सीबीएसई कोर्स क्लास नाइंथ इंग्लिश सैंपल पेपर प्रैक्टिस पेपर ऑफ हाफ इयरली एग्जाम
Answers
Explanation:
Q. (a) What is reverberation? How is different from echo?
(b) What type of sound waves are produced before the main shock wave of an earthquake?
Q. (a) State the Archimedes’ principle.
(b) An iron ball of mass 5 kg and density 5000 kg m−3 is completely immersed in water. Calculate the buoyant force acting on the ball. (Given, Density of water = 1000 kg/m3 and g = 10 m/s2)
CBSE Class 9 Science Syllabus 2018-2019
Q. 10 bulbs of 50 W each, are being used for 6 hours a day along with 5 bulbs of 100 W each, for 2 hours a day. How many `units' (kWh) of electrical energy are consumed in one day by all bulbs together.
Q. Observe the following figure of a pendulum:
Jagranjosh
At which position is the kinetic energy of pendulum the maximum?
(a) At position O
(b) At position A
(c) At position B
(d) Both at A and B
Download the complete practice paper from the following link:
CBSE Class 9 Science (Physics) Practice Paper
Importance of CBSE Class 9 Science (Physics) Practice Paper:
As, it’s very important for students to go through the practice papers to track their preparedness over what they have learned, with the same motive we are providing CBSE Class 9 Science (Physics) Practice Paper. All the important questions asked in this paper will help students give an edge to their praparation for Final (Annual) Exams. It will also help students in understanding the depth with which a topic should be studied.
Answer:
colculate the number of molecules 50 gram nacl