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Question Completion Status: QUESTION 1 What power is needed to lift a 40 kg student a...
D Question 2 2 pts A donkey pulls a crate up a rough, inclined plane at...
D Question 2 2 pts A donkey pulls a crate up a rough, inclined plane at constant speed. Which one of the following statements concerning this situation is true? The gravitational potential energy of the crate is increasing. O The donkey does "negative" work in pulling the crate up the incline. The work done on the crate by the normal force of the plane is not zero joules. The work done on the object by gravity is zero joules. Two...
Question Completion Status: A charge q is entering the region between the plates of a capacitor...
Question Completion Status: A charge q is entering the region between the plates of a capacitor with a velocity v 600 m/s, parallel to the plates of the capacitor as shown. The whole arrangement of the figure is in a region with magnetic field, B, perpendicular to the page. What is the magnitude and the direction of the magnetic field B, so that the charge goes through the capacitor undeflected? (Hint: the net force on the charge is zero). The...
Question Completion Status: QUESTION 2 What is the acceleration of an object sitting at the top...
Question Completion Status: QUESTION 2 What is the acceleration of an object sitting at the top of a 15 m tall building? Ob. 10 m/s2 Co 15 m/s2 d.5.2 m/s2 e. 24.8 m/s2 QUESTION 3 What is the speed of an object thrown straight up with an initial velocity of 100 m/s after eight seconds. a. O m/s b.20 m/s c. 40 m/s d. 60 m/s e. None of these QUESTION 4 At one instant an object in free fail...
how do u do 3 QUESTION 3 A girl throws a stone from a bridge. Consider...
how do u do 3
QUESTION 3 A girl throws a stone from a bridge. Consider the following ways she might throw the stone. The speed of the stone as it leaves her hand is the same in each case Case A Thrown straight up Case B: Thrown straight down Case C Thrown out at an angle of 45° above horizontal Case D: Thrown straight out horizontally In which case will the speed of the stone be greatest when it...
QUESTION 5 A slingshot will shoot a 69-g pebble at a speed of 7.5 m/s. If...
QUESTION 5 A slingshot will shoot a 69-g pebble at a speed of 7.5 m/s. If the rubber bands have a force constant of 2 66 Nm, then how far were the rubber bands stretched? Express your answer to 1decimal place Click Save and Submit to save and submit. Click Save All Answers to save all answers.
You are using a rope to lift a 14.5 kg crate of fruit. Initially you are...
You are using a rope to lift a 14.5 kg crate of fruit. Initially you are lifting the crate at 0.500 m/s. You then increase the tension in the rope to 190 N and lift the Grate an additional 1.15 m. During this d motion, how much work is done on the crate by the tension force? Express your answer with the appropriate units ! Å * OO? W Value Units Submit Request Answer Part D Find the work done...
fOne question but divided into sub connected questions * Question Completion Status: QUESTION 1 20 points...
fOne question but divided into sub connected
questions
* Question Completion Status: QUESTION 1 20 points Save Ans The heat-pump system shown is designed to provide water-heating and space-cooling. The system includes a heat exchanger to subcool the R134a refrigerant at the outlet of the water heater while heating the refrigerant at the outlet of the evaporator. Given the following data, determine the enthalpy at each station, 1 through 6, using the R134a property tables (click here). Type your answers...
Use any concepts you've learned about to answer this question. A ball of mass m =...
Use any concepts you've learned about to answer this question. A ball of mass m = 0.5 kg moves around in a circle of radius r = 2 meters, at speed [v] = 1 m/s. a) What is the centripetal acceleration, ac, in m/s2? b) What is the work done by the force of tension in Joules, on the ball, if it has moved by half the circle? c) What is the kinetic energy of the ball, in Joules?
Question Completion Status: QUESTION 1 In the figure below, a disk of radius R rolls on the horiz...
i
dont know how to do questions 1-6
Question Completion Status: QUESTION 1 In the figure below, a disk of radius R rolls on the horizontal surface as a small disk slides through a slot of radius r milled into the larger disk. At the instant shown: e the centers of the large disk and the slot milled into the disk are coincident with O; the point at which rolling contact occurs is coincident with B directly below O; the...
