Child pulls a wagon with a force
A child pulls a wagon with a force of 10 N by a handle making an angle of 19 degrees with the horizontal. If the wagon has a mass of 5.7 kg, to the nearest hundredth of a m/s2 what is the acceleration of the wagon?
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We wish to estimate the prevalence of asthma at a large school of 2850 children. We think it will be around 25% and want a sample size that allows the 99% confidence limits to be within 5% of our final estimate.
The capacitor in an RC circuit (R = 180 O, C = 69 µF) is initially uncharged. Find the charge on the capacitor and the current in the circuit one time constant (t = RC) after the circuit is connected to a 9.0-V battery.
A research wants to study the amount of money spent on food among undergraduate students and undergraduate student athletes. Select the following statement that represents the null hypothesis.
The principle sources of this radioactivity were 137Cs (half-life of 30.2 yr) at 156 Ci/cm3 and 134Cs (half-life of 2.06 yr) at 26 Ci/cm3. How many atoms per cm3 of each of these radionuclides were in the water at that time?
1.What is the standard error sm? 2. What is the value of the t statistic? 3. What is the critical t value? 4. Would you reject or retain the null hypotheses?
Determine the load required to compress the specimen to a height of (a) 62 mm and (b) 58 mm assuming that the cross section increases uniformly.
The diameter of the circle in which the discus moves is about 2.26 m. If the thrower takes 1.32 s to complete one revolution, starting from rest, what will be the speed of the discus at release?
Six parallel-plate capacitors of identical plate separation have different plate areas A, different capacitances C, and different dielectrics filling the space between the plates. Below is a generic diagram of what each one of these capacitors mig
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