Join now for JEE/NEET and also prepare for Boards Join now for JEE/NEET and also prepare for Boards. Register Now
Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
A large rock is tied to a balloon filled with air. Both are placed in a lake. As the balloon sinks: (a) The air pressure inside the balloon (A) increases. (B) remains the same. (C) decreases. (D) varies in an unpredictable manner. (b) The average density of the balloon + air + rock (A) increases. (B) remains the same. (C) decreases. (D) varies in an unpredictable manner. (c) The magnitude of the net force on the balloon + air + rock (A) increases. (B) remains the same. (C) decreases. (D) varies in an unpredictable manner. A large rock is tied to a balloon filled with air. Both are placed in a lake. As the balloon sinks:(a) The air pressure inside the balloon(A) increases. (B) remains the same. (C) decreases.(D) varies in an unpredictable manner.(b) The average density of the balloon + air + rock(A) increases. (B) remains the same. (C) decreases. (D) varies in an unpredictable manner.(c) The magnitude of the net force on the balloon + air + rock(A) increases. (B) remains the same. (C) decreases. (D) varies in an unpredictable manner.
(a) The correct option is (A).The pressure of the water in the lake increases with depth. As the balloon sinks deeper inside the lake, the pressure of the water is increase. This makes the force acting normally on the air molecules inside the balloon increases with depth. Thus, the air pressure inside the balloon will also increase. Therefore, option (A) is correct.Other options are rules out.(b) The correct option is (A).It is found that the pressure start increasing once the balloon start sinking. From ideal gas equation, the pressure of the gas times the volume remains constant at constant temperature. Consider the temperature of the water in the lake to be constant. This means there would be decrease in the volume of the balloon. This means the volume of the air molecules will also decrease. It is also known that density is mass per unit volume. If the volume of the air molecule is decreased, than the density of the air molecule is increase. As the density of the balloon and rock remain constant. The increase in the density of the balloon, rock and air molecules also increases. Therefore, option (A) is correct.Other options are rules out.(c) The correct option is (A).The force acting on the balloon, air and rock is the pressure exerted by the water times the surface area. Now, the net force acting is equal to the difference in the force on the balloon, air and rock in air and the buoyant force acting on them. As it goes deeper, the magnitude of the net force will start increasing.Therefore, option (A) is correct.Other options are rules out.
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -