Answer:
Continuous random variable
Explanation:
The distance that baseball travels after being hit is a random variable and it assume any real value defined on the sample space.
The distance is measurable and thus is continuous random variable because continuous variable cannot be counted but could be measured.
Answer:
none of the above
Explanation:
The actual answer is '91 protons'. In fact, the beta decay of the thorium-234 is the following:
where inside the nucleus of Thorium (90 protons), a neutron turns into an electron (the beta particle) + a proton. Therefore, the resulting nucleus (which is Protoactinium) has a total of 90+1 = 91 protons.
So, the correct answer would be '91 protons'.
A. The efficiency of the ramp is 54.6 %.
<h3>Velocity ratio of the ramp</h3>
V.R = distance moved by effort/distance moved by load = L/h
V.R = (6.12)/(1.53) = 4
<h3>Mechanical advantage of the ramp</h3>
M.A = Load/Effort
M.A = (451 x 9.8)/(2025)
M.A = 2.183
<h3>Efficiency of the ramp</h3>
E = (M.A / V.R) x 100%
E = (2.183 / 4) x 100%
E = 54.6 %
Thus, the efficiency of the ramp is 54.6 %.
Learn more about efficiency here: brainly.com/question/15418098
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The rate of energy absorption from the outdoor air is 4400 KJ/h
<u>Explanation:</u>
Coefficient of performance (COP), is an expression of the efficiency of a heat pump. When calculating the COP for a heat pump, the heat output from the condenser (Q) is compared to the power supplied to the compressor (W).
The coefficient of performance,
We replace the value in the equation with given data,
By making a conversion, we get
The energy balance,
Now, replace the values in the equation, we get