(b) As the object is moving on a frictionless horizontal surface with a constant velocity of 4 m s¯¹, its acceleration is zero and hence no force is acting on the given object. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
(b) As the object is moving on a frictionless horizontal surface with a constant velocity of 4 m s¯¹, its acceleration is zero and hence no force is acting on the given object.
(b) As the athlete completes one round of a circular track in 40 s, hence in 2 min 20 s (or 140s) he will complete 7/2 rounds. Thus as shown in figure if he starts running from point A then on completion of 7/2 round he will be at point B. Thus, net displacement of the athlete AB = 2R. https://www.tRead more
(b) As the athlete completes one round of a circular track in 40 s, hence in 2 min 20 s (or 140s) he will complete 7/2 rounds. Thus as shown in figure if he starts running from point A then on completion of 7/2 round he will be at point B. Thus, net displacement of the athlete AB = 2R.
The correct answer is (c) Evaporation, diffusion, expansion of gases. Increasing temperature enhances evaporation by providing more energy to molecules, diffusion by increasing molecular motion, and expansion of gases due to increased kinetic energy, causing gases to occupy more volume. https://www.Read more
The correct answer is (c) Evaporation, diffusion, expansion of gases.
Increasing temperature enhances evaporation by providing more energy to molecules, diffusion by increasing molecular motion, and expansion of gases due to increased kinetic energy, causing gases to occupy more volume.
(d) Starch grains are manufactured in chloroplast during photosynthesis. Hormones are manufactured by endocrine glands. Ribosomes are site of protein synthesis and chemically all enzymes are proteins. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
(d) Starch grains are manufactured in chloroplast during photosynthesis. Hormones are manufactured by endocrine glands. Ribosomes are site of protein synthesis and chemically all enzymes are proteins.
An object of mass 5 kg is sliding with a constant velocity of 4 m s¯¹ on a frictionless horizontal surface. The force required to keep the object moving with the same velocity is
(b) As the object is moving on a frictionless horizontal surface with a constant velocity of 4 m s¯¹, its acceleration is zero and hence no force is acting on the given object. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
(b) As the object is moving on a frictionless horizontal surface with a constant velocity of 4 m s¯¹, its acceleration is zero and hence no force is acting on the given object.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/
See lessAn athlete complete one round of a circular track of radius R in 40 seconds. What will be his displacement at the end of 2 min 20 s?
(b) As the athlete completes one round of a circular track in 40 s, hence in 2 min 20 s (or 140s) he will complete 7/2 rounds. Thus as shown in figure if he starts running from point A then on completion of 7/2 round he will be at point B. Thus, net displacement of the athlete AB = 2R. https://www.tRead more
(b) As the athlete completes one round of a circular track in 40 s, hence in 2 min 20 s (or 140s) he will complete 7/2 rounds. Thus as shown in figure if he starts running from point A then on completion of 7/2 round he will be at point B. Thus, net displacement of the athlete AB = 2R.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
See lessWhich of the following can be crystallised?
(c) Viruses behave as non-living outside the cells of host. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
(c) Viruses behave as non-living outside the cells of host.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
See lessWhich one of the following sets of phenomenon would increase on raising the temperature? (a) Diffusion, evaporation, compression of gases. (b) Evaporation, compression of gases, solubility. (c) Evaporation, diffusion, expansion of gases. (d) Evaporation, solubility, diffusion, compression of gases.
The correct answer is (c) Evaporation, diffusion, expansion of gases. Increasing temperature enhances evaporation by providing more energy to molecules, diffusion by increasing molecular motion, and expansion of gases due to increased kinetic energy, causing gases to occupy more volume. https://www.Read more
The correct answer is (c) Evaporation, diffusion, expansion of gases.
Increasing temperature enhances evaporation by providing more energy to molecules, diffusion by increasing molecular motion, and expansion of gases due to increased kinetic energy, causing gases to occupy more volume.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
See lessWhich of the following options are not a function of Ribosomes? (1) It helps in manufacture of starch grains. (ii) It helps in manufacture of hormones. (iii) It helps in manufacture of enzymes. (iv) It helps in manufacture of protein molecules.
(d) Starch grains are manufactured in chloroplast during photosynthesis. Hormones are manufactured by endocrine glands. Ribosomes are site of protein synthesis and chemically all enzymes are proteins. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
(d) Starch grains are manufactured in chloroplast during photosynthesis. Hormones are manufactured by endocrine glands. Ribosomes are site of protein synthesis and chemically all enzymes are proteins.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
See less