This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A woman is riding a bicycle at 18.0 m/s along a straight road that runs parallel to and right next ... (Read 98 times)

leilurhhh

  • Hero Member
  • *****
  • Posts: 560
on: Jul 29, 2018
A woman is riding a bicycle at 18.0 m/s along a straight road that runs parallel to and right next to some railroad tracks. She hears the whistle of a train that is behind.
 
  The frequency emitted by the train is 840 Hz, but the frequency the woman hears is 778 Hz. Take the speed of sound to be 340 m/s. (a) What is the speed of the train, and is the train traveling away from or toward the bicycle? (b) What frequency is heard by a stationary observer located between the train and the bicycle?

Question 2

A 2.10-kg hammer is transported to the Moon. The radius of the Moon is 1.74  106 m, its mass is 7.35  1022 kg, and G = 6.67  10-11 N  m2/kg2. What is the gravitational force exerted on the hammer on Earth and on the Moon?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

johnharpe

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 29, 2018
Answer to Question 1

(a) 7.67 m/s, away from the bicycle (b) 821 Hz

Answer to Question 2

20.6 N (on Earth), 3.40 N (on the Moon)


leilurhhh

  • Member
  • Posts: 560
Reply 2 on: Jul 29, 2018
YES! Correct, THANKS for helping me on my review

ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

This woman requires a soft-food-only diet This woman requires a soft-food-only diet
Tai chi walk along straight line. From tai chi stance, shift weight to the back leg and turn the ... Tai chi walk along straight line. From tai chi stance, shift weight to the back leg and turn the ...
Leg pull. Grasp both feet behind the heels, and gently pull legs straight toward you several inches ... Leg pull. Grasp both feet behind the heels, and gently pull legs straight toward you several inches ...
Flexion of the hip with straight knee Flexion of the hip with straight knee
A bus starts from restat a station and accelerates at a rate of 2 m/s^2 for 15 seconds. It then runs A bus starts from restat a station and accelerates at a rate of 2 m/s^2 for 15 seconds. It then runs
Did parallel evolution happen in epiphytes, halophytes and rheophytes? Did parallel evolution happen in epiphytes, halophytes and rheophytes?
Video: Stomach peristalsis - Movement of Food Through the Small Intestine

For a complete list of videos, visit our video library