PHYSICS HIGH SCHOOL

A typical mirror in a person's house would be an example of a/an _______ mirror. A. convex
B. plane
C. angular
D. concave

Answers

Answer 1
Answer: In the question "A typical mirror in a person's house would be an example of a/an _______ mirror." The correct answer is plane (option B).
A plane mirror is a mirror with a flat refractive surface.
The image formed by a plane mirror is virtual, upright, the same distance from the mirror as the object's distance and the same size as the object.
Answer 2
Answer:

Penn Foster Student's:  Plane

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According to Newton's 2nd law of motion, Jim can throw a _____ farther than a _____. tennis ball, basketball can of soda, liter bottle of soda chair, couch all of the above

Answers

Answer:

All of the above

Explanation:

According to Newton's second law of motion,

Force = Mass * Acceleration

If a certain force is applied on objects of different mass, the lighter object will travel farther and faster. All the options in the question have pairs where one object is lighter than other.

So, Jim can throw a tennis ball farther than a basketball. Jim can throw a can of soda farther than a liter bottle of soda and he can throw a chair farther than a couch.
According to Newton's 2nd law of motion, Jim can throw a tennis ball farther than a basketball. The rest of the choices do not answer the question above.

Choose the best answer for each situation. A scientist with the EPA examining water for contamination writes down that there was an iridescent sheen on the surface of the water. What type of data did the scientist record?

Answers

The scientist has written down and example of qualitative data. Since he specifically wrote down that there was an iridescent sheen on the surface of the water, he is writing down the quality of water as seen by him. The type or condition cannot be expressed numerically, which makes it a qualitative type of data.

Nicolaus Copernicus believed that the: sun revolved around the earth sun was the center of the solar system movement of planets could explain weather stars and planets represented spirits

Answers

Nicolaus Copernicus spearheaded the idea of heliocentrism, that is, that the sun was the center of the solar system. Back in his time, a lot of astronomers and scientists believed that the earth was the center of the solar system. This so called belief was called geocentrism. Nicolaus was one fo the first few who pushed heliocentrism.

Answer:

B. Sun was the center of the solar system.

You drive your car for 2.0 h at 40.0 km/h then for 2.0 h at 60.0 km/h what is your average velocity?

Answers

In order to calculate velocity, we'd need to know the straight-line distance between the start and the finish, and we'd also need the direction of that line.  The best we can do with the information given in the question is calculate the average SPEED.

Average speed = (total distance covered) / (time to cover the distance).

Distance covered in the first 2 hours = (2 hr) x (40 km/hr) = 80 km.
Distance covered in the second 2 hours = (2 hr) x (60 km/hr) = 120 km.

Total distance covered = (80 + 120) = 200 km
Time to cover the distance = (2 + 2) = 4 hours

Average speed = (200 km) / (4 hours)  =  50 km/hour

The swimming pool at perris hill plunge is 50 feet long and 25 feet wide. if the bottom of the pool is slanted so that the water depth is 3 feet at the shallow end and 15 feet at the deep end, what is the angle of elevation at the bottom of the pool?

Answers

The swimming pool at perris hill plunge is 50 feet long and 25 feet wide. if the bottom of the pool is slanted so that the water depth is 3 feet at the shallow end and 15 feet at the deep end,the angle of elevation at the bottom of the pool is calculated by Over a 50 foot (surface) length, there is a 12 foot (vertical) drop. tan A = 12/50 = 0.24 A = 13.5 degrees

When a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy. TRUE or FALSE?

Answers

i think it's true because when it rotate there is a energy loss so the heat energy represent the losses
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