Description : A body is moving with velocity 4 m/s , possesses 56 Joules of Kinetic Energy. The momentum of body will be equal to -Physics
Last Answer : (d) 28 kgms-1
Description : A wound watch spring possesses energy in the form of a.Mechanical potential energy b.Kinetic energy c.Spring energy d.Potential energy e.Both potential and kinetic energy
Last Answer : a. Mechanical potential energy
Description : Dynamo is a device for converting – (1) Heat energy into electrical energy (2) Mechanical energy into electrical energy (3) Magnetic energy into electrical energy (4) Chemical energy into electrical energy
Last Answer : (2) Mechanical energy into electrical energy Explanation: A dynamo is a device for converting mechanical energy into electrical energy, esp. one that produces direct current. A dynamo is an ... were based, including the electric motor, the alternating-current alternator, and the rotary converter.
Description : A photoelectric cell converts – (1) Mechanical energy to electric energy (2) Heat energy to mechanical energy (3) Light energy to chemical energy (4) Light energy to electrical energy
Last Answer : (4) Light energy to electrical energy Explanation: Photoelectric cell or photocell, device whose electrical characteristics (e.g., current, voltage, or resistance) vary when light is incident ... The most common type consists of two electrodes separated by a light-sensitive semiconductor material.
Description : A steam engine converts the heat energy of steam into _____. (1) Electrical energy (2) Chemical energy (3) Mechanical energy (4) Thermal energy
Last Answer : (3) Mechanical energy Explanation: Steam engine, machine for converting heat energy into mechanical energy using steam as a medium, or working fluid.
Description : A photo-electric cell converts (1) mechanical energy to electric energy (2) heat energy to mechanical energy (3) light energy to chemical energy (4) light energy to electrical energy
Last Answer : light energy to electrical energy
Description : Dynamo is a device for converting (1) Heat energy into electrical energy (2) Mechanical energy into electrical energy (3) Magnetic energy into electrical energy (4) Chemical energy into electrical energy
Last Answer : Mechanical energy into electrical energy
Description : The molecules of a gas moving through space with some velocity possesses what kind of energy? A. Translational energy B. Spin energy C. Rotational kinetic energy D. Sensible energy
Last Answer : Translational energy
Description : Portland pozzolana cement possesses (A) Higher resistance to chemical attack (B) Lower heat of hydration (C) Lower shrinkage on drying (D) All the above
Last Answer : Answer: Option D
Description : When brakes are applied on a moving vehicle the kinetic energy is converted to A. Mechanical energy B. Heat energy C. Electrical energy D. Potential energy
Last Answer : B. Heat energy
Description : Moving electric charge produces - (1) magnetic field (2) sound waves (3) light rays (4) heat waves
Last Answer : (1) magnetic field Explanation: An electric charge always produces an electric field, regardless of speed, and a moving charge generates a magnetic field. An electric current passing through a conductor produces a magnetic field because it has many charges in motion.
Description : Moving electric charge produces : (1) magnetic field (2) sound waves (3) light rays (4) heat waves
Last Answer : magnetic field
Description : A dynamo converts ______. (1) Mechanical energy into sound energy (2) Mechanical energy into electrical energy (3) Electrical energy into mechanical energy (4) None of these
Last Answer : (2) Mechanical energy into electrical energy Explanation The dynamo, by attaching it in between the two tires, converts the mechanical energy (which of course, is produced by paddling) into electrical energy, and by connecting the wires going out of the dynamo to light, it glows without any flaw.
Description : Mechanical energy is the combination of kinetic energy and _______. (1) Heat energy (2) Chemical energy (3) Potential energy (4) Nuclear energy
Last Answer : (3) Potential energy Explanation: Mechanical energy is the energy possessed by an object due to either its motion or its stored energy of position. The total amount of mechanical energy is merely the sum of potential energy and kinetic energy.
