IdeasCuriosas - Every Question Deserves an Answer Logo

Questions in physics

[Answered] Select the correct answer. A water pump with a power of $3.4 \times 10^2$ watts lifts water at the rate of $7.5 \times 10^{-2}$ meters/second from a water tank. What is the force exerted by the pump on the water? A. $1.5 \times 10^3$ newtons B. $2.2 \times 10^3$ newtons C. $4.5 \times 10^3$ newtons D. $5.4 \times 10^3$ newtons

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Which of the following electrical industry pioneers invented the first practical AC motor? A. George Westinghouse B. Nikola Tesla C. Thomas Edison D. Zenobe Gramme

[Answered] In which direction does the electric field point at a position directly above a negative charge? A. West B. East C. North D. South

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Which best defines the relationship between speed and velocity? A. Speed is velocity with displacement. B. Velocity is speed with displacement. C. Speed is based on a specific direction. D. Velocity is based on distance.

[Answered] Statements about Light (6 items) (Drag and drop into the appropriate area below) Infrared has higher wavelength than red. If frequency goes up, so does wavelength. If wavelength goes up, frequency drops. As wavelength drops, so does frequency. If frequency goes up, wavelength drops. Infrared has higher frequency than red. Truth of Statement True False

[Answered] 60. What is the speed of light in a vacuum? a. 300,000 km/s b. 3,000,000 km/s c. 3x10 m/s d. 3x10 m/s 61. Which of the following types of waves require a medium to travel? a. Light waves b. Sound waves c. Radio waves d. X-ray 62. __________ is the term for binding of light as it passes one medium to another. a. Reflection b. Refraction c. Diffraction d. Total internal reflection 63. __________ is the unit of measurement for force. a. Neuton (N) b. Joule (J) c. Kilogram (kg) d. Meter (m) 64. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to a. exert force on the ball b. increase force of ball on hands c. increase energy to hit ball d. decrease the rate of change of momentum 65. Which of the following is an example of a vector quantity? a. Mass b. Speed c. Velocity d. Time 66. Choose the best option that will help the nation to control global warming. a. Burning of fuel b. Forestation c. Urbanization d. Increasing human population 67. Two bar magnets are placed near each other such that the north seeking poles of both magnets are beside each other. Also two bar magnets near each other so as to have north seeking pole of one beside the south seeking pole of each other. The observation shows that a north-north seeking pole attract b. north-north seeking pole attract c. north-north seeking pole attract d. north-north seeking pole attract 68. What is the process of growing two or more crops in a definite pattern? a. Inter-cropping b. Crop rotation c. Mixed cropping d. Organic cropping 69. Pasturage is related to a. fishery b. cattle c. agriculture d. sericulture 70. Nitrogen, phosphorous and potassium are examples of a. fertilizer b. micro-nutrients c. manure d. nutrients 71. Using fertilizer in farming is an example of a. high cost farming b. low cost farming c. crop farming d. farming 72. Octopus, prawn and crab are examples of a. marine fishes b. fresh-water fishes c. finned fishes d. shell fishes