1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marina CMI [18]
3 years ago
13

A ball falls off of a 3m tall shelf. How long will it take for the

Physics
1 answer:
natali 33 [55]3 years ago
7 0

Answer:

0.8s

Explanation:

Given parameters:

Height of shelf  = 3m

Unknown:

Time it will take to hit the ground  = ?

Solution:

To solve this problem, we use the expression below;

         x  = ut + \frac{1}{2} gt²  

x is the height

u is the initial velocity  = 0m/s

g is the acceleration due to gravity  = 9.8m/s²

t is the time taken  = ?

Now insert the parameters and solve for t;

    3  = (0 x t) +( \frac{1}{2} x 9.8 x t²)

    3 = 4.9t²

       t² = 0.6

       t = 0.8s

You might be interested in
Picture question please answer do in 5 mins
alexandr402 [8]

Answer:

Can't see anything, please share clearly

4 0
3 years ago
Plzzz Help
m_a_m_a [10]

Answer:

The electromagnetic waves appear more blue in color.

Explanation:

Doppler's Effect: When a source moves with respect to the observer the frequency of the wave emitted from the source changes. If the source moves away from the observer, the frequency decreases and wavelength increases and vice versa.

Here the light source is moving towards the observer so the frequency will increase and wavelength will decrease. Thus the spectrum will shift towards the blue part. This is known as blue shift. The light wave will appear blue in color.

8 0
3 years ago
A very long conducting cylinder (length L) of radius R(R<R and (b)r
mina [271]

Answer:

Explanation:

We have to find electric potential V at a distance r.

a) For r>R,

The electric field in the cylinder is given by

E.A equating it to the other electric field given by

б.A/ε₀

Here the area of cylinder is given by= 2*3.14*r*L

While for the outside, the area= 2*3.14*R*L

Equating both, we get

E= бR/rε₀

Now,

The potential difference is given as:

ΔV= -бR/rε₀ and integrating right side with respect to dr under limits r and R.

Where ΔV= V₀-V

So solving we get

V₀=V-бR/ε₀ln (r/R)

b) For r<R i.e. inside the cylinder

There will be no electric field produced as E=0

So ultimately Vin= V

c) V=0 at r= infinity.

4 0
3 years ago
The universal force that is effective over the longest distance is called?
gulaghasi [49]
The answer is D. gravity
3 0
3 years ago
Which statement is true for particles of the medium of an earth quake p wave
katen-ka-za [31]
I am pretty sure that the only statement which  is true for particles of the medium of an earthquake P-wave is being shown in the option : b)vibrate parallel to the wave, forming compressions and rarefactions. As you know,  it can be formed in two ways : from alternating compressions and rarefactions or primary wave. I bet you will agree with me.

8 0
3 years ago
Other questions:
  • Please i need detailed explanation​
    6·1 answer
  • An accepted value for the acceleration due to gravity is 9.801 m/s2. In an experiment with pendulums, you calculate that the val
    15·1 answer
  • A train travels 77 kilometers in 4 hours, and then 76 kilometers in 2 hours. What is its average speed?
    10·1 answer
  • What is the photoelectric effect?
    13·2 answers
  • Please help me i give 60 point i need help now
    10·1 answer
  • Diffraction supports the:<br><br> A. wave theory of light.<br><br> B. particle theory of light.
    15·2 answers
  • A proton is accelerated from rest through a potential difference V0 and gains a speed v0. If it were accelerated instead through
    12·1 answer
  • A major contemporary learning view of personality which holds that personality traits result from a
    10·2 answers
  • Sonam and Wangchuk are taking part in a long jump event during their school's annual sports day. Sonam ran a few distances befor
    7·1 answer
  • A fighter plane is flying overhead at mach 1.20. What angle does the wave front of the shock wave produced make relative to the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!