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- Question
Which of these is not a simple machine?
Options- A. a pair of scissors
- B. a lever
- C. a ramp
- D. the pulley
- Correct Answer
- a pair of scissors
ExplanationAny of the basic mechanical devices for applying a force are called simple machines.
There are 6 basic simple machines; the lever, the wheel and axle, the inclined plane, the wedge, the pulley, and the screw. Several of these simple machines are related to each other. But, each has a specific purpose in the world of doing work.
- 1. Sources of geothermal power are
Options- A. water
- B. earth's heat
- C. Both A & B
- D. None of the above Discuss
- 2. what is the source of energy for the water cycle?
Options- A. Rain water
- B. Sun
- C. Clouds
- D. Animals Discuss
- 3. Which alternative energy source is exhaustible?
Options- A. tidal energy
- B. wind energy
- C. solar energy
- D. geothermal energy Discuss
- 4. Which method of expressing direction is indicated in the illustration?
Options- A. Section
- B. Interjuction
- C. Intersection
- D. None of the above Discuss
- 5. Which results in an increase in power?
Options- A. doing more work in less time.
- B. doing less work in more time.
- C. doing less work in less time.
- D. doing more work in more time. Discuss
- 6. Which of the following definitions describes a physical hazard?
Options- A. The most commonly thought of hazard in construction. This hazard includes radiation, extreme temperatures, noise, and vibration.
- B. These hazards can lead to injuries to the joints or muscles by way of heavy, frequent lifting, repetitive tasks.
- C. Can be present in dust, fumes, liquids, solids, mists, vapors, or gases of products used at a site or released during a construction job
- D. Microorganisms, such as bacteria, fungus, mold, or viruses that can cause illness. Discuss
- 7. The stability triangle is used to describe Discuss
- 8. Materials that usually are good conductors of electricity?
Options- A. Aluminium
- B. Lead
- C. Nickel
- D. Wood Discuss
- 9. When does land breeze occur?
Options- A. Fall
- B. Winter
- C. Both A & B
- D. Hot summer Discuss
- 10. The composition of electrician solder is
Options- A. lead-37%, tin-63%
- B. Iron-37%, tin-63%
- C. lead-37%, Steel-63%
- D. Steel-37%, copper-63% Discuss
Physics problems
Search Results
Correct Answer: Both A & B
Correct Answer: Sun
Correct Answer: geothermal energy
Explanation:
Based on conventionality in deriving energy, energy sources could be classified as
Conventional ::
coal, oil, hydro, nuclear, etc... sources which can be used up or exhaustible.
(and)
Non - conventional ::
solar, wind, tidal, geothermal, biogas, etc... sources which are not exhausted.
Among the given options, Geothermal energy is the alternative energy source among all the choices that are given in the question, that is exhaustible.
Correct Answer: Intersection
Correct Answer: doing more work in less time.
Explanation:
Doing more work in less time, results in an increase in power to do a work.
Correct Answer: The most commonly thought of hazard in construction. This hazard includes radiation, extreme temperatures, noise, and vibration.
Explanation:
A physical hazard is defined as "A factor within the environment that can harm the body without necessarily touching it."
Vibration and noise are examples of physical hazards.
Physical hazards include but aren't limited to electricity, radiation, pressure, noise, heights and vibration amongst many others.
Correct Answer: The stability triangle is used to describe the movement of center of gravity of a load vehicle like trucks If the load is not balanced then it moves and may tip over it If you were to raise a lift truck up and look at its underside, you would see that the support points for the truck are located at points A, B, and C The triangle formed between points A, B, and C is called the Stability Triangle The lift truck will not tip over as long as the center of gravity remains inside the triangle The center of gravity is the point within a lift truck where there is equal weight all around it
Correct Answer: Aluminium
Explanation:
Materials that usually allow electricity to pass through them are called Good conductors of electricity.
Conductors conduct electrical current very easily because of their free electrons.
Examples are :: Aluminium, Gold, Copper, Silver
Materials that do not allow or oppose electrical current & make poor conductors are called Insulators.
Examples are :: Glass, Plastic, Wood, Air,...
Correct Answer: Both A & B
Explanation:
Land breezes are more common during winter and fall season. It occurs as it becomes night, the air on the land colls fast and air on the water surface are warmth than that and begin to rise.
Correct Answer: lead-37%, tin-63%
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