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1 year ago

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A 1.47-newton baseball is dropped from a height of 10.0 meters and falls through the air to the ground. The kinetic energy of th

e ball is 12.0 joules the instant before the ball strikes the ground. The maximum amount of mechanical energy converted to internal energy during the fall is_________.

2 answers:

vagabundo [1.1K]1 year ago

8 0

Answer:

The maximum amount of mechanical energy converted to internal energy during the fall is 26.7 joules

Explanation:

Potential Energy (PE) = weight of baseball × height = 1.47N × 10m = 14.7Nm = 14.7 joules

Kinetic Energy (KE) = 12 joules

Maximum amount of mechanical energy converted to internal energy during the fall = PE + KE = 14.7 joules + 12 joules = 26.7 joules

Vedmedyk [2.9K]1 year ago

7 0

Answer:

ΔE<em>internal </em>= - 2.7 J

Explanation:

Given

W = m*g = 1.47 N

h<em>initial</em> = 10.0 m

K<em>final</em> = 12.0 J

We can apply

ΔE = ΔE<em>internal</em>

then

ΔE = (K<em>final</em> + U<em>final</em>) - (K<em>initial</em> + U<em>initial</em>)

⇒ ΔE = (K<em>final</em> + 0 J) - (0 J + U<em>initial</em>) = K<em>final </em>- U<em>initial</em>

⇒ ΔE = K<em>final</em> - (W*h<em>final</em>) = 12 J - (1.47 N*10.0 m)

⇒ ΔE = 12 J - 14.7 J = - 2.7 J

then

ΔE<em>internal </em>= - 2.7 J

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here $v_0=0$

$697=723\cdot (\frac{343-0}{343+v_s})$

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i.e.fork acquired a velocity of $12.8 m/s$

distance traveled by fork is given by

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where v=final velocity

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2 years ago

A metal sphere of radius 10 cm carries a charge of +2.0 μC uniformly distributed over its surface. What is the magnitude of the

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Answer:

$8.0\cdot 10^5 N/C$

Explanation:

Outside the sphere's surface, the electric field has the same expression of that produced by a single point charge located at the centre of the sphere.

Therefore, the magnitude of the electric field ar r = 5.0 cm from the sphere is:

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where

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2 years ago

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Answer:

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Conduction phenomenon of charging is the process of charging in which two bodies are made in contact with each other so that charges are transferred due to potential difference of two bodies.

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It models conduction because the painter represents a charged object and the paint represents electrons that are transferred through contact.

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2 years ago

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s=26.3m/s

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C. 7.9-1.75=difference of 6.15m/ $s^{2}$

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1 year ago

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Answer:

a. $a. \ \frac{7}{25}$

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$P(A_i)=3/5,\ P(A_2|A_1)=4/5,\ \ P(A_2|D_1)=2/5\\\\\\=P(A_1D_2)+P(D_1A_2)\\\\=\frac{3}{5}\times\frac{1}{5}+\frac{2}{5}\times\frac{2}{5}\\\\=\frac{7}{25}$

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b.Find the probability that both photo detectors in a pair are defective,P(D1D2):

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2 years ago