Description : The following is the correct order of energy conversion in thermal power plants a. Chemical energy - Mechanical energy - Electrical energy b. Mechanical energy - Chemical energy - Electrical energy c ... - Mechanical energy - Electrical energy d. Heat energy - Electrical energy - Mechanical energy.
Last Answer : a. Chemical energy – Mechanical energy – Electrical energy
Description : In an electric motor, the energy transformation is from _______. (1) electrical to chemical (2) chemical to light (3) mechanical to electrical (4) electrical to mechanical
Last Answer : (4) electrical to mechanical Explanation: An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this would be the conversion of mechanical energy into electrical energy and is done by an electric generator.
Description : The stomach is a chemical barrier to infection because the stomach a. Contains bile. b. Harbors helicobacterpylori, a member of the host microbiota. c. Possesses defensive cells. d. Has an acid ph.
Last Answer : d. Has an acid ph.
Description : Pick up the correct statement regarding low heat cement from the following: (A) It possesses less compressive strength (B) Its initial setting time is about one hour (C) Its final setting time is about 10 hours (D) All the above
Description : The law of conservation of mechanical energy is valid a.Irrespective of the nature of force field b.Only in gravitational field c.Only if the total work done by the particle in moving around in a closed trajectory is zero d.Only if the force is tangential to the trajectory e.None of the above
Last Answer : c. Only if the total work done by the particle in moving around in a closed trajectory is zero
Description : Is a garden hose with moving water an example of mechanical energy?
Last Answer : Need answer
Description : Sensitivity to hot and cold foods soon after cavity preparation and placement of GIC and composite resin in an upper incisor tooth is due to: A. Mechanical trauma due to cavity preparation B. Chemical C. Heat from GIC settings
Last Answer : A. Mechanical trauma due to cavity preparation
Description : What form of energy refers to those a system possesses as a whole with respect to some outside reference frame, such as potential and kinetic energies? A. Macroscopic form of energy B. Microscopic form of energy C. Internal energy D. External energy
Last Answer : Macroscopic form of energy
Description : The crack of a bullwhip results from the bullwhip's tip: w) approaching the speed of sound x) exceeding the speed of sound y) moving with constant velocity z) none of the above
Last Answer : ANSWER: X -- EXCEEDING THE SPEED OF SOUND
Description : How can sound be considered to be mechanical energy?
Last Answer : Mechanical energy is the energy possessed because of the motionand position of an object. Sound is the vibration (motion) ofparticles.
Description : In microphone, transformation of energy takes place from (a) Sound into electrical energy (b) Electrical into sound energy (c) Sound into mechanical energy (d) Mechanical into sound energy
Last Answer : Ans:(b)
Description : Energy conversions taking place in a microphone are (a) sound to mechanical to electrical (b) electrical to mechanical to sound (c) sound to mechanical (d) mechanical to sound
Last Answer : Ans:(a)
Description : Speaker is a device that __________. A. convert current variations into sound waves B. none of these C. convert electrical energy to mechanical energy D. convert sound waves into current and voltage
Last Answer : A. convert current variations into sound waves
Description : A car with a mass of 1000 kilogram is moving at a speed of 10 meters per second. The kinetic energy of the car is: w) 100 Joules x) 5000 Joules y) 10,000 Joules z) 50,000 Joules
Last Answer : ANSWER: Z -- 50,000 JOULES
Description : Is sanding a board chemical energy to mechanical or electrical energy?
Last Answer : Feel Free to Answer
Description : The process of photosynthesis involves conversion of (1) chemical energy into radiant energy (2) chemical energy into mechanical energy (3) solar energy into chemical energy (4) mechanical energy into solar energy
Last Answer : (3) solar energy into chemical energy Explanation: Photosynthesis is the process by which light energy is converted into chemical. Energy by organisms. Carbon dioxide, and water are the raw materials of this process. The light energy comes from the sun and its end products are oxygen and glucose.