Question completion Status QUESTION 1 A piston cylinder device contain: 0.8 kg of steam at 250°C...
Question completion Status QUESTION 1 A piston cylinder device contain: 0.8 kg of steam at 250°C and 1 MPa (1 Mpa 1000 kPa). Steam is cooled at constant pssure until one half of the mass conden: a. What is the mass of vapour in the mixture and the value of quality x of the mixture b. Use the tables to find the initial specific volume vi and initial volume V1 cFind the value of the final volume V2 after condensation...
D Question 2 2 pts A donkey pulls a crate up a rough, inclined plane at constant speed. Which one of the following statements concerning this situation is true? The gravitational potential energy of the crate is increasing. O The donkey does "negative" work in pulling the crate up the incline. The work done on the crate by the normal force of the plane is not zero joules. The work done on the object by gravity is zero joules. Two...
Question Completion Status: A charge q is entering the region between the plates of a capacitor with a velocity v 600 m/s, parallel to the plates of the capacitor as shown. The whole arrangement of the figure is in a region with magnetic field, B, perpendicular to the page. What is the magnitude and the direction of the magnetic field B, so that the charge goes through the capacitor undeflected? (Hint: the net force on the charge is zero). The...
Question Completion Status: QUESTION 2 What is the acceleration of an object sitting at the top of a 15 m tall building? Ob. 10 m/s2 Co 15 m/s2 d.5.2 m/s2 e. 24.8 m/s2 QUESTION 3 What is the speed of an object thrown straight up with an initial velocity of 100 m/s after eight seconds. a. O m/s b.20 m/s c. 40 m/s d. 60 m/s e. None of these QUESTION 4 At one instant an object in free fail...
how do u do 3
QUESTION 3 A girl throws a stone from a bridge. Consider the following ways she might throw the stone. The speed of the stone as it leaves her hand is the same in each case Case A Thrown straight up Case B: Thrown straight down Case C Thrown out at an angle of 45° above horizontal Case D: Thrown straight out horizontally In which case will the speed of the stone be greatest when it...
QUESTION 5 A slingshot will shoot a 69-g pebble at a speed of 7.5 m/s. If the rubber bands have a force constant of 2 66 Nm, then how far were the rubber bands stretched? Express your answer to 1decimal place Click Save and Submit to save and submit. Click Save All Answers to save all answers.
You are using a rope to lift a 14.5 kg crate of fruit. Initially you are lifting the crate at 0.500 m/s. You then increase the tension in the rope to 190 N and lift the Grate an additional 1.15 m. During this d motion, how much work is done on the crate by the tension force? Express your answer with the appropriate units ! Å * OO? W Value Units Submit Request Answer Part D Find the work done...
fOne question but divided into sub connected
questions
* Question Completion Status: QUESTION 1 20 points Save Ans The heat-pump system shown is designed to provide water-heating and space-cooling. The system includes a heat exchanger to subcool the R134a refrigerant at the outlet of the water heater while heating the refrigerant at the outlet of the evaporator. Given the following data, determine the enthalpy at each station, 1 through 6, using the R134a property tables (click here). Type your answers...
Use any concepts you've learned about to answer this question. A ball of mass m = 0.5 kg moves around in a circle of radius r = 2 meters, at speed [v] = 1 m/s. a) What is the centripetal acceleration, ac, in m/s2? b) What is the work done by the force of tension in Joules, on the ball, if it has moved by half the circle? c) What is the kinetic energy of the ball, in Joules?
i
dont know how to do questions 1-6
Question Completion Status: QUESTION 1 In the figure below, a disk of radius R rolls on the horizontal surface as a small disk slides through a slot of radius r milled into the larger disk. At the instant shown: e the centers of the large disk and the slot milled into the disk are coincident with O; the point at which rolling contact occurs is coincident with B directly below O; the...
Question completion Status QUESTION 1 A piston cylinder device contain: 0.8 kg of steam at 250°C and 1 MPa (1 Mpa 1000 kPa). Steam is cooled at constant pssure until one half of the mass conden: a. What is the mass of vapour in the mixture and the value of quality x of the mixture b. Use the tables to find the initial specific volume vi and initial volume V1 cFind the value of the final volume V2 after condensation...
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