1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GuDViN [60]
3 years ago
13

A satellite dish is in the shape of a parabolic surface. Signals coming from a satellite strike the surface of the dish and are

reflected to the​ focus, where the receiver is located. The satellite dish has a diameter of 14 feet and a depth of 2 feet. How far from the base of the dish should the receiver be​ placed?
Physics
1 answer:
RSB [31]3 years ago
3 0

Answer: 6.125 ft

Explanation:

If this dish has the form of a concave upward parabola and its vertex p is at the origin, its corresponding equation is:

x^{2}=4py

Where:

x is the radius, which can be found by dividing the diameter d=14 ft by half. Hence x=\frac{d}{2}=\frac{14 ft}{2}=7 ft

y=2 ft is the depth

p is the vertex of the parabola, where its base is

Finding p:

p=\frac{x^{2}}{4y}

p=\frac{(7 ft)^{2}}{4(2 ft)}

Finally:

p=6.125 ft This is where the the receiver should be placed

You might be interested in
Electric field lines always begin at _______ charges (or at infinity) and end at _______ charges (or at infinity). One could als
lesantik [10]

Answer:

b)

Explanation:

By convention, the electric field lines (which are tangent to the direction of the electric field at a given point) always begin at positive charges, and finish at negative charges.

This is a consequence of the convention that states that the electric field has the direction of the trajectory of a positive test charge when released from rest in an electric field.

(As the positive charge would move away from positive charges and would  be attracted by negative ones).

So, the combination of answers that is true is b) (positive, negative, positive).

3 0
3 years ago
Omparing Technological Design and Scientific Investigation
djyliett [7]

Answer:

杰恩斯克克斯克奇沃伊斯克克斯克什德布德克什恩克恩德恩克恩茨克杰兹姆克斯恩斯姆斯姆德恩德姆德武伊乔奥斯克斯杰德布德赫德夫赫富伊什杰吉迪赫德赫夫赫德

6 0
3 years ago
Need help best answer will get brainiest
solong [7]

Answer:

1) A trait is a specific feature or characteristic, typically genetic.

2) One trait that helps an animal survive is a Chameleon's camouflage. Camouflage helps the chameleon blend in with their surroundings to avoid a predator or to sneak up on prey.

Explanation:

6 0
3 years ago
Read 2 more answers
Which of the following would most likely be an example of a mass-transit disaster?
Aleonysh [2.5K]

Answer:

i think it is c if not im sorry if im wrong

Explanation:

7 0
3 years ago
a 72kg person is standing on a bathroom scale (calibrated in newtons). what is the reading of the scale when the acceleration is
Likurg_2 [28]

Answer:

F=ma

therefore A=F/M

Explanation:

i think that's what your doing but I'm not sure

4 0
3 years ago
Other questions:
  • To calculate the ideal mechanical advantage of a lever divide the input arm by the
    14·1 answer
  • Can u please help me
    11·2 answers
  • What would decrease the resistance of wires carrying an electric current
    5·2 answers
  • Which describes the average velocity of an ant traveling at a constant speed
    12·1 answer
  • True or false a moving wave source does not affect the frequancy of the wave encountered by the observer
    11·2 answers
  • The following picture shows some give reasons. Please answer it and I will mark you as brainliest......
    8·2 answers
  • We can look at the band structure of an element to get an idea of how many electronsper atom participate in conduction. We can a
    15·1 answer
  • Suppose a ball with mass M hangs vertically from a spring with stiffness k and relaxed length L0. At what length Leq will the ba
    12·1 answer
  • A jogger takes five minutes to run a distance of three kilometres. His speed, in metres per second, is approximately A) 5.5 M/S
    14·1 answer
  • 13. Determine the kinetic energy of a 2000g roller coaster car that is moving with a speed of 2m/s.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!