Alexandra and Sal are conducting an experiment to study pendulums. In their first experiment, Alexandra and Sal changed the length of the pendulum and measured its period. In their second experiment, the mass of the pendulum bob was varied, and period was measured. 1. Before running the experiments, Sal hypothesized that increasing the mass of the pendulum would result in an increase in the pendulum's period. Was Sal correct? A. Sal was correct because mass is the only variable that will affect the period of the pendulum. B. Sal was correct because mass and length both affect the period of the pendulum. C. Sal was incorrect because only the length of the pendulum will affect the period of the pendulum. D. Sal was incorrect because only the initial angle will affect the period of the pendulum.

select the statements which is true for momentum. choose all that apply.   A. Momentum is the product of mass and velocity. That means object with huge mass is at rest has no momentum at all.   B. Momentum is only conserved in collisions   C. Momentum is a vector quanity.   D. Momentum is always conserved.

☆ A student is studying simple harmonic motion of a spring. She conducts an experiment where she measures the amplitude and period of an undamped system to be 27+/-1 mm and 0.40 +/-0.020 seconds, respectively. Using the equation for displacement as a function of time y (t) = A cos (wt), what is the uncertainty of her displacement calculation in mm for t 0.050+/-0.0010 seconds? Round your answer to 2 decimal places for entry into Canvas. Do not enter units. Example: 123 Type your answer...

phy.3

The Statue of Liberty in New York City is approximately 305 ft305 ft tall. How many U.S. dimes would be in a stack of the same height? Each dime is 1.35 mm1.35 mm thick. number of dimes:     Each dime has a mass of 2.268 g.2.268 g. How much would the stack of dimes from the previous question weigh? mass:   g What is the value, in dollars, of the same stack of dimes? value:   dollars The 2017 U.S. gross domestic product (GDP) was valued at 19,390,604,000 dollars.19,390,604,000 dollars. How many Statue of Liberty‑height stacks of dimes are needed to match the GDP in value? number of stacks:

In a Millikan experiment, the two forces are assumed to be equal. a. What are these two forces? b. Draw a diagram of forces as these two forces are acting on a drop of oil in equilibrium. c. Briefly explain the principle of this experiment.

Q5: Answer the following: a. Name the two characteristics of vibration analysis. b. Amplitude can be measured by three ways, list them. c. List four conditions that can be determined by vibration analysis. d. Explain the uses and application of x-ray. e. Explain the uses and application of thermo graphic testing.

Your heart beats at 115 beats per minute. What is the period in SI units? seconds

Item 13 Sunspot Observations Sunspots vary in number as a function of time, exhibiting an approximately 11-year cycle. Galileo made the first European observations of sunspots in 1610, and daily observations were begun in Zurich in 1749. At the present time we are well into the 23rd observed cycle. Part A What is the frequency of the sunspot cycle? Give your answer in Hz. Express your answer using two significant figures. ΠΙΑΣΦ f = Submit Provide Feedback Request Answer ? Hz