100. g Al reacts with excess O2 to produce 150. g Al2O3 according to Calculate the theoretical and percentage yield. 4Al + 302 → 2 Al2O3. 79.4 % 14. Calculate the energy produced by the complete reaction of 150. g H2. 2H2 + O2 → 2H2O + 130KJ 4.83 x 103 kJ 15.
At a stimulation frequency of 15 Hz how many stimuli were there per second? 15 per second RESULTS See Table 4: Measurement of Threshold Stimulus See Graph: Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? The stimulus that is just strong enough to depolarize the membrane to threshold. (400mV) 2.
At a stimulation frequency of 15 Hz how many stimuli were there per second? There were 15 stimuli per second. Results Table 4: Measurement of Threshold Stimulus Force (gf)(Motor neuron 1) 100 mV 0 200 mV 0 Voltage (mV) 300 mV 0 400 mV 0.105 500 mV 0.105 Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? The threshold stimulus is 400 mV.
6. At a stimulation frequency of 15 Hz how many stimuli were there per second? 15 pulses per second RESULTS See Table 4: Measurement of Threshold Stimulus See Graph: Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? 400mV 2.
At a stimulation frequency of 15 Hz how many stimuli were there per second? RESULTS See Table 4: Measurement of Threshold Stimulus See Graph: Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? 2. What is the maximum force generated at the threshold stimulus?
LABORATORY REPORT Activity: Recruitment and Isotonic and Isometric Contractions Name: Carolyn Chrzastowski Instructor: Professor Waite Date: 07.19.2015 Predictions When the arm goes from resting to flexing, the amplitude and frequency of sEMG spikes will increase During flexion, the amplitude and frequency of sEMG spikes will ___ during extension. be greater than Recruitment of motor units will be greatest when the load is 20 pounds Materials and Methods Comparison of motor unit activation during muscle tone and concentric and eccentric isotonic contractions Dependent Variable amplitude and frequency of sEMG spikes Independent Variable muscle movement Controlled Variables total number of motor units
328.0 grams o C. 439.0 grams o D. 48000 grams 4. 4. Based on the image, what can you infer about the mass of the object being measured? o A. The mass is exactly 255.0 grams.
A total of 15 oscillations were counted and the time it took to complete those was measured. This was repeated and the average of the two times was taken and divided by the number of oscillations to find the period. The procedure was repeated using masses of 20 g, 30 g, 40 g, 50 g, and 60 g. It was found that as the mass load on the spring increased the period also increased. From the data collected at this point in the experiment, it could be concluded that both period and displacement from the equilibrium position are directly proportional to the mass load on the spring. Following the observation and calculation of the period, the mass load M was plotted against the displacement x with data from the first part of the experiment.
0.4 m = ____4_____ cm Determine the correct metric volume: 4. 1300 mL = ____1.3_____ L 5. 8.01 L = ___8010______ mL Determine the correct metric weight : 6. 0.6 mg = ___600______ mcg 7. 40 mg = ___0.04______ g 8.
Physics Lab Report: Popper Hopper. Purpose: The purpose was to find the speed of a hopper popper as it leaves the table. Materials: The materials used were a timer, ruler and a popper Procedure: I put the popper on the table. When it popped up in the air i looked how high it went up and how long it took. Data: |Trial # | | |4.5 secs |52 cm | |3.1 secs |90 cm | |2.8 secs |84 cm | |1.3 secs |74 cm | |.8 secs |65 cm | Calculations & Data Analysis: Given: mass = .0102 kg, height = .73 m, g= 9.8 m/s Unknown: velocity?