PHYSICS HIGH SCHOOL

A mirror with a flat surface is aA. plane mirror.
B. convex mirror.
C. concave mirror.
D. virtual mirror.

Answers

Answer 1

Answer: This kind of a mirror is called a Plane mirror.

Other types mentioned here are not flat surfaces.

Answer 2

Answer:

Answer:

The correct answer is option A, Plane Mirror

Explanation:

A plane mirror has a flat surface while remaining concave and convex mirror have bulging surfaces. A concave mirror is a converging mirror while a convex mirror is a diverging mirror. Having a planar surface, the angle of incidence and reflection is equal in a plane mirror. There is nothing like a virtual mirror however the mirrors have the ability to form virtual image.

Thus among all the options, option A is correct

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Which sentence contains italicized words that are used as an infinitive phrase?a. Kelly went to the grocery store.b. Tom went there for some flour.c. Mark wanted to go, but not today.d. Jane parked her car behind a truck. ?

Which of the following best explains why most chemical reactions proceed more quickly when the concentrations of reactants are increased?a. The increased concentration increases the number of collisions between molecules.
b. The products of chemical reactions are more stable at higher concentrations.
c. At higher concentrations, reactant molecules move more quickly.
d. At higher concentrations, product molecules are able to catalyze the reaction.

Answers

A.
Because you increase the concentration of the reactants, it means that there are more molecules of the reactants present in a smaller amount of space.

This being the case, there is a higher chance that these molecules will collide with enough energy to overcome the activation barrier.

The other ones are completely wrong, but if you would like an explanation as to why they are, just ask :)

Answer:

The increased concentration increases the number of collisions between molecules.

Explanation:

I just took the test. Flvs

Where should an object be placed in front of a concave mirror’s principal axis to form an image that is real, inverted, larger than the object, and farther from the mirror than the object is?

Answers

Answer:

At focus.

Explanation:

When the object is placed at the focus of a concave mirror, the image will form at infinity. The formed image is real and inverted and its size is highly enlarged.

When the object is placed between the pole and the focus, the image will formed behind the mirror. The formed image is virtual and erect and its size is enlarged. This is the only case when the formed image is virtual and erect.

if the object is kept in between the principle axis and the focus but some what nearer to the focus then we will get the enlarge,erect,and real image.

A scientific law is based on repeated inferences made over long periods of time.

Answers

A scientific law is based on repeated inferences made over long periods of time.
TRUE

Answer:

False

Explanation:

Bob weighs 80 pounds. He ran up the steps which rose 14 feet. Fred weighs 110 pounds. He ran up the same steps as Bob. If both boys reached the top of the 14-foot stairs at the same time, which boy had the greatest horsepower?

Answers

Bob gained (80lbs x 14ft) = 1120 ft-lbs of energy.

Fred gained (110lbs x 14ft) = 1540 ft-lbs of energy

Since they both took the same amount of time, Fred's power (rate
of doing work) was greater than Bob's power (rate of doing work).

Answer:

Bob gained (80lbs x 14ft) = 1120 ft-lbs of energy.

Fred gained (110lbs x 14ft) = 1540 ft-lbs of energy

Since they both took the same amount of time, Fred's power (rate

of doing work) was greater than Bob's power (rate of doing work).

Explanation:

The equation that relates the temperature of an object to the wavelength of its peak radiation is called _____.the blackbody law
Wien's law
Kepler's law
the spectral law

Answers

The equation that relates the temperature of an object to the wavelength of its peak radiation is called Wien's law. Wien's law states that: the black body radiation curve for different temperatures peaks at a wavelength inversely proportional to the temperature.

Answer:

The correct choice is

Wien's law

Explanation:

According to Wien's law, wavelength of maximum intensity of emission of black body radiation is inversely proportional to absolute temperature (T) of the black body. The formula for the law is given as

$\lambda _(m)\propto (1)/(T)\n$

$\lambda _(m)= (b)/(T)\n$

where

$\lambda _(m)$ = wavelength of maximum intensity

T = temperature

b = Wien's constant

1 Determine the wavelength, frequency, and amplitude for each wave.2. Sprays as
Summarize it!
c The
Time Elapsed: 45
D
-0.5 m
10 m
15 m
20 m
0.5 m
I. 0.5 m