A train traveling 80.0 kph is blowing its horn as it approaches a railroad crossing. The horn has a frequency of 300.0 Hz. Assume the speed of sound is 331.5 m/s. What is the observed frequency of the horn?

395 Hz

281 Hz

322 Hz

X does 500 joules of work in 1/6 hours and Y does 600 joules of work in 1/3 hours. what will be the ratio of the power delivered by X and Y.

Beams used in Heavy Timber construction are sometimes firecut. This is done to: a) allow air circulation at the beam's end in an effort to reduce moisture decay. b) counteract wind uplift forces.

Case 1: your car is moving toward the west and the driver presses down on the gas pedal. You feel yourself being pressed back against the seat. During this instant, which direction is the car accelerating?

A car traveling at + 7.0 m/s accelerates at the rate of + 0.80 m/s2 for an interval of 2.0 s. Find vf.

Which compound is an example of a binary ionic compound? A) H2O B) H2SO4 C) MgF2 Eliminate D) SF6

Which of the following describes a characteristic of a series circuit? There is more than one path for the electrons to take. There is at least one power source and at least one receiver. All parts of the circuit are connected one after the next.

If you push against a stationary brick wall for several minutes, you do no work A. on the wall. B. at all. C. Both of the above. D. None of the above.

Awave is traveling through X. What can be known about X? It is empty space. It is any medium. It is a solid It is a liquid.

Who wrote the mayflower compact?

In the formula for specific heat, which quantity is measured in units of J/g•°C? a - c b - Q c - T d - m