Any help is appreciated
Answers
image distance,di=10 cm
object distance,do=20cm
magnification, m=di/do
=10/20
=0.5
since the image is virtual, magnification is negative.
therefore m=-0.5
Related Questions
When an object is placed 8 millimeters from a concave spherical mirror, a clear image can be projected on a screen 16 millimeters in front of the mirror. If the object has a height of 4 millimeters, the height of the image is A. 2 millimeters. B. 4 millimeters. C. 8 millimeters. D. 12 millimeters.
A closed conducting loop through which an electrical current can flow is which of the following?a. resistance b. circuit c. voltage d. electrical pressure
Use your understanding of d-t graphs to describe what is happening in the graph.
Consider the markets for BP supreme-grade gasoline, all BP grades of gasoline, and all gasoline. For which of these three markets will demand be most elastic? Demand will be most elastic for?
b. Odor pollution
c. Low land use
d. Possible depletion of reservoirs
Answers
Geothermal energies are widely used for various domestic and power supply processes. The lower usage of land is an advantage of geothermal energy. Hence, option (c) is correct.
What is Geothermal Energy?
The energy generated in the form of heat from the Earth is known as geothermal energy. Rocks and Fluids beneath the Earth's crust are the major sources of these kinds of energies.
The advantages of geothermal energy are as follows -
- It is a renewable source of energy that is clean and sustainable.
- No emission produced, geothermal plants do not produce greenhouse gases like fossil fuels plants. Therefore, it is also known as an eco-friendly source of energy.
- It can be pumped back to the ground is among other advantages.
Thus, we can conclude that the lower usage of land is an advantage of geothermal energy. Hence, option (c) is correct.
Learn more about geothermal energy here:
Answer;
C. Low land use
Explanation;
- Geothermal energy is the type of energy that is generated as a result of heat from the Earth.
- There are many advantages associated with geothermal energy which includes; it is a renewable source of energy that is clean and sustainable, no emission produced, geothermal plants do not produce green house gases like the fossil fuels plants, it can be pumped back to the ground among other advantages.
Answers
When the ball reaches the highest point, its velocity will be zero. So final velocity is v=0m/s
Here, the time to reach highest point is equal to time to hit ground from highest point.
Consider upward motion, the acceleration of the ball is a=−g=−9.8m/s
2
(minus for motion opposite to gravity)
If t be the required time.
Using v=u+at,
0=25+(−9.8)t
⟹ t=2.5s
Thus the ball hits the ground after 2.5 seconds after reaching its highest point.
Answers
Answer:
1,803,036.67 W
Explanation:
Data provided in the question:
People per hour that can be moved by lift = 49800
Height of movement, h = 190 m
Average mass per person = 70 kg
Now,
Power = Rate of doing work
Thus,
Power = ΔU
= mgh
here,
m = total mass
g = acceleration due to gravity
or
Power = (70kg × 49800)(9.8)(190)
or
Power = 6,490,932,000 J per hour
also,
Watt = Joule/second
Therefore,
Power = 6,490,932,000 ÷ 3600
= 1803036.67 W
Final answer:
To estimate the maximum total power needed for Squaw Valley ski area to move 49800 people per hour on their lifts, we calculate the work done per person per hour and then divide it by the time taken to travel vertically by 190 m. The estimated maximum total power needed is 3.31 x 10^8 W.
Explanation:
To estimate the maximum total power needed to move 49800 people per hour on a skilift at Squaw Valley, we can calculate the work done per person per hour and then divide it by the time taken to travel vertically by 190m. The work done is equal to the potential energy gained, which is given by the formula mgh, where m is the average mass per person (70 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the vertical height gained (190 m). Multiplying this by the number of people per hour gives us the total work done per hour. Dividing this by the time taken to travel the vertical height gives us the maximum power needed. The power is given by the formula P = W/t, where W is the work done and t is the time taken.
Using the given values, we have:
Work done per person per hour: (70 kg) x (9.8 m/s^2) x (190 m) = 128660 J
Total work done per hour: 128660 J x 49800 = 6.40 x 10^9 J
Time taken to travel vertically by 190m: 190 m / (9.8 m/s^2) = 19.39 s
Maximum power needed: (6.40 x 10^9 J) / (19.39 s) = 3.31 x 10^8 W
Learn more about Power needed for ski lift here:
#SPJ3
Answers
Answer:
Chemical engineers develop and design chemical manufacturing processes. They apply the principles of chemistry, biology, physics, and math to answer problems that involve the production of chemicals, fuel, drugs, food, and many products
Explanation:
Answer:
The main role of chemical engineers is to design and troubleshoot processes for the production of chemicals, fuels, foods, pharmaceuticals, and biologicals, just to name a few. They are most often employed by large-scale manufacturing plants to maximize productivity and product quality while minimizing costs
Explanation:
Answers
Answers
as an effect of the light sources moving away from us.
That's the basis of the whole idea of the expanding universe,
and ultimately, the big bang theory.
If we ever find another mechanism that can produce the same
shift in the wavelengths of light without the source moving away
from us, then the whole system of the expanding universe and the
big bang theory will fall apart.