33) The scientist responsible for demonstrating that heat and light can be produced by electricity was A) Thomas Seebeck. C) Michael Faraday B) Thomas Edison. D) Hans Oersted 39) Flowing water has A) kinetic energy due to its position. B) potential energy due to its position. C) potential energy due to its motion. D) kinetic energy due to its motion. 40) A cheerleader standing at the top of a human pyramid has 3.01 k) of gravitational potential energy. If the cheerleader is 4.50 m above the surface of the earth, her mass must be A) 669 kg. B) 68.2 kg C) 307 kg. D) 14.7 kg. 41) The manipulated equation listed below that will determine the height of an object given its mass and potential energy is A) H=E_(p)times m/g B) H=E_(p)times g/m C) H=mg/E_(p) D) H=E_(p)/mg 42) A soccer ball is kicked straight up.While it rises and falls, its potential energy A) decreases then increases. B) decreases then remains constant. C) increases then decreases. D) increases then remains constant. 43) The weight of a 45.0-kg object is A) 45 N. B) 312 N C) 2025 N. D) 441 N. 44) A golf ball leaving the tee has a kinetic energy of 110 J and a velocity of 70m/s The mass of the golf ball is A) 0.011 kg. B) 0.045 kg. C) 3.1 kg D) 1.6 kg. 45) The kinetic energy of an NHL hockey player is 4.50 kJ.If the player has a mass of 114 kg, his speed is A) 6.28m/s B) 19.7m/s C) 78.9m/s D) 8.89m/s. 46) A 0.547 kg pizza crust is thrown straight up in the air.Ata height of 2.30 m above the surface of Earth it has a speed of 5.00m/s The total mechanical energy of the pizza a ust is A) 12.3 J. B) 5.50 ] C) 19.2 J. D) 6.84] 47) A45.0ggolf ball is released 2.50 m above the ground. The velocity of the golf ball when it hits the ground is A) 3.50m/s B) 49.0m/s C) 7.00m/s D) 12.3m/s 38) 39) 41) 42) 43

Question

33) The scientist responsible for demonstrating that heat and light can be produced by electricity was A) Thomas Seebeck. C) Michael Faraday B) Thomas Edison. D) Hans Oersted 39) Flowing water has A) kinetic energy due to its position. B) potential energy due to its position. C) potential energy due to its motion. D) kinetic energy due to its motion. 40) A cheerleader standing at the top of a human pyramid has 3.01 k) of gravitational potential energy. If the cheerleader is 4.50 m above the surface of the earth, her mass must be A) 669 kg. B) 68.2 kg C) 307 kg. D) 14.7 kg. 41) The manipulated equation listed below that will determine the height of an object given its mass and potential energy is A) H=E_(p)times m/g B) H=E_(p)times g/m C) H=mg/E_(p) D) H=E_(p)/mg 42) A soccer ball is kicked straight up.While it rises and falls, its potential energy A) decreases then increases. B) decreases then remains constant. C) increases then decreases. D) increases then remains constant. 43) The weight of a 45.0-kg object is A) 45 N. B) 312 N C) 2025 N. D) 441 N. 44) A golf ball leaving the tee has a kinetic energy of 110 J and a velocity of 70m/s The mass of the golf ball is A) 0.011 kg. B) 0.045 kg. C) 3.1 kg D) 1.6 kg. 45) The kinetic energy of an NHL hockey player is 4.50 kJ.If the player has a mass of 114 kg, his speed is A) 6.28m/s B) 19.7m/s C) 78.9m/s D) 8.89m/s. 46) A 0.547 kg pizza crust is thrown straight up in the air.Ata height of 2.30 m above the surface of Earth it has a speed of 5.00m/s The total mechanical energy of the pizza a ust is A) 12.3 J. B) 5.50 ] C) 19.2 J. D) 6.84] 47) A45.0ggolf ball is released 2.50 m above the ground. The velocity of the golf ball when it hits the ground is A) 3.50m/s B) 49.0m/s C) 7.00m/s D) 12.3m/s 38) 39) 41) 42) 43

Answer 1

33) **C) Michael Faraday** is the scientist best known for demonstrating that electricity can produce heat and light. While Edison developed practical applications of electricity for lighting, Faraday's experiments were fundamental in establishing the relationship.39) **D) kinetic energy due to its motion.** Kinetic energy is the energy of motion. Potential energy is related to position.40) **B) 68.2 kg*** Gravitational potential energy (Ep) = mgh, where m is mass, g is acceleration due to gravity (9.8 m/s²), and h is height.* We are given Ep = 3.01 kJ = 3010 J and h = 4.50 m.* Rearranging the formula: m = Ep / (gh)* m = 3010 J / (9.8 m/s² * 4.50 m) * m ≈ 68.2 kg41) **D) H = Ep / (mg)** This is the correct rearrangement of the potential energy formula (Ep = mgh) to solve for height (H).42) **C) increases then decreases.** As the ball rises, it gains potential energy (due to increased height) and loses kinetic energy (slows down). As it falls, the process reverses.43) **D) 441 N.** Weight (W) is the force of gravity on an object and is calculated as W = mg, where m is mass and g is acceleration due to gravity (approximately 9.8 m/s² on Earth). Therefore, W = 45.0 kg * 9.8 m/s² ≈ 441 N.44) **B) 0.045 kg*** Kinetic energy (Ek) = 1/2 * mv², where m is mass and v is velocity.* We are given Ek = 110 J and v = 70 m/s.* Rearranging the formula: m = 2 * Ek / v²* m = 2 * 110 J / (70 m/s)²* m ≈ 0.045 kg45) **D) 8.89 m/s*** Kinetic energy (Ek) = 1/2 * mv²* We are given Ek = 4.50 kJ = 4500 J and m = 114 kg.* Rearranging: v = sqrt(2 * Ek / m)* v = sqrt(2 * 4500 J / 114 kg)* v ≈ 8.89 m/s46) **C) 19.2 J*** Total mechanical energy (E) is the sum of potential energy (Ep) and kinetic energy (Ek).* Ep = mgh = 0.547 kg * 9.8 m/s² * 2.30 m ≈ 12.3 J* Ek = 1/2 * mv² = 1/2 * 0.547 kg * (5.00 m/s)² ≈ 6.84 J* E = Ep + Ek ≈ 12.3 J + 6.84 J ≈ 19.2 J47) **C) 7.00 m/s*** We can use conservation of energy. At the top, all energy is potential (Ep = mgh). Just before hitting the ground, all energy is kinetic (Ek = 1/2 * mv²). Since energy is conserved, Ep = Ek.* mgh = 1/2 * mv² (mass cancels out)* gh = 1/2 * v²* v = sqrt(2gh) = sqrt(2 * 9.8 m/s² * 2.50 m) ≈ 7.00 m/s38) This question number is missing its content. Please provide the question.

Question

Solution

Answer