Experiments Questions and Answers

Which statement best describes how the black spectrum of the car horn when it is stationary compares to the red spectrum of the car horn when it is moving away from the recording equipment? Select all that apply: When the car is approaching the recording equipment, the red spectrum is shifted to the right compared to when the car horn is stationary. When the car is approaching the recording equipment, the red spectrum is not shifted compared to when the car horn is stationary. When the car is approaching the recording equipment, the red spectrum is shifted to the left compared to when the car horn is stationary.

Which statement best describes how the black spectrum of the car horn when it is stationary compares to the red spectrum of the car horn when it is approaching the recording equipment? When the car is approaching the recording equipment, the red spectrum is shifted to the right compared to when the car horn is stationary. When the car is approaching the recording equipment, the red spectrum is not shifted compared to when the car horn is stationary. When the car is approaching the recording equipment, the red spectrum is shifted to the left compared to when the car horn is stationary.

Calculate: A year is the time it takes a planet to complete one orbit. Use your data to estimate the Year length for each planet. Use time units of Earth years or Earth months. Why does it take the outer planets so long to orbit the Sun? Try to come up with 2 reasons.

Using data starting with 1950 and projected to 2050, the number of women (in millions) in the workforce is given by the function P = 0.79x+20.86, where x equals the number of years after 1950. (a) Find the value of P when x=61. Explain what this means. (b) What value of x represents 2020? Use the model to find the number of women in the workforce in 2020. (a) The value of P when x=61 is __ million. (Type an integer or decimal rounded to two decimal places as needed.) What is the meaning of this value of P? A. The value of P represents the number of women who will join the work force between the years 1950 and 2011. B. The value of P represents the number of women in the workforce in the year 1961. C. The value of P represents the number of women who will join the work force between the years 1900 and 1961. D. The value of P represents the number of women in the workforce in the year 2011. (b) The value of x that represents 2020 is x = The number of women in the workforce in 2020 will be million. (Type an integer or decimal rounded to two decimal places as needed.).

A rock is ejected from a volcano with a velocity of 35 m/s at an angle of 45 degrees with the horizontal. The rock strikes the side of the volcano 30.0 m lower than it started from. Neglect the air resistance. a. Calculate the time it takes the rock to follow this path. b. How far from the base of the volcano will the rock strike the ground?

Which of the following is NOT taught to children in anger management programs? How to control inappropriate behavior How to eliminate anger How to recognize emotions that trigger anger How to evaluate emotional situations accurately

Which statement describes a characteristic of an experimental design that will improve the quality of the results? A. It has more than one manipulated variable. B. It involves a procedure that is complex. C. It has a small sample size of test subjects. D. It has a single responding variable.

Suppose the temperature is 75 °F at NYC and 60 °F at Boston, 240 miles away. Suppose the wind is blowing directly from NYC towards Boston at 16 mph. Suppose further that the vertical turbulent heat flux is as follows at Boston: Height above ground 1000m 500 m surface Flux -0.04 Km/s +0.01 Km/s +0.06 Km/s What will the new temperature be at Boston if these conditions continue for 1 hour? What kind of boundary layer would this be? Make whatever reasonable assumptions you need to, and be sure and explain your work. Watch out for units!! If the wind were blowing from Boston to NYC (the opposite direction), with everything else the same, what would your answer be? What kind of boundary layer would this be now?

What is the result of 1.58 ÷ 3.793 written with the correct number of significant figures? 4.166 x 10-1 O 4.1656 x 10-1 O 4.2 x 10-1 O4 x 10-1 O 4.17 x 10-1

3. What is the Joly photometer made of? Two pieces of plastic and tinfoil. Two pieces of glass and tinfoil. Two blocks of paraffin wax and tinfoil. Two blocks of salt and tinfoil.

Which of these is way that the newer generation of immigrants tried to make their transition to life in a new nation easier? a Moving to rural areas to escape nativism b Forming their own political parties to advocate for their rights c Abandoning their culture in order to become true Americans d Settling in urban ethnic enclaves

An auditorium has dimensions 37 m x 15 m x 39 m. How many molecules of air fill the auditorium at 40 °C and pressure of 100 kPa? Assume air is an ideal gas. Note: Write the unit: molecules

How did the decision to strike most impact the city? A. Some union workers lost their jobs. B. Some parents were inconvenienced. c. Thousands of students had trouble getting to school. D. The strike earned national attentionl

How do two bits of unrubbed paper interact? If we were to assume that the behavior of unrubbed paper is due to the presence of a third charge, would the behavior of this third charge be consistent with thebehavior of A and B?

The specific heat capacity of aluminum is 0.22cal/g °C, How close was your experimental value to the theoretical value? Provide at least two sources of error as if you performed this lab in person.

A scientist monitors the number of eggs in five duck nests in parks, five duck nests in zoos, and five duck nests in the wild during the spring and summer for three years. He makes a multiple line graph to plot and compare data for the three locations. Which question describes what the scientist is most likely testing? (A)How many eggs do ducks usually lay? (B)What color of ducks lays the most eggs? (C)What setting is best for producing the most eggs? (D)Where is the safest place to raise ducks?