A police car sounding a siren with a frequency of 1550 Hz is traveling at 130 km/h .

What frequencies does an observer standing next to the road hear as the car approaches? As it recedes?

What frequencies are heard in a car traveling at 90.0 km/h in the opposite direction before and after passing the police car? For both approaching and receding

The police car passes a car traveling in the same direction at 80.0 km/h. What two frequencies are heard in this car? For both approaching and receding

A steam thermoelectric plant operates a Rankine cycle with overheating. Water enters the pump as saturated liquid , 7.7 kg/s. The efficiency of the pump is 0.9 The water enters the high pression turbine at 12 500 kPa and 550°C, after that steam overheats at a constant pressure of 2000 kPa until 450°C before it expands on the low pressure turbine. The efficiency of both turbines is 0.85. The vapor quality when it enters to the condenser is 0.95 Determine the thermal efficiency of the cycle.

A graduated cylinder is filled to the 40.00−mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966 g and 159.446 g, respectively. In a separate experiment, a metal ball bearing of mass 21.867 g is placed in the cylinder and the cylinder is again filled to the 40.00−mL mark with the mineral oil. The combined mass of the ball bearing and mineral oil is 50.952 g. Calculate the density and radius of the ball bearing (volume of a sphere of radius r is 4/3πr3).

A graduated cylinder is filled to the 40.00−mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966 g and 159.446 g, respectively. In a separate experiment, a metal ball bearing of mass 21.867 g is placed in the cylinder and the cylinder is again filled to the 40.00−mL mark with the mineral oil. The combined mass of the ball bearing and mineral oil is 50.952 g. Calculate the density and radius of the ball bearing (volume of a sphere of radius r is 4/3πr3).

Marcal can wait for 1 year and find out whether the cash flows will be $50 million per year or $90 million per year before deciding to purchase the company. If it waits to purchase, Marcal can no longer sell the company for $450 million 2 years after purchase. Does decision-tree analysis indicate that it makes sense to purchase the electronics company? If so, when? Again, assume that all cash flows are discounted at 15%. (NPV calculation required)

1. how does age affect elimination problems

2. What is the difference between an indwelling catheter and a straight catheter?What are some reasons why a patient would need an indwelling catheter inserted?What are some reasons why a patient would need a straight catheter?What education should be given to the patient before, during, and after the procedure?How did you do while practicing? Did you forget anything? Did you stay sterile?

To buy a $160,000​house, you take out a 6​% ​(APR compounded​ monthly) mortgage for $130,000. Five years​ later, you sell the house for $195,000 ​(after all other selling​ expenses). What equity​ (the amount that you can keep before​ tax) would you realize with a 30​-year repayment​ term? Note: For tax​ purpose, do not consider the time value of money on​ $30,000 down payment made five years ago.

The realized equity will be $____ thousand?

Country risk

1. A company is planning a project that must be located in a country that has a relatively high level of political risk. That is, there is a risk that after the company has made an investment in the project in the foreign country, the government may alter the regulatory environment to the disadvantage of the company. Identify and explain two things the company can do before beginning this project to reduce the political risk the project faces.

2. Identify two sources of country risk that are not related to or caused by political risk.

An electron is placed in a region with a 1010 V/m electric field directed in the positive x-direction. The electron escapes this region after traveling 14.0 cm. What is the kinetic energy of the electron? What is the particle's velocity? Will a proton placed at the same initial position and traveling through a similar 14.0 cm path acquire the same amount of kinetic energy? Will the proton experience the same change in velocity? Why or why not?

I have seen this question on here before but the velocity portion was not present.

Colter Steel has $5,450,000 in assets. Temporary current assets $ 2,900,000 Permanent current assets 1,595,000 Fixed assets 955,000 Total assets $ 5,450,000 Short-term rates are 7 percent. Long-term rates are 12 percent. Earnings before interest and taxes are $1,150,000. The tax rate is 20 percent. If long-term financing is perfectly matched (synchronized) with long-term asset needs, and the same is true of short-term financing, what will earnings after taxes be?