05-03-2014, 03:55 PM
I have a retest on Monday for a test I received a 33 on, but there are not formulas on the test I am correcting. I am going to post the questions I am currently unsure of and input would be greatly appreciated. I have corrected 10 multiple choice questions but the math itself I am issues with.
If you can provide the formula, that'll be plenty.
So, it begins.
13. A microwave oven warms food using electromagnetic waves with a frequency of 8.5x10^9 Hz. What is the wavelength of these microwaves in nm?
14. Light from a distant planet reaches Earth in 6.5 years. How far from Earth is this planet in meters?
15. A concave shaving mirror has a center of curvature of 12.0 cm. A man is shaving 5 cm in front of the mirror. What is the magnification of his face, as seen in the mirror?
16. What is the frequency of light from Mr. Teacher's laser pointer if it produces a coherent beam of 552 nm light?
17. A convex mirror has a focal length of 25.0 cm. At what distance from the mirror does the image of a person 1.0 m in front of the mirror appear?
A car is placed in front of a plane mirror at a distance of 3.5 meter. The car is 250 cm tall.
18. At what distance from the mirror does the image of the car appear? Include signs if necessary.
20. How tall does the car's image appear? Include signs if necessary.
An object is 3.0 cm in front of a convex mirror. The mirror has a radius of curvature of 6.0 cm. If the object has a height of 3.0 cm. find the following:
21. How tall is the image?
22. What is the magnification of the image?
Using a ray diagram, solve the problem above. Check your numbers with your calculations. (I'm probably just going to look this one up because I have no idea)
An object is 1.5 cm. tall is standing 5.0 cm. from a concave mirror that has a focal length of 3.0 cm.
23. How tall is the image?
24. What is the magnification of the image?
Using a ray diagram, solve the problem above. Check your numbers with your calculations.
I really appreciate any input. I don't need them solved. I need to be able to do that. We are provided a slip with the formulas during the test but that stays in class for the next group, so I don't have the formulas, and this was about 2 weeks ago.
I will be fine even if I fail as I did pass that 6 weeks with a 72, but if I can augment that a bit, I will.
If you can provide the formula, that'll be plenty.
So, it begins.
13. A microwave oven warms food using electromagnetic waves with a frequency of 8.5x10^9 Hz. What is the wavelength of these microwaves in nm?
14. Light from a distant planet reaches Earth in 6.5 years. How far from Earth is this planet in meters?
15. A concave shaving mirror has a center of curvature of 12.0 cm. A man is shaving 5 cm in front of the mirror. What is the magnification of his face, as seen in the mirror?
16. What is the frequency of light from Mr. Teacher's laser pointer if it produces a coherent beam of 552 nm light?
17. A convex mirror has a focal length of 25.0 cm. At what distance from the mirror does the image of a person 1.0 m in front of the mirror appear?
A car is placed in front of a plane mirror at a distance of 3.5 meter. The car is 250 cm tall.
18. At what distance from the mirror does the image of the car appear? Include signs if necessary.
20. How tall does the car's image appear? Include signs if necessary.
An object is 3.0 cm in front of a convex mirror. The mirror has a radius of curvature of 6.0 cm. If the object has a height of 3.0 cm. find the following:
21. How tall is the image?
22. What is the magnification of the image?
Using a ray diagram, solve the problem above. Check your numbers with your calculations. (I'm probably just going to look this one up because I have no idea)
An object is 1.5 cm. tall is standing 5.0 cm. from a concave mirror that has a focal length of 3.0 cm.
23. How tall is the image?
24. What is the magnification of the image?
Using a ray diagram, solve the problem above. Check your numbers with your calculations.
I really appreciate any input. I don't need them solved. I need to be able to do that. We are provided a slip with the formulas during the test but that stays in class for the next group, so I don't have the formulas, and this was about 2 weeks ago.
I will be fine even if I fail as I did pass that 6 weeks with a 72, but if I can augment that a bit, I will.