100 000 times c. 1/10 times [pic] d. 100 times 10. Why are three circles needed to determine the epicenter, as shown in the figure? [pic] [pic] a. If only two circles are used, there are two possible locations. b.
I found that as the mass load was increased the displacement from the reference position increased. After measuring the displacement from the reference position, we studied periods of vibration. We started by suspending 10 g from the mass holder and recording the total weight on the spring (10 g plus the weight of the mass holder). The mass was displaced about 3 cm from its equilibrium position and released. A total of 15 oscillations were counted and the time it took to complete those was measured.
How many kilograms of pure HCl would be used to make this hydrochloric acid? (Assume that 30% has two significant figures. There are 2000 lb/ton.) (Obj 15) 30 ton HCl 2000 lb 1 kg ? kg HCl = 6.0 × 105 ton HCl soln 100 ton HCl soln 1 ton 2.205 lb 30 ton HCl 2000 lb 453.6 g 1 kg ?
What is the final pressure in the drum if the final temperature is 60oC? A. 0.055 MPa B. 2.0 MPa C. 10 MPa D. 55 MPa Problems 35 and 36 are based on the following statement. Ten kilograms of oxygen and 2 kg of hydrogen are mixed in a 1 m3 vessel.
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.
Displace the masses to cause oscillation 5. Measure the time taken for 10 oscillations, therefore get the time for 1 oscillation Set up the experiment as shown below: Results: length | Time | Ball size | 138.5 | 2.48 | S | 45.8 | 1.39 | S | 39.2 | 1.19 | S | 32.5 | 1.2 | M | 42.8 | 1.25 | M | 36.5 | 1.18 | M | 33.4 | 1.15 | M | 26.4 | 0.94 | L | 19.2 | 0.8 | L | 12 | 0.63 | L | Analysis: The graph of pendulum is shown on the page enclosed. The graph of the time taken for 1 oscillation and length of pendulum is a linear graph. The above table shows that time period of a pendulum varies with the length of the pendulum.The time taken for 1 oscillation is calculated by dividing the time for 10 oscillations. Question discussion: Why did we time 10 oscillations of the pendulum?
(F) frequency variable? A 10 minute mile twice 2. (I) intensity variable? 10 minute mile twice with 2 minutes rest in between each. 3.
(4 points) Problem 4: We need 1,000 electric drills per year. The ordering cost for these is $100 per order and the carrying cost is assumed to be 40% of the per unit cost. In orders of less than 120, drills cost $78; for orders of 120 or more, the cost drops to $50 per unit. Should we take advantage of the quantity discount? (4 points) Problem 5: George Heinrich uses 1,500 per year of a certain subassembly that has an annual holding cost of $45 per unit.
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.
Essential Questions: * How will the mass of an object affect the period of a single pendulum swing? * How will the length of the string affect the period of a single pendulum swing? Materials Needed: * String * Set of weights * Weight “bucket” * Tape * Stopwatch (or iPad) * Protractor Hypotheses: In your notebook make 2 hypotheses: 1. How do you think weight will affect the period of a pendulum? 2.