PHYSICS HIGH SCHOOL

Two hikers are 15 miles apart and walking toward each other. They meet in 2 hours. Find the rate of each hiker if one hiker walks 2.3 mph faster than the other.

Answers

Answer 1
Answer:

Answer:

1- 2.6 mph

2- 4.9 mph

Explanation:

See attachment

Related Questions

If all of the forces acting on an object balance so that the net force is zero, then(A) the object must be at rest (B) the object’s speed will decrease (C) the object will follow a parabolic trajectory (D) the object’s direction of motion can change, but its speed cannot (E) None of the above
In ultrasound physics, which of the following is improved by increasing packet size ?
The force acting between two charged particles A and B is 5.2 × 10-5 newtons. Charges A and B are 2.4 × 10-2 meters apart. If the charge on particle A is7.2 × 10-8 coulombs, what is the charge of particle B?(k = 9.0 × 109 newton·meters2/coulomb2)A 2.4 × 10-2 coulombsB 4.6 × 10-11 coulombsC 5.2 × 10-11 coulombsD 7.2 × 10-8 coulombs
Which fossil fuel is used the most for energy production?a. coal b. oil c. natural gas d. uranium
2. A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to five times her weight as she goes through the dip. Of r = 21.5 m, how fast is the roller coaster traveling at the bottom of the dip?

A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer. Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a(1)longer wavelength
(2)higher speed
(3)longer period
(4)higher frequency

Answers

Answer: The correct answer is higher frequency.

Explanation:  

Doppler's effect is defined as the apparent change in the frequency of an electromagnetic wave due to the relative motion of an observer and source.

In the given problem, a stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer. In this case, there will be higher frequency.

If a stationary police officer directs radio waves emitted by a radar gun at a vehicle moving away the officer. In this case, there will be smaller frequency  but will have a longer wavelength.

Therefore, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

The emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher wavelength.

What is the Doppler effect?

A sudden change in the frequency due to the distance between the objects and source is explained by the doppler effect.

As the source and observer travel toward each other, the frequency of sound, light, or other waves increases or decreases.

The emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher wavelength.

Hence option 4 is correct.

To learn more about the doppler effect refer to the link;

brainly.com/question/15318474

What is the velocity of an object that has a mass of 2.5 kilogram and a momentum of 1,000 kg·m/sec?

Answers

P=MV. P=1000 M=2.5 V=?.
1000=2.5 x V
Divide both sides by 2.5
400=V
The velocity is 400

Green light has a lower frequency than blue light. Which color of light has a longer wavelength?

Answers

Although green light has a lower frequency than the blue light, but green light has the longer wavelength than the wavelength of blue light. The wavelength of green light is longer by a small margin than the wavelength of the blue light. Red light has the highest wavelength among all the available colors of light. Any color of light is nothing but an electromagnetic wave that enables us to see things around us. Humans mostly can see wavelengths between the Electromagnetic spectrum and the Ultra violet region.


Answer:

purple

Explanation:

A 20 kg crate of books is at rest on a table. what is the normal force on the books?

Answers


The weight of 20 kg is

                             (mass) x (gravity) =

                                   (20 x 9.8) = 196 newtons, downward.

There must be a force of 196 newtons upward on the mass. 
Otherwise the mass is accelerating either up or down.
 

Use the axes below to graph the skydiver's velocity. Remember that a negative velocity should be graphed below the X-axis. Be sure to include numerical and word labels, with units, for both axes.

Answers

Don’t we need a photo

Answer: This is the graph we are supposed to fill out.

Explanation:

The longest wavelength within the visible spectrum is _______ light. A. blue
B. orange
C. red
D. violet

Answers

The longest wavelength within the visible spectrum is the redlight. The answer is letter C. It is called visible light because it is theonly light that can be seen by the human eye. Red light is the longestwavelength around 620 to 750 nanometer. It is followed by orange which has awavelength of 590 t 620 nanometer. And then blue which has a wavelength of 450to 495 nanometer. And the shortest wavelength is violet which has a wavelengthof 380 to 459 nanometer.  

The longest wavelength within the visible spectrum is red light. The correct option is C.

The visible spectrum of light consists of different colors ranging from red to violet. Each color corresponds to a different wavelength. Among the given options, red light has the longest wavelength within the visible spectrum.

A. blue: Blue light has a shorter wavelength compared to red light. It is located on the shorter end of the visible spectrum.

B. orange: Orange light has a shorter wavelength compared to red light. It falls between red and yellow on the visible spectrum.

C. red: Red light has the longest wavelength among the visible colors. It is located on the longer end of the visible spectrum.

D. violet: Violet light has a shorter wavelength compared to red light. It is located on the shorter end of the visible spectrum, just after blue.

Therefore, the correct option is C. red as it has the longest wavelength within the visible spectrum.

To learn more about  the visible spectrum click:

brainly.com/question/15070911

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