Get premium membership and access questions with answers, video lessons as well as revision papers.
Friction force F = centripetal force
=MV^2/r
=(1400 x 35 x 35 )/300
=5716.67 N
joseph rimiru answered the question on October 12, 2017 at 16:40
- A bucket of water was swung in a vertical circle without the water pouring out. Explain.(Solved)
A bucket of water was swung in a vertical circle without the water pouring out. Explain.
Date posted: October 12, 2017. Answers (1)
- A balloon of volume 300 ml at a temperature of 393 K was filled with air. Determine the volume when the temperature rises to 473...(Solved)
A balloon of volume 300 ml at a temperature of 393 K was filled with air. Determine the volume when the temperature rises to 473 K at the same pressure.
Date posted: October 12, 2017. Answers (1)
- If a gas in a cylinder initially at 30°C and at a pressure of 1.03 x 10^5 pa is compressed to one sixth of its...(Solved)
If a gas in a cylinder initially at 30⁰C and at a pressure of 1.03 x 10^5 pa is compressed to one sixth of its original volume. Determine the pressure required to do this.
Date posted: October 12, 2017. Answers (1)
- Some 4 kg water in a plastic jug was heated using an immersion heated 2.0 kw. It was on for 6 minutes. Determine
a. The quantity...(Solved)
Some 4 kg water in a plastic jug was heated using an immersion heated 2.0 kw. It was on for 6 minutes. Determine
a. The quantity of heat gained by the water.
b. The temperature change
Date posted: October 12, 2017. Answers (1)
- Explain why it is necessary to leave an air space in a soda bottle when it is kept in the refrigerator.(Solved)
Explain why it is necessary to leave an air space in a soda bottle when it is kept in the refrigerator.
Date posted: October 12, 2017. Answers (1)
- A rectangular brick of weight 10 N, measures 50 cm × 30 cm × 10 cm. calculate the values of the maximum and minimum pressures...(Solved)
A rectangular brick of weight 10 N, measures 50 cm × 30 cm × 10 cm. calculate the
values of the maximum and minimum pressures which the block exert when resting on a horizontal plane
Date posted: October 12, 2017. Answers (1)
- State two differences between mass and weight.(Solved)
State two differences between mass and weight.
Date posted: October 12, 2017. Answers (1)
- State and explain two factors affecting the surface tension(Solved)
State and explain two factors affecting the surface tension.
Date posted: October 12, 2017. Answers (1)
- 100 cm^3 of fresh water of density 1,000 kgm^-3 is mixed with 100 cm^3 of sea water of density 1030 kgm^-3. Calculate the density of...(Solved)
100 cm^3 of fresh water of density 1,000 kgm^-3 is mixed with 100 cm^3 of sea water of density 1030 kgm^-3. Calculate the density of the mixture.
Date posted: October 12, 2017. Answers (1)
- Define the term relative density as used in quantity measurement.(Solved)
Define the term relative density as used in quantity measurement.
Date posted: October 12, 2017. Answers (1)
- The mass of an empty density bottle is 20 g. Its mass when filled with water is 40.0 g and 50.0 g when filled with...(Solved)
The mass of an empty density bottle is 20 g. Its mass when filled with water is 40.0 g and 50.0 g when filled with liquid X. Calculate the density of liquid X if the density of water is 1,000 kgm^-3
Date posted: October 12, 2017. Answers (1)
- A block of mass 187.5 gis 5 cm long, 2.0cm thick, and 7.5 cm high.Calculate the density in s.i units(Solved)
A block of mass 187.5 gis 5 cm long, 2.0cm thick, and 7.5 cm high.Calculate the density in s.i units.
Date posted: October 12, 2017. Answers (1)
- 1. Which is greater
a. 3:2 or 5:4
b. 3:4 or 5:7
(Solved)
1. Which is greater
a. 3:2 or 5:4
b. 3:4 or 5:7
Date posted: October 12, 2017. Answers (1)
- The price of a piece of land was adjusted in the ratio 7:3. If the original price was sh.210000. What is the new price?(Solved)
1The price of a piece of land was adjusted in the ratio 7:3. If the original price was sh.210000. What is the new price?
Date posted: October 11, 2017. Answers (1)
- What is the rate of consumption per day if twenty bays of beans are consumed in 100 days?(Solved)
What is the rate of consumption per day if twenty bays of beans are consumed in 100 days?
Date posted: October 11, 2017. Answers (1)
- A pressure cooker is preferred for cooking at high altitude. Explain why.(Solved)
A pressure cooker is preferred for cooking at high altitude. Explain why.
Date posted: October 11, 2017. Answers (1)
- State one factor that affect the melting point of ice other than pressure.(Solved)
State one factor that affect the melting point of ice other than pressure.
Date posted: October 11, 2017. Answers (1)
- A student found that a drop of methylated spirit on the back of the hand felt colder than a drop of water at...(Solved)
A student found that a drop of methylated spirit on the back of the hand felt colder than a drop of water at the same temperature. Explain.
Date posted: October 11, 2017. Answers (1)
- A heater rated 3.5 kw is used to raise the temperature of 5 kg of water through 70° C. Calculate the time required. (specific heat...(Solved)
A heater rated 3.5 kw is used to raise the temperature of 5 kg of water through 70⁰ C. Calculate the time required. (specific heat capacity of water is 4200 J/kg K). Give your answer in minutes.
Date posted: October 11, 2017. Answers (1)
- An immersion heater rated 900 w is placed in a liquid of mass 4 kg. It was switched on for 20 minutes and the temperature...(Solved)
An immersion heater rated 900 w is placed in a liquid of mass 4 kg. It was switched on for 20 minutes and the temperature of the liquid raised from 25°C to 35°C. Determine the specific heat capacity of the liquid
Date posted: October 11, 2017. Answers (1)