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AfilCa [17]
3 years ago
9

if researchers hit a sheet of metal with a yellow light and nothing happens, what color should the try next?​

Physics
1 answer:
Nataliya [291]3 years ago
3 0

The photoelectric emission is possible if the wavelength of the incident light is less than that of yellow light

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What is Newton's Law
r-ruslan [8.4K]
I hope you are referring to Newton's Laws of Motion by "Newton's Law".

There are three laws quoted by the great physicist of all time Sir Isaac Newton.

These laws are the building-blocks of the field of the Physics known as Classical Physics or Classical Mechanics.

Law 1. If no force applied externally, then a body in rest will always be in rest and a body in motion will continue to move in a straight line with a uniform velocity.

Law 2. The rate of change of momentum is directly proportional to the force applied and the direction of motion is always in the direction of the force applied.

Law 3. Every action has an equal and opposite reaction.

The Law 1 is also called the law of Inertia.

From the 2nd law, we can derive the equation of force, that is F =m.a (m = mass; a = acceleration)
5 0
3 years ago
A passenger jet flies from one airport to another 1,273 miles away in 2.2 h. find its average speed.
oee [108]
Speed : distance divide by time . 1273/2.2 = ...

Use calculator .
3 0
3 years ago
Read 2 more answers
WORKSHEET
Anna71 [15]

Answer:

The total resistance of the circuit = 188ohms

Explanation:

potential difference = 25volts

For resistors in series, equivalent resistance

Rt = R1 + R2 + R3

Rt = 120 + 18 + 50

Rt = 188ohms

The total resistance of the circuit = 188ohms

4 0
3 years ago
91.0x26x504 ...............
Hoochie [10]

Answer:

1192464

Explanation:

91.0 times 26 = 2366

2366 times 504 = 1192464

7 0
3 years ago
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A package of mass 5 kg sits on an airless asteroid of mass 7.6 × 1020 kg and radius 8.0 × 105 m. We want to launch the package i
Effectus [21]

Answer:

s =  1.7 m

Explanation:

from the question we are given the following:

Mass of package (m) = 5 kg

mass of the asteriod (M) = 7.6 x 10^{20} kg

radius = 8 x 10^5 m

velocity of package (v) = 170 m/s

spring constant (k) = 2.8 N/m

compression (s) = ?

Assuming that no non conservative force is acting on the system here, the initial and final energies of the system will be the same. Therefore  

• Ei = Ef

• Ei = energy in the spring + gravitational potential energy of the system

• Ei = \frac{1}{2}ks^{2} + \frac{GMm}{r}

• Ef = kinetic energy of the object

• Ef = \frac{1}{2}mv^{2}  

• \frac{1}{2}ks^{2} + (-\frac{GMm}{r}) = \frac{1}{2}mv^{2}  

• s = \sqrt{\frac{m}[k}(v^{2}+\frac{2GM}{r})}

s = \sqrt{\frac{5}[2.8 x 10^5}(170^{2}+\frac{2 x 6.67 x10^{-11} x 7.6 x 10^{20}}{8 x 10^5})}

s =  1.7 m

7 0
3 years ago
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