PHYSICS HIGH SCHOOL

Calculate the displacement for an object traveling at a constant velocity of 32 m/s for 4 s.

Answers

Answer 1
Answer:

Answer:

128 m

Explanation:

displacement = velocity x time

32 x 4 = 128
Answer 2
Answer:

Answer:

Displacement= velocity X time

= 32 X 4

=128m/s

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Humans can perceive infrared light with their eyes. True or false

Answers

The answer is true. Humans can in fact perceive infrared light with their eyes.
Truuuuuuuuuuuuuuuuuuuue (love) jk


It's true

Area with lower atmospheric pressure than its surrounding areas; this makes air from surrounding areas to flow into the low, the end result of which is probably cloudiness and precipitation.

Answers

Answer:

"Low pressure system"

Explanation:

The area you are describing is known as a "low-pressure system" in meteorology. In a low-pressure system, the atmospheric pressure at the surface is lower than the pressure in the surrounding areas. This difference in pressure causes air from the surrounding areas to flow into the low-pressure region, creating a circulation pattern. As the air rises within the low-pressure system, it cools and can lead to the formation of clouds and precipitation. Low-pressure systems are often associated with stormy weather and can bring rain, snow, or other forms of precipitation, depending on the temperature and moisture content of the air.

The excitation of an electron on the surface of a photocell required 5.0 x 10 –27 J of energy. Calculate the wavelength of light that was needed to excite the electron in an atom on the photocell

Answers

c = speed of light in vacuum = about 3 x 10⁸ meters/second 
h = Planck's Konstant = 6.63 x 10⁻ ³⁴ joule-second

Energy = (h x frequency) = (h c / wavelength)
Wavelength = (h c) / (energy)

Wavelength = (6.63 x 10^-34 joule-sec x 3 x 10^8 meter/sec) / (5 x 10^-27 joule)

= 19.89 x 10^-26 / 5 x 10^-27 = 39.78 meters

This is an astonishing result !  Simply amazing.  That wavelength corresponds
to a frequency of about 7.54 MHz, in one of the short-wave radio bands used by
a lot of foreign-broadcast stations. 

If the number in the problem is correct, it means that this 'photocell' responds
to any electromagnetic signal at 7.54 MHz or above ... short-wave radio,
commercial FM or TV signals, FRS walkie-talkies, garage-door openers,
Bluetooth thingies, home WiFi boxes, WiFi from a laptop, microwave ovens,
cellphones, any signal from a satellite, any microwave dish, any heat lamp,
flashlight, LED, black light, or X-ray machine.  Some "photocell" ! 

I'm thinking the number given in the problem for the energy of a photon
at the detection threshold of this device must be wrong by several orders
of magnitude.

(But my math is still bullet-proof.)

A force of 34.5 newtons is applied to an object at an angle of 45 º with the horizontal. What is the force acting on the object in the horizontal direction?

Answers

The horizontal component of the force is 34.5 cos(45) = 24.4 newtons

The vertical component of the force is 34.5 sin(45) = 24.4 newtons

Answer:

24.4

Explanation:

A snail can move approximately 0.30 meters per minute. How many meters can the snail cover in 15 minutes?

Answers

A snail can move approximately 0.30 meters per minute then it would cover 4.5 meters in 15 minutes.

What is speed?

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second. The generally considered unit for speed is a meter per second.

As given in the problem a snail can move approximately 0.30 meters per minute and we have to calculate the distance covered in 15 minutes.

speed of the snail  =  0.30 meters per minute

time = 15 minutes

distance covered by the snail = speed  ×time

distance covered by the snail = 0.30 ×15

distance covered by the snail = 4.5 meters

Thus, the distance covered by the snail in the 15 minutes would be 4.5 meters.

Learn more about speed from here,refer to the link ;

brainly.com/question/7359669

#SPJ2
distance = velocity (or speed) x time
so, distance = 0.30 meters.min x 15 mins
distance = 4.5 meters 

a 5 v battery is connected to a resistor which draws a 2 a current. What is the power used by this circuit

Answers


Electrical power = (voltage) x (current)

                         = (5 volts) x (2 amperes)  =  10 watts.
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