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Moraa orina answered the question on April 5, 2018 at 07:23
- A battery is rated at 30 Ah. For how long will it work if it steadily supplies a current of 3 A?(Solved)
A battery is rated at 30 Ah. For how long will it work if it steadily supplies a current of 3 A?
Date posted: April 5, 2018. Answers (1)
- The current in a single loop is 3.0 A. How long would it take for a charge of 3600
coulombs to flow?(Solved)
The current in a single loop is 3.0 A. How long would it take for a charge of 3600
coulombs to flow?
Date posted: April 5, 2018. Answers (1)
- The length of a pinhole camera is 25.0 cm. An object 2.0 cm is placed 10.0 m from the
pinhole. Calculate the height of the...(Solved)
The length of a pinhole camera is 25.0 cm. An object 2.0 cm is placed 10.0 m from the
pinhole. Calculate the height of the image produced and its magnification
Date posted: April 5, 2018. Answers (1)
- Calculate the height of a building 300 m away from a pinhole camera which produces
an image 2.5 cm high if the distance between the...(Solved)
Calculate the height of a building 300 m away from a pinhole camera which produces
an image 2.5 cm high if the distance between the pinhole and the screen is 5.0 cm.
Date posted: April 5, 2018. Answers (1)
- List four applications of radiation(Solved)
List four applications of radiation.
Date posted: April 5, 2018. Answers (1)
- State the applications of conductors(Solved)
State the applications of conductors
Date posted: April 5, 2018. Answers (1)
- Starting a car with 12 volts battery is better than 12 dry cells in series.Explain(Solved)
Starting a car with 12 volts battery is better than 12 dry cells in series.Explain
Date posted: April 5, 2018. Answers (1)
- The master cylinder piston in a car braking system has a diameter of 2.0 cm. The
effective area of the brake pads on each of...(Solved)
The master cylinder piston in a car braking system has a diameter of 2.0 cm. The
effective area of the brake pads on each of the four wheels is 30 cm2
. The driver
exerts a force of 500 n on the brake pedal. Calculate
a) The pressure in the master cylinder
b) The total braking force in the car.
Date posted: April 4, 2018. Answers (1)
- The area of the smaller piston of a hydraulic press is 0.01 m2 and that of the bigger piston is 0.5 m2. If the force...(Solved)
The area of the smaller piston of a hydraulic press is 0.01 m2
and that of the bigger
piston is 0.5 m. If the force applied to the smaller piston is 2 N, what force is
transmitted to the larger piston?
Date posted: April 4, 2018. Answers (1)
- Explain how a hydraulic press works(Solved)
Explain how a hydraulic press works
Date posted: April 4, 2018. Answers (1)
- Describe how a hydraulic brake system works(Solved)
Describe how a hydraulic brake system works
Date posted: April 4, 2018. Answers (1)
- Explain the applications of pressure in gases and liquids(Solved)
Explain the applications of pressure in gases and liquids
Date posted: April 4, 2018. Answers (1)
- The height of the mercury column in a barometer is found to be 67.0 cm at a certain place.
What would be the height of...(Solved)
The height of the mercury column in a barometer is found to be 67.0 cm at a certain place.
What would be the height of a water barometer at the same place? (densities of mercury-
1.36 × 104
kg/m3
and water- 1.0 × 103
kg/m3
).
Date posted: April 4, 2018. Answers (1)
- The density of mercury is 13,600 kgm-3
. Determine the liquid pressure at a point 76 cm
below the surface of mercury. (Take g = 10...(Solved)
The density of mercury is 13,600 kgm-3
. Determine the liquid pressure at a point 76 cm
below the surface of mercury. (Take g = 10 Nkg-1
)
S
Date posted: April 4, 2018. Answers (1)
- A diver is 10 m below the surface of water in a dam. If the density of water is 1,000 kgm-3
, determine the pressure due...(Solved)
A diver is 10 m below the surface of water in a dam. If the density of water is 1,000 kgm-3
, determine the pressure due to the water on the diver. (Take g = 10 Nkg-1
)
Date posted: April 4, 2018. Answers (1)
- A man of mass 84 kg stands upright on a floor. If the area of contact of his shoes and
the floor is 420 cm2
,...(Solved)
A man of mass 84 kg stands upright on a floor. If the area of contact of his shoes and
the floor is 420 cm2
, determine the average pressure he exerts on the floor. (Take g =
10 N/Kg)
Date posted: April 4, 2018. Answers (1)
- Differentiate between scalar and vector quantity giving examples(Solved)
Differentiate between scalar and vector quantity giving examples
Date posted: April 3, 2018. Answers (1)
- Explain the differences between mass and weight(Solved)
Explain the differences between mass and weight
Date posted: April 3, 2018. Answers (1)
-
An astronaut weighs 900 N on earth. On the moon he weighs 150 N. Calculate the moons’
gravitational strength. (Take g = 10 N/kg)(Solved)
An astronaut weighs 900 N on earth. On the moon he weighs 150 N. Calculate the moons’
gravitational strength. (Take g = 10 N/kg)
Date posted: April 3, 2018. Answers (1)
- What is induction? What is earthing?(Solved)
What is induction?
What is earthing?
Date posted: April 3, 2018. Answers (1)