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3 years ago

Are predators or their prey more likely to be successful?

Physics

2 answers:

puteri [66]3 years ago

8 0

Predators are more likely to be more successful because they are typically bigger and more powerful than the prey

mihalych1998 [28]3 years ago

3 0

Predator because they are the one’s preying on the animals, the chances of the prey getting away is slim.

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A penny dropped into a wishing well reaches the bottom in 2.50 seconds. What was the velocity at impact?

12345 [234]

Answer:

Taking it was dropped with inital velocity of 0m/s.

v = u+at

v = 0 + 9.8*1.5

v = 14.7s

(a=9.8m/s^2 << That's the acceleration due to gravity)

Explanation:

4 0

4 years ago

Read 2 more answers

A copper transmission cable 140 {\rm km} long and 12.5 {\rm cm} in diameter carries a current of 115 {\rm A}.

SpyIntel [72]

Answer:

1. $V=22.0407\ V$

2. $Q=9126837\ J$

Explanation:

Given:

length of copper cable, $l=140\ km=1.4\times 10^5\ m$

diameter of copper cable, $d=12.5\ cm=0.125\ m$

current through the copper wire, $i=115\ A$

We have the resistivity of copper, $\rho=1.68\times10^{-8}\ \Omega.m$

We know that the resistance of a wire is given as:

$R=\rho.\frac{l}{a}$

where:

$a=$ cross sectional area of the wire

$R=1.68\times 10^{-8}\times\frac{140000}{\pi.\frac{0.125^2}{4} }$

$R=0.1917\ \Omega$

Now from the Ohm's law:

$V=R.i$

$V=0.1917\times 115$

$V=22.0407\ V$

From the Joules law the thermal energy generated as an effect of electrical energy is mathematically given as:

$Q=i^2.R.t$

where:

$t=$ time duration for which the current flows

$Q=115^2\times 0.1917\times 3600$ (∵ we have 3600 seconds in 1 hour)

$Q=9126837\ J$

5 0

3 years ago

7. What is the acceleration of the box? a. 2.5 m/s2 b. 4 m/s2 c. 6 m/s2 d. 10 m/s2

faust18 [17]

This is your answer
b) 4m/s2
Here’s my work

6 0

3 years ago

Which of the following is NOT true of all the inner planets?

Artist 52 [7]

Hi there! :)

$\large\boxed{\text{B. They are called gas giants.}}$

In the solar system, we can categorize the planets as such:

Inner planets: Mercury, Venus, Earth, Mars

Outer planets: Jupiter, Saturn, Uranus, Neptune

The Inner planets are the only planets that consist of solid rock. They also do not have rings and have impact craters due to their early formation.

In comparison, all of the outer planets are primarily made up of gaseous material and contain rings.

Therefore, the correct choice is B.

7 0

3 years ago

Please help me, thank you

Mnenie [13.5K]

Answer:

Explanation:

7 0

3 years ago