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3171

What is the energy stored in a 10μ F capacitor if the potential difference between the plates is 40 V?

A. 2.0 × 10^-4J
B. 8.0 ×10^-4J
C. 4.0 × 10^-3J
D. 8.0 × 10^-3J
E. 1.6 × 10^-2J

View Answer & Discuss (2) NECO 2001

3172

Notes of the same frequency sounded on a piano and on a flute may differ in

I. pitch
II. quality
III. Loudness

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II and III

View Answer & Discuss (1) NECO 2001

3173

What is X in the equation given below? 42He + 94Be → 126C + X

A. electron
B. hydrogen
C. lithium
D. neutron
E. proton

View Answer & Discuss (2) NECO 2001

3174

A waterfall is 630m high. What is the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall? (Neglect heat losses to the surroundings, take g as 10 ms-2 and specific heat capacity of weather as 4200J kg-1K-1

A. 0.015°C
B. 1.50°C
C. 15.00°C
D. 21.00 °C
E. 50.00°C

View Answer & Discuss (12) NECO 2001

3175

N.N.P.C. gas cylinder containing 15kg of cooking gas was left open, and the gas emptied in 3.8 minutes, at an average speed of 20 ms^-1. What force was exerted on the gas in the cylinder?

A. 132N
B. 13.2N
C. 1.32N
D. 0.132N
E. 0.013N

View Answer & Discuss (3) NECO 2001

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