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Colt1911 [192]
3 years ago
5

A juggler throws a bowling pin straight up with an initial speed of 9.20m/s. How much time elapses before the pin reaches the ju

ggler's hands?
Physics
2 answers:
timama [110]3 years ago
8 0
v=v(0)+at

9.20=0+(9.81*t) |9.81 because the fall is due to gravity.

t= \frac{9.20}{9.81}

t=0.94seconds


adoni [48]3 years ago
3 0

Answer:

1.87 s

Explanation:

Initial speed of throw = 9.20 m/s

Net vertical displacement = 0

The bowling pin would be in free fall i.e. a = 9.8 m/s²

Use the second equation of motion:

s = ut + 0.5at²

0 = (9.20)t-0.5(9.8)(t²)

9.20 = 4.9 t

⇒t = 1.87 s

Thus, the total time of flight, the time elapses before the bowling pin falls in juggler's hand is 1.87 s.

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A toroidal coil of N turns has a central radius b and a square cross section of side a. Find its self-inductance.
Xelga [282]

Answer:

L = \frac{\mu_0 N^2 (a^2)}{2\pi b}

Explanation:

As we know that magnetic field due to torroid is given as

B = \frac{\mu_0 N i}{2\pi b}

this is approximately constant magnetic field along the axis of the torroid

now the flux linked with one coil of the torroid is given as

\phi = B.A

\phi = \frac{\mu_0 N i}{2\pi b}(a^2)

now total flux of N number of coils is given as

\phi_{total} = \frac{\mu_0 N^2 i(a^2)}{2\pi b}

now we know that self inductance is the property of coil in which flux of the coil will link with the current in the coil

So we know that

L = \frac{\phi}{i}

L = \frac{\mu_0 N^2 (a^2)}{2\pi b}

3 0
3 years ago
A seagull flying horizontally at 8.00m/s carries a clam with a mass of 300g in its beak. Calculate the total mechanical energy o
tekilochka [14]

Answer:

The total mechanical energy of the clam when the seagull is 30.0 m above the ground is 97.8 Joules

Explanation:

Given:

Mass =  300 g

speed =  8.00 m/s

Height =  30.0 m

To Find:

Total mechanical energy of the clam = ?

Solution:

The total mechanical energy is the sum of the kinetic energy of the clam  and its  potential energy

Kinetic energy, E_K = \frac{1}{2}mv^2

Where m is the mass and v is the velocity

Potential energy,E_P  = mgh

where

m is the mass

g is the gravitational constant and h is the height

Then

Mechanical energy E_M = \frac{1}{2}mv^2 +mgh

Converting g to kg we have

300 gram = 0.3 kg

On substituting the values,

E_M = \frac{1}{2}(0.3)(8.00)^2 +(0.3)( 9.8) (30.0)

E_M = \frac{1}{2}(19.2) + 88.2

E_M = 9.6 + 88.2

E_M = 97.8 J

7 0
4 years ago
Relate a car's suspension to harmonic motion
Lisa [10]
Relating a car homones
4 0
3 years ago
Read 2 more answers
How might the daily activities of a scientist studying the stars differ from a chemist, physicist, or biologist?
VashaNatasha [74]

Answer:

look at explanation

Explanation:

Chemist studies chemicals

A physciats studies physicals things

a biologst studies biology

and these are their jobs!!

5 0
3 years ago
A beam of light is emitted 8.6 cm beneath the surface of a liquid and strikes the air surface 7.2 cm from the point directly abo
Makovka662 [10]

Answer:

n = 1.56

Explanation:

The total reflection attempts occurs when a light beam passes from a medium with a higher index to a medium with a lower nest, at an angle where it occurs we can find them by the refractive relationship

             n₁ sin θ₁ = n₂ sin θ₂

             n1 = n2 / sin θ₁

For this relationship to be fulfilled, the liquid index must be greater than the air index divided by the sine of the critical angle

Let's use trigonometry to find angle

               tan θ = y / x

                θ = tan⁻¹ 7.2 / 8.6

                θ = 39.94º

         

                n₁ = 1 / sin 39.94

                n = 1.56

This is the refractive index of the liquid

4 0
3 years ago
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