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Question 14: A satellite goes round the earth in a circular orbit with constant speed. Is the motion uniform or accelerated?

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Answer: It is an example of accelerated motion, as direction of motion is changing continuously.
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nx (voice box") which is located strance of the windpipe is pulled bring it close to the back of the en a flap called epiglottis close (Fig. 15 A,B). Thus the only ailable to the swallowed food gullet or oesophagus. ng way! food you swallow gets into the immediate coughing to forcibly entered substance. De which simply conducts the to the stomach. It passes lose to the backbone. It does e enzyme. hes the oesophagus it is special movement called he wave of constrictions scles of the gut pushing As the wave passes, the alsis occurs through all -creted by all the regions ich lubricates the food. bag located below the it can hold 2 to 3 litres scular and churn the gastric juice secreted of the stomach into pylon: gate, pylorus scles (sphincter) to ve to prevent food it is thoroughly The acid serves two Gastric juice secreted by the inner lining of the stomach. It is a colourless, highly acidic liquid containing water, some salts, hydrochloric acid and an enzyme called pepsin. functions (1) it kills any germs which may have entered along with the food, and (ii) it activates pepsinogen to act on proteins Pepsin digests proteins (about 20% only) into peptides in fact, the pe first secreted as pepsinogen which is then changed to pepsin by the hydrochloric acid e pepsin is HC1 Pepsinogen (inactive) Proteins Prorennin (inactive) Casein (milk protein) (soluble) Pepsin HC BÊN KHÔNG PEPSIN (active) Peptides BENNIN (active) PARACASEIN (a peptide) (insolube) The food stays in the stomach for about 3 hours and it attains a pulp-like form called the chyme. Now, the pylorus opens intermittently to allow the chyme to move to the intestines little by little. ? Progress Check 1. Mention if the following statements are true (T) or false (F) (i) Saliva moistens and lubricates food. ontains a protein-digesting enzyme. (ii) Saliva (ii) Saliva tends to destroy germs in the mouth. (iv) Peristalsis occurs through all regions of the gut. (v) The food in stomach stays for about 10 hours. Gastric juice is alkaline. (1) Duodenum Short upper part next to stomach. duodenum means 12, twe finger widths in length, daewo, desi ten). The common bile duct opens into this part (ii) Telunum: Next short region of about 2 metres jejunum means empty. it is nearly always empty afte found in dissections or in post-mortem (1) Beum About metres ilcum means to twist/roll, referring to the twisting movements of this part). The inner lining of the team is made into great number of tiny finger-like projections called willigsingular villius) (The villi enormously increase the inner surface area of the intestines (nearly 8 times that of the outer body surface) which facilitates the absorption of digested foods Between the villi are small holes through which the intestinal juice secreted by its glandular cells is poured into the lumen of the intestine. Each villus (Fig. 11.6) is covered by a single-cell thick epithelium Inside the villus are contained an artery, a vein, inter-connecting blood capillaries and a lymph vessel called lacteal. The small intestine serves both for digestion and absorption. It receives two digestive juicest (i) the bile and (ii) the pancreatic juice in the duodenum and its own walls secrete the intestinal juice in the ileum AWAY EPITHELIUM CAPILLARIES LACTEAL
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Question Text
Question 14: A satellite goes round the earth in a circular orbit with constant speed. Is the motion uniform or accelerated?

Figure
Updated OnJun 11, 2023
TopicMotion
SubjectScience
ClassClass 9
Answer TypeText solution:1 Video solution: 1
Upvotes158
Avg. Video Duration5 min