Answer: An angle that is measuring less than 90 degrees is called an acute angle. This angle is smaller than the right angle (which is equal to... View Article
Answer: tan A = cot B We know that cot B = tan (90° – B) To prove A + B = 90°, substitute the above equation in the given problem tan A = tan... View Article
Answer: Because charge separation cannot occur in conductors, lightning will not impact the building and any lightning that strikes it will fall... View Article
Answer: There will be no repellent effect between the aluminium strips. Because the ebonite rod is an insulator, the charged body will not... View Article
Answer: (b) decreases Friction will be reduced as oil acts as a lubricant, reducing friction. When the surface of one object comes into touch... View Article
Answer: We know that x3 + y3 + z3 - 3xyz = (x + y + z)(x2 + y2 + z2 - xy - yz - xz) Now, according to the question, let (x + y + z) = 0, then,... View Article
Answer: If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the negative Electroplating is a... View Article
Answer: No, the object will not be subjected to any frictional force since the force of friction requires two surfaces, and there is only one in... View Article
Answer: In a given triangle PQR, right angled at Q, the following measures are PQ = 5 cm PR + QR = 25 cm Now let us assume, QR = x PR = 25 -... View Article
Answer: (d) gravel She should use a gravel surface path because only in this path. She will have sufficient friction force to walk easily.... View Article
Answer: If the clip of the electroscopic gets in contact with the positively charged object then negatively charged provided earlier will get... View Article
Answer: Because water in water hoses contains salts, it is an excellent conductor of electricity. If the area's electrical supply isn't turned... View Article
Answer: (a) Magnitude of force applied by A is greater than that of B. When force is applied to a stationary object, the object tends to move in... View Article
Answer: The Earth's day and night are determined by the Sun's position. The day will be on the side of the Earth-facing the Sun, while the other... View Article
Answer: (c) decrease its amplitude of vibration of the sound. Sound is directly proportional to the loudness of sound. As a result by decreasing... View Article
Answer: Copper will be deposited on the carbon rod from the copper sulphate solution. When an electric current is passed through a copper... View Article