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podryga [215]
3 years ago
8

What did the results of photoelectric-effect experiment establish?

Physics
2 answers:
Bond [772]3 years ago
7 0

Answer:

Thanks For Points Mark Me Brainliest Please

Explanation:

Electrons are emitted as soon as low-intensity, high-frequency light hits a metal surface.

A. Is It

TEA [102]3 years ago
6 0

Answer: I think the answer would be A. Electrons are emitted as soon as low intensity, high frequency light hits a metal surface. Byee.

-MrBeast

Explanation:

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A 50.0-kg crate is being pulled along a horizontal smooth surface. The pulling force is 10.0 n and is directed 20.0° above the h
steposvetlana [31]

Answer:

0.188 m/s^2

Explanation:

Assuming the crate does not lift above the ground and remains along the floor, then its acceleration will be in the horizontal direction. Therefore, we can use Newton's second law to find its acceleration:

F_x = ma_x

where

F_x is the net force on the crate along the x-direction

m is the mass of the crate

a_x is the acceleration

Here we have:

m = 50.0 kg

F_x = F cos \theta = (10.0 N)(cos 20.0^{\circ})=9.4 N is the component of the pulling force along the horizontal direction

Solving for the acceleration,

a_x = \frac{F_x}{m}=\frac{9.4}{50.0}=0.188 m/s^2

6 0
3 years ago
You go outside on a clear night the moon looks like half - circle. About a week later on another clear night you go outside ,and
ZanzabumX [31]
You will see about half of the moon after a week... the week after the next week, you will probably see the full moon

hope this helps and you rate me good

5 0
3 years ago
Read 2 more answers
A worker pushed a 25.0 kg block 6.50 m along a level floor at constant speed with a force directed 30.0° below the horizontal. I
Kipish [7]

Answer:

a) 855.41J

b) 855.41J

Explanation:

The force equation is

N - mg - F sinθ = 0

N = mg + F sinθ

The frictonal  force is =

F_x = F cos \theta

U_xN = Fcos\theta

substitute the value of the normal force in the above equation

U_x (mg + Fsin\theta ) = F cos\theta

F = \frac{U_x mg}{cos\theta - U_x sin\theta } \\\\= \frac{0.41 \times 25 \times 9.8 }{cos 30^\circ- 0.41 \times sin30 ^\circ}

= 151.96N

a) work done = F × d

= (151.96) × (6.5) cos30°

= 855.41 J

b) The increase in thermal energy of the block floor system will be equal to the work done by the worker

work done = F × d

= (151.96) × (6.5) cos30°

= 855.41 J

8 0
3 years ago
What is the mass of an asteroid with a speed of 200 m/s and a momentum of 2,000 kg m/s?
r-ruslan [8.4K]

Answer:

jhnnmhunn vgu fhbiy f

Explanation:

hjbgyvfvubhjgvg

3 0
2 years ago
Read 2 more answers
Two thin rectangular sheets (0.16 m x 0.44 m) are identical. In the first sheet the axis of rotation lies along the 0.16-m side,
malfutka [58]

Answer:

t'=1.124s

Explanation:

I_b*a_b=I_a*a_a

a_a=\frac{w_f}{t'}

a_b=\frac{w_f}{t}

I_b*\frac{w_f}{t}=I_a*\frac{w_f}{t'}

I_b*\frac{1}{t}=I_a*\frac{1}{t'}

I=\frac{1}{3}*M*r^2

I_a=\frac{1}{3}*M*r_a^2

I_b=\frac{1}{3}*M*r_b^2

\frac{1}{3}*M*r_b^2*\frac{1}{t}=\frac{1}{3}*M*r_a^2*\frac{1}{t'}

t'=(\frac{r_a}{r_b})^2 *t

t'=(\frac{0.16m}{0.44m})^2*t

t'=\frac{16}{121}*8.5s

t'=1.124s

7 0
3 years ago
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