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erica [24]
3 years ago
13

What is the mechanical advantage of a lever that is 20 meters

Physics
2 answers:
pav-90 [236]3 years ago
4 0

Answer:

5.765

Explanation:

ipn [44]3 years ago
3 0

Answer:

5.765

Explanation:

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In a photoelectric effect experiment, it is observed that violet light does not eject electrons from a particular metal. Next, r
liubo4ka [24]

Answer:

No ejection of photo electron takes place.

Explanation:

When a photon of suitable energy falls on cathode, then the photoelectrons is emitted from the cathode. This phenomenon is called photo electric effect.

The minimum energy required to just  eject an electron is called work function.

The photo electric equation is

E = W + KE

where, E is the incident energy, W is the work function and KE is the kinetic energy.

W = h f

where. h is the Plank's constant and f is the threshold frequency.

Now, when the violet light is falling, no electrons is ejected. When the red light is falling, whose frequency is less than the violet light, then again no photo electron is ejected from the metal surface.

6 0
3 years ago
1. Describe the components of the reflex arc
labwork [276]
The simplest arrangement of a reflex arc consists of the receptor, an interneuron (or adjustor), and an effector; together, these units form a functional group. Sensory cells carry input from the receptor (afferent impulses) to a central interneuron, which makes contact with a motor neuron.
3 0
3 years ago
Track lighting is not permitted to be installed less than ____________ above the floor unless it has an open-circuit voltage of
Liula [17]
B is the answer hope this helps
4 0
2 years ago
a 1.00 kg mass is placed at the free end of a compressed spring. The force constant of the spring is 115 N/m. The spring has bee
frosja888 [35]

Here 1 kg mass is hold against compressed spring

when it is released and reached to natural position it will start moving with certain speed

As per energy concept we will now say that potential energy stored in the spring will convert into kinetic energy of the block

so here we will say

U_{spring} = KE_{block}

\frac{1}{2}kx^2 = \frac{1}{2}mv^2

115(0.20)^2 = 1.00(v^2}

v = 2.145 m/s

so block will released with speed 2.145 m/s

8 0
3 years ago
Please help with this diagram as soon as possible.
melomori [17]
This is the answer .....

3 0
2 years ago
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