Choose the correct answer for the following questions.
1. Temperature of the universe in the earliest moments after the big
bang is _____.
a. 10³⁰ K b. 10³² K c. 10⁴² K d. 10³⁸ K
2. One Light Year =____ and 1 AU = ______.
a. 9.46 x 10¹² km and 1.496 x 10⁸ km
b. 9.46 x 10¹⁵ km and 1.496 x 10⁸ km
c. 9.46 x 10¹² m and 1.496 x 10¹¹ m
d. 9.46 x 10¹⁵ m and 1.496 x 10⁸ m
3. The weight of a person on the surface of the earth is 735 N. Then
what is the mass of the person?
a. 70 kg b. 73 kg c. 78 kg d. 75 kg
4. A body moving with an initial velocity of 5 m/s and accelerate at a
rate of 2 m/s². It's velocity after 10 seconds is ______.
a. 20 m/s b. 25 m/s c. 5 m/s d. 4 m/s
5. A particle is moving in a circular path of radius r. The distance
covered by the particle after half a circle would be ______.
a. Zero b. πr c. 2r d. 2πr
6. What must be the temperature in Fahrenheit, so that it will be
twice its value in Celsius?
a. 160 ⁰F b. 320 ⁰F c. 100 ⁰F d. 480 ⁰F
7. The slope of the Distance-Time graph gives
a. Speed b. Acceleration c. Velocity d. All of these
8. A box is made up of iron and it has a volume of 245 cm³. Find its
mass in kg. (Density of iron is 7.8 g/cm³)
a. 32 kg b. 3.2 kg c. 19 kg d. 1.9 kg
9. 90 km/hr = ........ m/s
a. 20 m/s b. 30 m/s c. 25 m/s d. 35 m/s
10. A vehicle accelerates from 18 km/h to 90 km/h. If acceleration is
2 m/s², the time of acceleration is .....
a. t = 20 s b. t = 10 s c. t = 25 s d. t = 12.5 s
11. 35 m/s = ....... km/hr
a. 120 km/hr b. 139 km/hr c. 126 km/hr d. 124 km/hr
12. A cylinder whose radius is 3 m and height is 7 m. What is the
volume of the cylinder?
a. 180 m³ b. 198 m³ c. 196 m³ d. 186 m³
13. What is the volume of the sphere whose radius is 3.5 m ?
a. 179.5 m³ b. 175.5 m³ c. 178.5 m³ d. 189.5 m³
14. cyclist covers a distance of 30 miles in 2 hours. What is the speed
of the cyclist in terms of km/hr ? ( 1 mile = 1.6 km)
a. 48 km/hr b. 36 km/hr c. 24 km/hr d. 12 km/hr
15. Fahrenheit users who need to work with absolute temperature
can be converted to Rankine by ________
a. ⁰R = ⁰F – 459.67 b. ⁰R = ⁰C – 459.67 c. ⁰R = ⁰F + 459.67
d. ⁰R = ⁰C + 459.67
16. A circular disc has a radius of 20 cm. Find the area of the disc in
m² (use π=3.14)
a. 12.56 m² b. 1.256 m² c. 0.1256 m² d. 125.6 m²
17. The boiling point of Mercury and Freezing point of alcohol are
___ and ___.
a. 357 ⁰C & -39 ⁰C b. 357 ⁰C & -100 ⁰C c. -39 ⁰C & -100 ⁰C
d. -39 ⁰C & -357 ⁰C
18. What is the weight of an object on moon's surface whose mass is
80 kg? (take g = 1.625 m/s²)
a. 130 N b. 134 N c. 128 N d. 120 N19. The velocity of a golf ball rolling in a straight line changes from 8
m/s to 2 m/s in 10 s. What is it's acceleration?
a. 0.6 m/s² b. -0.6 m/s² c. -1.2 m/s² d. 1.2 m/s²
20. A car travels 40 km in the 1st hour, 30 km in next 30 minutes and
80 km in the next hour. What is the average speed of the car?
a. 50 km/hr b. 55 km/hr c. 60 km/hr d. 65 km/hr
21. 60 ⁰F = .....⁰C
a. 14.55 ⁰C b. 15.55 ⁰C c. 16.55 ⁰C d. 15.50 ⁰C
22. At what temperature will it's value be same in Celsius and
Fahrenheit ?
a. -38 degree b. -35 degree c. -42 degree d. -40 degree
23. Cryogenic temperature range from _____ to ______.
a. -150 ⁰C to -273 ⁰C b. -238 ⁰F to -460 ⁰F c. 123 K to 0 K
d. All of these
24. -20 ⁰C = ........ ⁰F
a. 4 ⁰F b. -4 ⁰F c. -40 ⁰F d. -20 ⁰F
25. 1 nautical mile = ....... km & Density of mercury = .......... g/cm³
a. 1.852 km & 136 g/cm³ b. 18.52 km & 13.6 g/cm³
c. 18.52 km & 136 g/cm³ d. 1.852 km & 13.6 g/cm³
please give me the answer as soon as possible
THANK YOU......
Answers
Answered by
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Answer:
weight = mass x acceleration
=12 x 9.8
W=117.6 N
In moon it will be
W= 12kg x 1.6
W=19.2 N
Explanation:
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