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
pantera1 [17]
2 years ago
11

Dr. Kirwan is preparing a slide show that he will present to the executive board at tonight's committee meeting. He places a 3.5

0-cm slide behind a lens of 20.0 cm focal length in the slide projector. A) How far from the lens should the slide be placed in order to shine on a screen 6.00 m away? B) How wide must the screen be to accommodate the projected image?​
Physics
1 answer:
lisov135 [29]2 years ago
8 0

Answer:

A) d_o = 20.7 cm

B) h_i = 1.014 m

Explanation:

A) To solve this, we will use the lens equation formula;

1/f = 1/d_o + 1/d_i

Where;

f is focal Length = 20 cm = 0.2

d_o is object distance

d_i is image distance = 6m

1/0.2 = 1/d_o + 1/6

1/d_o = 1/0.2 - 1/6

1/d_o = 4.8333

d_o = 1/4.8333

d_o = 0.207 m

d_o = 20.7 cm

B) to solve this, we will use the magnification equation;

M = h_i/h_o = d_i/d_o

Where;

h_o = 3.5 cm = 0.035 m

d_i = 6 m

d_o = 20.7 cm = 0.207 m

Thus;

h_i = (6/0.207) × 0.035

h_i = 1.014 m

You might be interested in
The electric field between two parallel plates has a magnitude of 875 n/
Marizza181 [45]
The answer:
1.8 x 10^0 V
7 0
2 years ago
If you wanted to learn more about ancient scientific knowledge, whose life<br> would you research?
yaroslaw [1]
Ptolemy life is probably my most recommenced
7 0
3 years ago
Read 2 more answers
what would the net force be on the box in the problems shown below.( both force and direction).​ for all four diagrams. please e
DIA [1.3K]

Answer:
A) object moves 20 N [West] or -20 N [East]
B) object moves 6 N [South] or -6 N [North]
C) object moves 90 N [West] or -90 N [East]
D) object does not move and is at rest*

*Rest means 0


Why:

A)both forces from north and south that are pushing against the object neutralize each other. Assume that north is positive and south is negative: 20 [N] + (-20) [S] = 0
On West and east, you can see that west has a greater force. Assume that west is negative and east is positive: 50 [E] + (-70) [W] = -20 [E]
8 0
2 years ago
Which of the following has the most thermal energy?
Lelechka [254]
Answer:
2. A 1 litre mug of hot chocolate at 75 degrees.

Explanation:
Thermal energy is directly proportional to mass, so as the mass increases, the thermal energy of the substance increases as well.
8 0
3 years ago
William Gilbert used a terella in an attempt to explain _____.
Alex787 [66]

Answer:

why compasses point towards the north and south poles of the earth.

Explanation:

hope it helps!!

6 0
2 years ago
Other questions:
  • Which of these materials is an example of an insulator?
    7·1 answer
  • A puck is sliding around a circular track that is banked at an angle with respect to the horizontal such that no friction betwee
    9·1 answer
  • Why is the study of black holes important?
    15·1 answer
  • How does the vertical component of a projectile’s motion compare with the motion of vertical free fall when air resistance is ne
    14·1 answer
  • Why do the compass needles change direction when the electric current is Flowing
    10·2 answers
  • When the resistance in a circuit remains constant, how are the voltage and current related?
    9·2 answers
  • Your total calorie _____ is an estimation of how many calories you burn when you exert yourself. A.Moderate B.Conditions C.Expen
    7·1 answer
  • 1. How much heat is required to raise the temperature of 57.8kg of silver from 17.0°C to
    14·1 answer
  • Which of the following describe wind patterns created by a low-pressure front, where two air masses are interacting? Choose one
    15·1 answer
  • What is overtraining?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!