1 answer

A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 760-kg helicopter rises from rest to a speed of 10.0 m/s in a time of 5.0 s. During this time it climbs to a height of 8.9 m. What is the average power generated by the lifting force?

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (*m* = 75.0 kg) is 6.50 W per kilogram of his body mass. **(a)** How much work does he do during a 187-km race in which his average speed is 11.2 m/s? **(b)** Often, the work done is expressed in nutritional Calories rather than in joules. Express the work done in part (a) in terms of nutritional Calories, noting that 1 joule = 2.389 x 10^{-4} nutritional Calories.

1 answer
#####
You have a lump of copper with a mass of 1.8 grams. Copper is ductile so...

You have a lump of copper with a mass of 1.8 grams. Copper is ductile so you can draw it into a cylindrical wire. You draw it into a wire with length L and diameter D so that it has a resistance of 2Ω. What is the length of the wire in m and the diameter in mm? Hint: you may need to look up so...

1 answer
#####
A company has the following account balances at the end of the year: • Credit Sales...

A company has the following account balances at the end of the year: • Credit Sales = $400,000 • Accounts receivable = $80,000 • Allowance for Uncollectible Accounts = $400 debit The company estimates future uncollectible accounts to be 4% of accounts receivable. At what amount would ...

1 answer
#####
Was having a hard time figuring out the financial reporting issues , user need and environment....

was having a hard time figuring out the financial reporting issues , user need and environment. please guide me . context in financial reporting issues identified. i have only identified the lawsuit issue and amortization timeline of trademark. JU U Tuled. NG "CIES Integrated Cases (Hint: If...

1 answer
#####
1. Match the following distributed loads with the proper shear and moment diagrams. W V A...

1. Match the following distributed loads with the proper shear and moment diagrams. W V A W 1 Shear V R Moment V wa Shear M B 2 X Moment M R R V CRA 3 1 Shear M V Moment V Shear D 4 + Z MA VA R R Moment...

1 answer
#####
A package contains 12 resistors, 3 of which are defective. if 5 are selected find the...

a package contains 12 resistors, 3 of which are defective. if 5 are selected find the probability of getting the following results 1 defective...

1 answer
#####
8.17 Determine which of the cubic graphs Gı,G2 and Ga in Figure 8.18 (a) has a...

8.17 Determine which of the cubic graphs Gı,G2 and Ga in Figure 8.18 (a) has a 1-factor (b) is 1-factorable. G2: Ga: Figure 8.18: The graphs in Exercise 8.17...

1 answer
#####
Static friction

An 840-kg race car can drive around an unbanked turn at a maximum speed of 59 m/s without slipping. The turn has a radius of curvature of 155 m. Air flowing over thecar's wing exerts a downward-pointing force (called the downforce) of 3200 N on the car.(a) What is the coefficient of static frict...

1 answer
#####
For the following set of cash flows, Year Cash Flow 0 –$7,000 1 6,500 2 3,700...

For the following set of cash flows, Year Cash Flow 0 –$7,000 1 6,500 2 3,700 3 3,100 a. What is the NPV at a discount rate of 0 percent? b. What is the NPV at a discount rate of 11 percent? c. What is the NPV at a discount rate of 19 percent? d. What is the NPV at a discount rate of 24 percen...

1 answer
#####
5.5 The shape and surface texture of aggregate particles are important for both portland cement concrete...

5.5 The shape and surface texture of aggregate particles are important for both portland cement concrete and asphalt concrete. a. For preparing PCC, would you prefer round and smooth aggregate or rough and angular aggregate? Briefly explain why (no more than two lines). b. For preparing HMA, would y...

1 answer
#####
Based on the data on the fist page, how do you calculate #1 and #2? Report...

Based on the data on the fist page, how do you calculate #1 and #2? Report Data Trial LA. Cell Potential 0.26. 24 LB, Cell Potential for Zn Zn2+ Cu2. Cu LC. Cell Potential for Mg Mg?' I IZnlzn2. Trial II.A. Cell Potential for Fe Fe2 Cu2. Cu II.B. Cell Potential for MgIMg2 Fe 'I Fe II.C. ...

1 answer
#####
Calculate the e u libriumnum stracancies for alsm of a metal with FCC structure at 800...

Calculate the e u libriumnum stracancies for alsm of a metal with FCC structure at 800 "C. Given that the energy for vacancy formation is 1.leV/atom, the atomic weight is 1079 gmol, the atomic radius is 0.144x10 mm and Bolomann's constant is 8.62 x10 eV/atom K Wes...

1 answer
#####
What is the name of the quadrilateral with 2 pairs of equal sides and 2 pairs of opposite angles that are equal?

This question is from hill intermediate school for 3rd graders...

1 answer
#####
Question 10: Assume a regression prediction takes the following form: Wages = 607.3 + 3.85Age -0.0423Age2...

Question 10: Assume a regression prediction takes the following form: Wages = 607.3 + 3.85Age -0.0423Age2 What is the value for Age at the maximum of this prediction? (Hint: you can use something you saw in calculus to do it fast or you can waste time trying it out with numbers in excel). A) 29.38 B...

1 answer
#####
Question 21 2 pts A sample of a monatomic ideal gas is originally at 30 °C....

Question 21 2 pts A sample of a monatomic ideal gas is originally at 30 °C. What is the final temperature of the gas if the pressure is doubled and volume is reduced to one-fourth its initial value? O -130°C O -127oc O 15 °C O 130 °C...

1 answer
#####
Of the choices below, why is protein synthesis an attractive target for the development of antibiotics?...

Of the choices below, why is protein synthesis an attractive target for the development of antibiotics? Proteins perform virtually every function of a cell, serving as both functional and structural elements, thus messing with their synthesis would lead to cell death O Protein synthesis is not typic...

1 answer
#####
#include <stdio.h> // Define other functions here to process the filled array: average, max, min, sort,...

#include <stdio.h> // Define other functions here to process the filled array: average, max, min, sort, search // Define computeAvg here // Define findMax here // Define findMin here // Define selectionSort here ( copy from zyBooks 11.6.1 ) // Define binarySearch here int main(void...

1 answer
#####
Enodic Table The magnesium and calcium ions present in seawater ([Mg2+] = 0.059 M and (Ca2+]...

enodic Table The magnesium and calcium ions present in seawater ([Mg2+] = 0.059 M and (Ca2+] = 0.011 M) can be separated by selective precipitation with КОН. You may want to reference (Pages 775 - 778) Section 17.6 while completing this problem. Part A If the concentration of Mg2+ ...