1) Which takes more work, slowing a car from 100km/h to 70km/h, or 70km/h to 0?...

1) Which takes more work, slowing a car from 100km/h to 70km/h, or 70km/h to 0?

2) A 0.2kg falcon flies at 50m/s toward a 0.01kg shrew moving at 0.2m/s away from the falcon. What is the total kinetic energy of the falcon-shrew system?

Expert Solution

genius_generous answered 7 months ago

A race car driver tested his car for the time it takes to go from 0...

A race car driver tested his car for the time it takes to go from 0 to 60 mph, and for 20 tests obtained a mean of 4.85 seconds with a standard deviation of 1.47 seconds. These times are known to be normally distributed. What is the value of t used to construct a 95% confidence interval for the mean time it takes the car to go from 0 to 60? Round your answer to 2 decimal places.

Work out the distance of the point [1, 0, 0, 0] from the subspace W =...

Work out the distance of the point [1, 0, 0, 0] from the subspace W = ker T, where T : R 4 → R 2 is the linear map with matrix A = {(1,2,2,0), (2,1,3,1)}

Which of the following had the job of slowing conduction of the impulses from the atria...

Which of the following had the job of slowing conduction of the impulses from the atria to the atria to contract and empty their blood volume into the ventricles?

1) Define a sequence of polynomials H n (x ) by H 0 (x )=1, H...

1) Define a sequence of polynomials H n (x ) by H 0 (x )=1, H 1 (x )=2 x , and for n>1 by H n+1 (x )=2 x H n (x )−2 n H n−1 (x ) . These polynomials are called Hermite polynomials of degree n. Calculate the first 7 Hermite polynomials of degree less than 7. You can check your results by comparing them to the list of Hermite polynomials on wikipedia (physicist's Hermite polynomials). 2)...

More and more adults are considering commuting to work by bicycle rather than car, but few...

More and more adults are considering commuting to work by bicycle rather than car, but few bicycles currently on the market have been designed with the commuter's needs in mind. Imagine that you are a marketing executive for a bicycle manufacturer who wants to enter this potentially expanding market with a new lightweight, easy-to-store bike with safety features that combines the speed of a road bike and the sturdiness of a mountain bike. You have moved through most of the...

Consider the hypothesis test below. H 0: p 1 - p 2 0 H a: p 1 - p 2 >...

Consider the hypothesis test below. H 0: p 1 - p 2 0 H a: p 1 - p 2 > 0 The following results are for independent samples taken from the two populations. Sample 1 Sample 2 n1 = 100 n2 = 300 p1 = 0.24 p2 = 0.13 Use pooled estimator of p. What is the value of the test statistic (to 2 decimals)? What is the p-value (to 4 decimals)? With = .05, what is your hypothesis testing conclusion?

1. Nitrogen (N) is more electronegative than hydrogen (H). Which of the following is a correct...

1. Nitrogen (N) is more electronegative than hydrogen (H). Which of the following is a correct statement about the atoms in ammonia (NH3)? A. There are covalent bonds between the hydrogen atoms and polar bonds between each hydrogen atom and the nitrogen atom. B. Ammonia has an overall negative charge. C. The nitrogen atom has a partial positive charge; each hydrogen atom has a partial negative charge. D. Ammonia has an overall positive charge. E. Each hydrogen atom has a...

(1) default constructor which initalizes all the coefficients to 0 (2) a constructor that takes three...

(1) default constructor which initalizes all the coefficients to 0 (2) a constructor that takes three parameters public QuadraticExpression(double a, double b, double c) (3) a toString() method that returns the expression as a string. (4) evaluate method that returns the value of the expression at x public double evaluate(double x) (5) set method of a, b, c public void setA(double newA) public void setB(double newB) public void setC(double newC) (6) public static QuadraticExpression scale( double r, QuadraticExpression q) returns...

(2pt) A variable that takes on the values of 0 or 1 and is used to...

(2pt) A variable that takes on the values of 0 or 1 and is used to incorporate the effect of categorical variables in a regression model is called a. a constant variable b. a dummy variable c. an interaction d. None of these alternatives are correct. (1pt) The model y= β0+β1x1+β2x12+ε is called a. First-order model with one predictor variable b. Second-order model with two predictor variables c. Second-order model with one predictor variable d. None of these alternatives is...

A roller-coaster car is starting from rest from the top of the slope of height H....

A roller-coaster car is starting from rest from the top of the slope of height H. As it reaches the bottom of the slope, it is moving at 30 m/s along a straight horizontal track. Using the principle of conservation of energy, a. Calculate the height H. b. Calculate the speed of the roller-coaster car after climbing the 10 m hill shown in the figure. Ignore friction. c. What is the change in kinetic energy as the car goes a....

Question