A bodybuilder deadlifts 215 kg to a height of 0.90 m. If he deadlifts this weight 10 times in 45 s, the power exerted is 421 W (b.)
<h3>What is power?</h3>
In physics, power (P) is the work (W) done over a period of time.
- Step 1. Calculate the work done by the bodybuilder each time.
The bodybuilder lifts a 215 kg (m) weight to a height of 0.90 m (h). Being the gravity (g) of 9.81 m/s², we can calculate the work done in each lift using the following expression.
W = m × g × h = 215 kg × 9.81 m/s² × 0.90 m = 1.9 × 10³ N
- Step 2. Calculate the work done by the bodybuilder over 10 times.
W = 10 × 1.9 × 10³ N = 1.9 × 10⁴ N
- Step 3. Calculate the power exerted by the bodybuilder.
The bodybuilder does a work of 1.9 × 10⁴ N in a 45-s span.
P = 1.9 × 10⁴ N/45 s = 421 W
A bodybuilder deadlifts 215 kg to a height of 0.90 m. If he deadlifts this weight 10 times in 45 s, the power exerted is 421 W (b.)
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Answer:
B. Electrons are transferred from the fur to the plastic rod.
Explanation:
Triboelectricity or friction charging refers to the ability of materials to gain or lose electrons as a result of rubbing them against something. This phenomenon has been observed in the case of rubbing plastic rod against fur, or glass rod against silk.
In the context of rubbing plastic rod against fur, what happens is that the fur which has an excess of charges loses electrons to the plastic rod. This makes the plastic rod to become positively charged, and the fur, negatively charged.
Answer: In this situation , the myocardial infarction is the medical diagnosis of the patient.
Explanation:
Medical diagnosis is the various steps that are being taken by a medical personnel to disease or condition of a patient with respect to the signs and symptoms observed. The steps taken by the medical personnel includes:
--> the Medical history of the patient,
--> physical examination is carried out on the patient.
--> diagnostic tests are equally performed..
Myocardial infarction which is also called heart attack is the medical diagnosis given when a blood clot blocks blood flow to the heart. In the physical examination of the patient, shortness of breath is a common signs of the condition. Hope this helps, thanks!
Answer:
B. Marginal cost equals long-run average total cost.
Explanation:
The zero profit condition implies that entry continues until all firms are producing at minimum long run average total cost. Since the marginal cost curve cuts the long run average total cost curve at its minimum point, marginal cost and long run average total cost must be equal in long run equilibrium.
Answer:
Ф6 = 3 Wb
Explanation:
the flux is positive when N is odd and positive when N is even so we can write the flux through the all side as
∑ N=1, to5
∑ -1 ^N Ф N * Ф6 =0
∑ -1 ^ N * Ф6 =0
Where :
ФN=N
Replacing and operated so
-1 Wb +2 Wb - 3 Wb + 4Wb - 5Wb + Ф6=0
Ф6 - 3Wb = 0
Ф6 = 3 Wb