Description : In an atomic explosion enormous energy is released which is due to the - (1) Conversions of neutrons into protons (2) Conversion of chemical energy into nuclear energy (3) Conversion of mechanical energy into nuclear energy (4) Conversion of mass into energy
Last Answer : (4) Conversion of mass into energy
Description : The sum of potential energy and kinetic energy is known as : (1) Electrical energy (2) Chemical energy (3) Light energy (4) Mechanical energy
Last Answer : (4) Mechanical energy Explanation: In physical sciences, mechanical energy is the sum ofpotential energy and kinetic energy. It is the energy associated with the motion and position of an object.
Description : The nerve fiber is capable of converting which stimuli to electrical energy a. Mechanical b. chemical c. Both d. none of them
Last Answer : Both
Description : A fuel cells converts ………energy into electrical energy A. Mechanical B. Magnetic C. Solar D. Chemical
Last Answer : D. Chemical
Description : What purpose does a generator serve in a hybrid vehicle? (a) It converts nuclear energy 6more nuclear energy. (b)It converts mechanical energy into electrical energy. (c) It converts chemical energy into electrical energy. (d)It converts electrical energy into mechanical energy.
Last Answer : (b)It converts mechanical energy into electrical energy.
Description : Alternating current generator converts.......... energy into electrical energy? a. mechanical energy b. chemical energy c. solar energy d. potential energy
Last Answer : a. mechanical energy
Last Answer : solar energy into chemical energy
Description : The energy stored in a watch spring is (1) Kinetic energy (2) Potential energy (3) Heat energy (4) Chemical energy
Last Answer : (2) Potential energy
Description : In a photocell light energy is converted into – (1) Potential energy (2) Chemical energy (3) Heat energy (4) Electrical energy
Last Answer : (4) Electrical energy Explanation: Photocells are scientifically known as photo-resistors. A photo-resistor or light dependent resistor (LDR) is a resistor whose resistance decreases with increasing ... by the semiconductor give bound electrons enough energy to jump into the conduction band.
Description : In a photocell light energy is converted into (1) potential energy (2) chemical energy (3) heat energy (4) electrical energy
Last Answer : electrical energy
Description : The energy stored in a watch spring is (1) kinetic energy (2) potential energy (3) heat energy (4) chemical energy
Last Answer : potential energy
Description : If L is the length of a moving vehicle and R is the radius of curve, the extra mechanical width b to be provided on horizontal curves, (A) L/R (B) L/2R (C) L²/2R (D) L/3R
Last Answer : Answer: Option C
Description : The______electro mechanical switch (developed in 1938) had fewer moving parts than earlier switches. (A) No. 1ESS (B) Strowger (C) Step-by-step (D) Crossbar
Last Answer : (D) Crossbar
Description : How does mechanical energy change into heat energy?
Last Answer : It can convert in several different ways; one common way isthrough friction.
Description : Heat engine uses ______ energy to produce mechanical work. a. Thermal b. Fluid c. Kinetic d. Electric (Ans:a)
Last Answer : Which of the following is not an internal Combustion (IC) engine? a. Gas engine b. Wankel engine c. Jet engine d. Stirling engine (Ans:d)
Description : The energy consumed by an AC motor, as strictly reactive power, is _____________. A. used to do mechanical work B. used to establish the magnetic field of the motor C. lost as heat generated by the windings D. lost in doing work to turn the motor itself
Last Answer : Answer: B
Description : The effect of heat used in converting heat energy to mechanical energy is
Last Answer : change of state of matter.
Description : Why cannot increase in temperature and expansion not be used for converting heat energy into mechanical energy?
Last Answer : Increase in temperature cannot be used to convert heat energy in to mechanical energy. Expansion of solids, liquids and gases by heat is very small to make it convert into mechanical energy.
Description : Which effect of heat is used in conversion of heat energy into mechanical energy?
Last Answer : Change of liquid to gaseous state of matter is most in designing heat engines.