Physics Rotational Mechanics Level: University
TorqueA cylinder whose axis is fixed has a string wrapped around it that is pulled with a force equal to the cylinders weight. Show that the acceleration of the string is equal to 2g.
Physics Rotational Mechanics Level: University
EquationA circular saw rotating at 15 rev/s is brought to a stop in 125 revolutions. How much time did it take?
Physics Rotational Mechanics Level: University
Rotational MotionThe propeller of a boat rotates at 100rad/s when the speed of the of the boat is 6m/s. The diameter of the propeller is 40 cm. What is the speed of the tip of the propeller?
Physics Force & Laws Of Motion Level: University
Equation of MotionA carnival ride carries passengers in a circular path with a radious of 7.7 meters. The ride makes a complete rotation every 4 seconds . (a) What is the passengers angular velocity due to circular motion? (b) What is the acceleration does the passenger experience? answer for these questions (a) 1.6 rad/ (b) 19m/s^2
Physics Force & Laws Of Motion Level: University
TorqueA sign weighing 400 N is suspended at the end of a 350 N uniform rod.
a. What is the tension in the support cable if it makes an angle of 35 degrees with the rod.
b. What would be the tension in cable if the angle were changed to 55 degrees Answers for these questions a) T = 1000N) T= 700N.
Physics Misc Topic Level: University
Since the energy field (E) is directed upward I took this to say that the surround charges are positive and the charges above the could are negative. I got the same answer when I worked the problem but thought the negative force value meant the force was directed downward.
Physics Misc Topic Level: University
I got an answer of .28 x 10 - 11 N using a method identical to yours. I tried to find a math error with my work but everything came up clean. Just wondering if you could see anything on this.
Physics Misc Topic Level: University
I was multipling the total number of electrons by 99/100 instead of 1/100. The question asked about the golden losing 1 persent of its electrons so I figured that 99 persent were remaining. Is my thinking off with that one?
Physics Misc Topic Level: University
Q point is refered to in my text book as derived from the word quiescent which means still or unvarying. Its on the graph of a diode with ac current It also goes on to say in my text with no applied varying signal the point of operation would be the Q-point determined by the applied dc levels. Jerome
Physics Misc Topic Level: University
Some students marks are recorded for an assignment. The lecturer wanted to see how well the group had done so she asked them to represent the data as abar chart. She advised the students to construct a grouped frequency table by putting the markes into class intervals of 10 marks width between 1 and 6023 28 50 35 38 56 55 34 46 19
27 29 42 56 37 42 36 29 16 40
24 38 45 36 40 34 35 35 39 57
a. Draw a grouped frequency table to show the frequency distribution of the data
b. Draw a bar chart to represent the data
c. Identify the mid - interval values and extend your table so that you can determine the mean of the marks.
d. What percentage f the students obtained a mark of over 40 persent
e. Arrange the data in a suitable way to obtain the mode and median of the marks.
Physics Misc Topic Level: University
Write your own date of birth down in the form 09/06/85 you are going to use these 3 numbers as the data for this question.
(a) Create a table to show you can represent these three numbers as segments of a pie-chart.
(b) Draw and label a pie-chart representing the numbers that correspond to the day the month and the year to the nearest degree.
Physics Electrostatics Level: University
Collombs LawOn planet Tehar the acceleration of gravity is the same as that on Earth but three is also a strong downward electric field with the field being unifon planet's surface A 1.70 kg ball having a charge of 4.40 uC thrown upward at a speed of 21.4 m/s and it hits the ground after an interval of 3.84s. WI difference between the starting point and the top point of the trajectory?
Physics Electrostatics Level: University
Electric FieldTwo charge parallel plates create a uniform electric field of 3 N/C between the plates. The left plate is positive and the right plate is negative. Sev been identified in this region and are labelled in the figure.
Which of the following statements are true about the static electrical properties ( E field potential etc) of the case depicted in the figure above?
(Give ALL correct answer B. AC. BCD.... or None)
(a) The electric field at N is zero
(b) An electron placed at M would feel a greater magnitude of electric force as compared to a proton at M
(c) The potential difference between P and M is non-zero
(d) Equipotential surfaces form planes that are perpendicular to the plates.
(e) The electric field at P is equal to the electric field at N
Question Diagram
Physics Electrostatics Level: University
PotentialAn electron from starts rest 70.6 cm from a fixed point charge with Q = -0.146uC. How fast will the electron be moving when it is very far away?
Physics Electrostatics Level: University
PotentialFind the potential at point P for the rectangular grouping of charges (q1 =-8.54 uC q2 = 11.9 uC q3 = 8.54 uC L1= 0.150m and L2 = 0.363m) as below.
Question Diagram
