

now from above equation

0.83 = \mu \times 2.1

\mu = 0.38

so friction coefficient will be 0.38

8 0
3 years ago
Give an example of a mixture that contains more than one state of matter
grigory [225]
GEL IT IS COMBINATION OF SOLID AND LIQUID
3 0
3 years ago
1. This heating system maintains room temperature at or near a particular value, known as the .
stiv31 [10]

Answer:

Explanation:

1. This heating system maintains room temperature at or near a particular value, known as the set point.

A temperature setpoint is the level at which the body attempts to maintain its temperature. When the setpoint is raised, the result is a fever.

2. You open the window, and a blast of icy air enters the room. The temperature drops to 17 degrees Celsius, which acts as a STIMULUS to the heating system.

3. The thermostat is a SENSOR that detects the stimulus and triggers a response.

Thermostat is use to turn off or on a switch, when the temperature is high or low

4. The heater turns on, and the temperature in the room INCREASE until it returns to the original setting.

This is the work of the thermostat above, when the temperature of the room is below a certain temperature the thermostat triggered the switch and keep increasing the temperature of the room until normal setting.

5. The response of the heating system reduces the stimulus. This is an example of NEGATIVE feedback.

Body temperature is regulated by negative feedback. The stimulus is when the body temperature exceeds 37 degrees Celsius, the sensors are the nerve cells with endings in the skin and brain, the control is the temperature regulatory center in the brain, and the effector is the sweat glands throughout the body.

6. The way this heating system maintains a stable room temperature is similar to the way an animal's body controls many aspects of its internal environment. The maintenance of a relatively constant internal environment is known as HOMEOSTASIS.

Humans rely on homeostasis to keep their core temperature hovering around 98.6 degrees Fahrenheit, so that their bodies can maintain proper function. Homeostasis is the ability to maintain a relatively stable internal state that persists despite changes in the world outside.

5 0
4 years ago
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