Which would help you perform a basketball skill well with<br> speed?

A force of 60 N is used to stretch two springs that are initially the same length. Spring A has a spring constant of 4 N/m, and

ad-work [718]

We can calculate the length of each spring by using the relationship:
$F=kx$
where
F is the force applied to the spring
k is the spring constant
x is the length of the spring (measured with respect to its rest position)

Re-arranging the equation, we have
$x= \frac{F}{k}$

The force applied to both spring is F=60 N. Spring A has spring constant of k=4 N/m, therefore its length with respect to its rest position is
$x_A= \frac{F}{k_A}= \frac{60 N}{4 N/m}=15 m$
Spring B has spring constant of k=5 N/m, so its length with respect to its rest position is
$x_B= \frac{F}{k}= \frac{60 N}{5 N/m}=12 m$

Therefore, the correct answer is
<span>D.Spring A is 3 m longer than spring B because 15 – 12 = 3.</span>

5 0

3 years ago

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Why current remains same in series combination of resistors in all resistors and p.d. remains different?

IgorC [24]

Current at all points of a series circuit must be the same, because there's no place in the circuit where electrons are being manufactured, and no place where they're leaking out and falling on the floor. The nimber of electrons that leaves the loop is the same number that entered it. I'm not sure what is nmeant by "p.d. remains different" .

4 0

4 years ago

a hiker in africa discovers a skull that contains 43% of its original amount of c-14 Find the age of the skull to the nearest ye

11Alexandr11 [23.1K]

The amount of C-14 at time t is
$N(t) = N_{0} e^{-Kt}$
where
N₀ = inital amount of C-14
t = years
K = 0.0001 = 10⁻⁴

When the skull was discovered, the amount of C-14 contained 43% of N₀.
Therefore
$e^{-10^{-4}t} = 0.43 \\\\ -10^{-4} t = ln(0.43) \\\\ t = - \frac{ln(0.43)}{10^{-4}} =8439.7 \, years$

Answer:
The age of the skull s 8440 years (nearest integer)

8 0

4 years ago

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Hello random people who use this app

ddd [48]

Answer:

Hello stranger I don't know

Explanation:

._____.

8 0

3 years ago

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Models of four atoms are shown as figures A, B, C, and D. Which two atoms represent isotopes of the same element?

zvonat [6]

The identity of the element is determined by the number of protons
in the nucleus of each atom.

If two atoms have the same number of protons in their nucleii
(nucleuses) but different numbers of neutrons, then they're both
atoms of the same element, but their atomic masses are different,
and they're called isotopes of the element.

In the picture, atoms 'A' and 'B' each have 3 protons in the nucleus,
so they're both atoms of Lithium. But the number of neutrons is
different, so 'A' and 'B' are different isotopes of Lithium.

Also in the picture, atoms 'C' and 'D' each have 4 protons in the
nucleus, so they're both atoms of Beryllium. But the number of
neutrons is different, so 'C' and 'D' are different isotopes of Beryllium.

3 0

3 years ago

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Which would help you perform a basketball skill well with speed?