PHYSICS HIGH SCHOOL

How much energy is contained in the mass of a 60-kilogram person?

Answers

Answer 1
Answer:


I could tell you the energy if you can tell me the acceleration and height above earth's surface.
Answer 2
Answer: the energy in the body depends on the work that had done and the type of food he she had if it is in a 60 kg person / 40 kg person.

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When a woman stands with two feet on a scale, the scale reads 280 N. When she lifts one foot, the scale reads A. less than 280 N. B. more than 280 N. C. 280 N.

Answers

The right answer is  280 N.

What is total weight on the scale?

When a woman stands with two feet on a scale, the scale reads 280 N and when she lifts one foot, the scale also reads 280 N because the weight of the other leg also comes on the one leg.

First, the whole weight of the body depends on two feet but when the second feet is lifted, the weight of the whole body including the lifted feet comes on the single feed so we can conclude that the right answer is  280 N

Learn more about scale here: brainly.com/question/2826496
c is the correct answer

A scientist wants to learn about Earth's oceans. Which of the following spheres should she most directly study? (2 points)
Oa
Atmosphere
Ob
Cryosphere
Oc
Geosphere
Od
Hydrosphere

Answers

Hydrosphere - all the waters on the earth’s surface.

Example of a single displacement reaction is

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The reaction of zinc withhydrochloric acid. Zn + 2HCl → H2 + ZnCl2. In here, zinc, an element, willreplace the halogen chlorine in the compound hydrochloric acid to form ahydrogen gas and zinc chloride molecule.

Trên bóng đèn có ghi là 12v -6w. Khi đèn sáng bình thường thì dòng điện chạy qua đèn có cường độ là

Answers

Answer:

I=P/U=6/12=0.5(A)

Explanation: P=UI ( CÔNG SUẤT = HIỆU ĐIỆN THẾ NHÂN VỚI C Đ D Đ)

a coil has n turns enclosing an area of a. in a physics laboratory experiment, the coil is rotated during the time interval δt from a position in which the plane of each turn is perpendicular to earth's magnetic field to one in which the plane of each turn is parallel to the field. the magnitude of earth's magnetic field at the lab location is b.

Answers

The correct answer for the question that is being presented above is this one:

Phi = BAsin(theta) 
1. Phi(i) = BA 
2. Phi(f) = 0 
3. EMF = N(phi(i)-phi(f))/deltat

Here are the follow-up questions:

1. What is the total magnitude Phi_initial of the magnetic flux through the coil before it is rotated? 
2. What is the magnitude Phi_final of the total magnetic flux through the coil after it is rotated? 
3. What is the magnitude of the average emf induced in the coil?

What is the velocity of a 500-kilogram elevator that has 4,000 joules of energy?

Answers

The velocity of a 500-kilogram elevator that has 4,000 joules of energy is 4m/s.

KINETIC ENERGY:

  • The kinetic energy of a substance is its energy during motion. It can be calculated using the formula below:

K.E = ½m.v²

Where;

m = mass of the elevator (kg)

v = velocity of the elevator (m/s)

  • According to this question, the energy of the 500kg elevator is given as 4,000 joules, hence, the velocity can be calculated as follows:

V = √K.E × 2/m

V = √4000 × 2/500

V = √8000/500

V = √16

V = 4m/s

  • Therefore, the velocity of a 500-kilogram elevator that has 4,000 joules of energy is 4m/s.

Learn more: brainly.com/question/10703928?referrer=searchResults
The Energy is Kinetic Energy.

Kinetic Energy = 1/2*mv²,  Where m is mass in kg, v is velocity in m/s

Energy is 4000 Joules,  v = ?
mass, m = 500kg

1/2*mv² = E

1/2*500*v² = 4000

v² = (2*4000) / (500)     Using a calculator

v² = 16     Taking square root

v = √16

v = 4 

Velocity  of object is 4 m/s.
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