Homework Answers
17. True, microwave has higher frequency than IR
18.Electromagnetic waves produced when electric field oscillate.
19 Transverse wave travel by up and down propagation. These up and downs are called crust and trough respectively.
20. False, Electromagnetic waves travel through any medium and even they can travel in vaccum also.
21. Sound waves are longitudinal
22. When potential is increased its ability do work increased.
23. Potential difference V= IR, hence V=100volt.
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7:35 exam 2.docx Not saved yet 17.) True of False. Microwaves have higher frequency thus shorter...
9:32 Expert Q&A 8.) Raising a car in a service station requires work. Raising it twice...
9:32 Expert Q&A 8.) Raising a car in a service station requires work. Raising it twice as high requires (a)the same amount of work, but twice the power (b)twice the work (c)twice the power (d) b and c only 9.) To bring a supertanker to a stop, its engines are typically cut off about 25km from the port. Why is it so difficult to stop or turn a supertanker? (a)because of its energy (b)because of its inertia (c)because of its...
Indicate whether each item is true or false. If an item is false, please correct it...
Indicate whether each item is true or false. If an item is false, please correct it so that it is true. Speed is a scalar quantity. Work and energy are vector quantities. Objects that are not moving cannot have any work done to them. Pressure is uniform throughout a fluid, regardless of depth Density of a material changes as the temperature of the material changes. Solids are always more dense than liquids. Liquids are always more dense than gases Falling...
m= H: 10 f Du 11 Two equal and opposite forces of 3 N have a...
m= H: 10 f Du 11 Two equal and opposite forces of 3 N have a net force of A9N B6N c3N DON Which of the following is NOT a constant for an object in uniform circular motion! A distance with time speed e velocity D acceleration magnitude Work is A energy times distance. B force times distance. c force times time. D momentum times distance. You push against Plymouth Rock with a force of 100 newtons for 20.0 seconds....
HELP PLEASE! Quiz#4 Name: 1). Energy is defined as an ability of doing work a) True b) False c) Can's say 2). 1 Jule of...
HELP PLEASE!
Quiz#4 Name: 1). Energy is defined as an ability of doing work a) True b) False c) Can's say 2). 1 Jule of energy corresponds to the work done a) 1 Nm b) 3 Nm c) 5 Nm 3). According to physics, does the earth do any work on moon a) No c) Can't say b) Yes 4). When we drop an object from a maximum height, initial kinetic energy is zero a) True b) False c) Undetermined...
Problem 1 A 0.150 kg baseball pitched at 40.0 m/s is hit on a horizontal line...
Problem 1 A 0.150 kg baseball pitched at 40.0 m/s is hit on a horizontal line drive straight back at the pitcher at 50.0 m/s. a) If the contact time between bat and ball is 3.90×10−3 s, calculate the magnitude of the force (assumed to be constant) between the ball and bat. b) Determine the direction of the force exerted on a ball. Problem 2 Indicate whether the following statements are true for both inelastic collisions and elastic collisions. a)...
True or False In 900 K there is lower quality of energy (useful energy) than in...
True or False In 900 K there is lower quality of energy (useful energy) than in 300 J of work. A thermodynamic motor absorbs energy from a hot tank and converts a percentage of it into work. Choose the best answer 1. If the volume of an ideal gas doubles while its temperature quadruples, the pressure ... A. stays the same. C. decreases by half. B. increases by a factor of 4. D. doubles. 2. If the radius of a...
A 1000-kg car and a 2000-kg are to the same height. Raising the more massive car...
A 1000-kg car and a 2000-kg are to the same height. Raising the more massive car requires A) twice as much work B) more than four times as reach work. C) four times as much work. D) less work. E) as much work. At one instant are object in free fall is moving downward at 50 m/s. One second later its speed is A) 50 m/s. B) 100 m/s C) 55 m/s D) 25 m/s E) 60 m/s Which of...
Linear Momentum of an object is conserved At all times b. Only when the net external...
Linear Momentum of an object is conserved At all times b. Only when the net external force on the object is Zero When the net external torque on the object is Zero d. Never A truck of mass 4000 (kg) is moving at 10 (m/s). A car of mass 1000 (kg) is moving at 40 (m/s). So, the truck’s momentum, compared to the car, is Greater b. Smaller c. the same d. Cannot say without knowing their accelerations A 1000...
ms H: 10 42 11 Two equal and opposite forces of 3 N have a netforce...
ms H: 10 42 11 Two equal and opposite forces of 3 N have a netforce of A9N B6N c3N DON Which of the following is NOT a constant for an object in uniform circular motion! A distance with time speed e velocity D acceleration magnitude Work is A energy times distance, B force times distance. c force times time. D momentum times distance. You push against Plymouth Rock with a force of 100 newtons for 20.0 seconds. If the...
answers pls 1. Determine whether the statements below are true or false: a. [4 points) Two...
answers pls
1. Determine whether the statements below are true or false: a. [4 points) Two carts move in the same direction along a frictionless track, each acted upon by the same constant impulse. If Cart 1 has the twice the mass of Cart 2, then Cart 2 will have the greater change in linear momentum. b. [4 points) Any force component that causes a centripetal acceleration cannot change the translational kinetic energy of the object. c. [4 points) A...
9:32 Expert Q&A 8.) Raising a car in a service station requires work. Raising it twice as high requires (a)the same amount of work, but twice the power (b)twice the work (c)twice the power (d) b and c only 9.) To bring a supertanker to a stop, its engines are typically cut off about 25km from the port. Why is it so difficult to stop or turn a supertanker? (a)because of its energy (b)because of its inertia (c)because of its...
m= H: 10 f Du 11 Two equal and opposite forces of 3 N have a net force of A9N B6N c3N DON Which of the following is NOT a constant for an object in uniform circular motion! A distance with time speed e velocity D acceleration magnitude Work is A energy times distance. B force times distance. c force times time. D momentum times distance. You push against Plymouth Rock with a force of 100 newtons for 20.0 seconds....
HELP PLEASE!
Quiz#4 Name: 1). Energy is defined as an ability of doing work a) True b) False c) Can's say 2). 1 Jule of energy corresponds to the work done a) 1 Nm b) 3 Nm c) 5 Nm 3). According to physics, does the earth do any work on moon a) No c) Can't say b) Yes 4). When we drop an object from a maximum height, initial kinetic energy is zero a) True b) False c) Undetermined...
A 1000-kg car and a 2000-kg are to the same height. Raising the more massive car requires A) twice as much work B) more than four times as reach work. C) four times as much work. D) less work. E) as much work. At one instant are object in free fall is moving downward at 50 m/s. One second later its speed is A) 50 m/s. B) 100 m/s C) 55 m/s D) 25 m/s E) 60 m/s Which of...
ms H: 10 42 11 Two equal and opposite forces of 3 N have a netforce of A9N B6N c3N DON Which of the following is NOT a constant for an object in uniform circular motion! A distance with time speed e velocity D acceleration magnitude Work is A energy times distance, B force times distance. c force times time. D momentum times distance. You push against Plymouth Rock with a force of 100 newtons for 20.0 seconds. If the...
answers pls
1. Determine whether the statements below are true or false: a. [4 points) Two carts move in the same direction along a frictionless track, each acted upon by the same constant impulse. If Cart 1 has the twice the mass of Cart 2, then Cart 2 will have the greater change in linear momentum. b. [4 points) Any force component that causes a centripetal acceleration cannot change the translational kinetic energy of the object. c. [4 points) A...
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