PHYSICS HIGH SCHOOL

Which does not contain a lens?
A.a camera
B.an eye
C.a mirror
D.binoculars

Answers

Answer 1
Answer: A MIRROR does not contain a lens.
Answer 2
Answer:

Answer:

C. A Mirror

Explanation:

Took the test <3

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The absolute magnitude of a star is the amount of light received by Earth. a. True
b. False.

Answers

B.false......absolute magnitude

Measure of the amount of light a star actually gives off.....thats the definition....hop this is helpful

So this statement is false.

Plz help it's physics really easy

Answers

Technically, there is not enough information to tell, because in your picture, you cut off the last word in the question.

If the last word in the question is "acceleration", then "C" is the correct choice.

If some other word is the last one in the question, then it has to be "D".

Answer:

D. there is not enough information to tell

Explanation:

I have already read this in grade five

Which of the following can be determined by studying the spectrum of a star?the chemicals in the atmosphere of the star
the motion of the star
the temperature of the atmosphere of the star
all of the above

Answers

Answer:

all of the above

Explanation:

The spectrum of the star is is used to study its composition, motion and surface temperature. The absorbed or emitted wavelength indicates the elements present. The peak wavelength determines the surface temperature of the star using Wein's law. Peak wavelength is inversely proportional to temperature. The red-shift or blue shift indicates whether the star is moving away or towards us.

The right answer for the question that is being asked and shown above is that: "all of the above." the following that can be determined by studying the spectrum of a star includes: the chemicals in the atmosphere of the star; the motion of the star; the temperature of the atmosphere of the star.

What is a force that does not involve physical contact between two objects? a. gravitational force
c. constant force
b. field force
d. planetary force?

Answers

a force that does not involve physical contact between two objects ic called field force.

a force that does not involve physical contact between two objects ic called field force.

If a car goes along a straight road heading west and speeds up from 25 ft/s to 60 ft/s in 5 s, calculate the acceleration.

Answers


Acceleration  = 

         (change in speed) / (time for the change)
and
         direction of the change.

Change in speed = (end speed)-(start speed) = (60 - 25) = 35 f/s
Time for the change = 5 sec
Direction of the change = west

                 Acceleration  =  7 ft/sec² west .

A car with a mass of 1500 kg is traveling at a speed of 30 m/s. Calculate its kinetic energy.step by step pls​​

Answers

Explanation:

KE = 1/2 mv²,

where KE is the kinetic energy,

m is the mass,

and v is the velocity.

Given m = 1500 kg and v = 30 m/s:

KE = 1/2 (1500 kg) (30 m/s)²

KE = 675,000 J

KE = 675 kJ
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