The height of the ball when lifted is given by 7sin(25)=2.96
the gravitational energy is mgh, the kinetic is (1/2)mv². We can set these equal since the pendulum doesn't lose much energy
mgh = (1/2)mv²
we can divide by m (since we don't have it anyways)
gh = v²/2
v=√(gh/2) = √(9.81*2.96/2)=3.8m/s.
Not exactly one of your choices, but the right one none the less
On an average the adult human eyeball weighs 0.25oz or 7.5grams
Answer: By moving heat from the equator toward the poles, ocean currents play an important role in controlling the climate. Ocean currents are also critically important to sea life.
Explanation: Plzz mark me as brainliest !!
From the calculation, the wavelength of the waves is about 264 nm and belongs to the ultraviolet spectrum.
<h3>What is photoelectric effect?</h3>
The term photoelectric effect can be used to describe the loss of electron from the surface of a metal. Given that; KE = E - W, where;
KE = kinetic energy of the emitted photoelectron
E = energy of the photon
W = work function of the metal
λ= hc/E
λ=
λ= or 264 nm
Learn more about wavelength:brainly.com/question/13533093
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Answer:
A <u>scientific model</u> is a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes. Scientists seek to identify and understand patterns in our world by drawing on their scientific knowledge to offer explanations that enable the patterns to be predicted.