PHYSICS
HIGH SCHOOL

Answer:

Answer: she will have to increase the factor of current by 11

Explanation: The mathematical relationship between the strength of the magnetic field (B) created by a current carrying conductor with current (I) is given by the Bio-Savart law given below

B=

B=strength of magnetic field

I = current on conductor

r = distance on any point of the conductor from it center

u = permeability of magnetic field in space

from the question, the investigator is trying to keep a constant magnetic field meaning B has a fixed value such as the constants in the formulae, the only variables here are current (I) and distance (r). We can get this a mathematical function.

by cross multipying, we have

B* 2πr=I

by dividing through to make I subject of formulae, we have that

I =

B, 2π and are all constants, thus

= k(constant)

thus we have that

I =kr (current is proportional to distance assuming magnetic field strength and other parameters are constant)

thus we have that

=

=1cm and =11cm

=

thus =11*

which means the second current is 11 times the first current

HIGH SCHOOL

_______ is the idea that people should be more interested in advancing their lives on earth than in worrying about getting to heaven

The correct answer for the question that is presented is this one: "Theology." Theology is the idea that people should be more interested in advancing their lives on earth than in worrying about getting to heaven. Studying Theology requires a lot of faith from the learner.

HIGH SCHOOL

Tidal power can be generated by man without investing a lot of energy into the process. True False

Answer: True

Explanation: Tidal Power can be generated with with less efforts and investment. The tidal energy is generated by the help of the tidal energy generators.

These generators are fitted in underwater turbines which has high tidal movements, which are designed to capture the kinetic motion of the surging of ocean in order to produce electricity.

If only that were true, you would see tidal power stations

all up and down every coast by now.

COLLEGE

A 0.6 kg block attached to a spring of force constant 13.6 N/m oscillates with an amplitude of 9 cm. Find the maximum speed of the block. Answer in units of m/s. 003 (part 2 of 4) 10.0 points Find the speed of the block when it is 4.5 cm from the equilibrium position. Answer in units of m/s. 004 (part 3 of 4) 10.0 points Find its acceleration at 4.5 cm from the equilibrium position. Answer in units of m/s 2 . 005 (part 4 of 4) 10.0 points Find the time it takes the block to move from x = 0 to x = 4.5 cm. Answer in units of s.

Answer:

1) 0.43 meters per second

2) 0.21 meters per second

3) 1.02

4) 0.66 seconds

Explanation:

part 1

By conservation of energy, the maximum kinetic energy (K) of the block is at equilibrium point where the potential energy is zero. So, at the equilibrium kinetic energy is equal to maximum potential energy (U):

With m the mass, v the speed, k the spring constant and xmax the maximum position respect equilibrium position. Solving for v

part 2

Again by conservation of energy we have kinetic energy equal potential energy:

part 3

Acceleration can be find using Newton's second law:

with F the force, m the mass and a the acceleration, but elastic force is -kx, so:

part 4

The period of an oscillator is the time it takes going from one extreme to the other one, that is going form 4.5 cm to -4.5 cm respect the equilibrium position. That period is:

So between 0 and 4.5 cm we have half a period:

HIGH SCHOOL

A flock of geese is flying south for the winter. In order to maintain a “V” shape, each goose is flying at the same constant velocity. Which goose will have the most momentum? A) the goose with the least mass

B) the goose with the most mass

C) the goose that is behind all the others

D) the goose at the front of the "V" leading the way of the other geese

B the goose with most mass

this is because momentum=mass x acceleration

so a larger mass will give a larger momentum ( acceleration stays constant)

this is because momentum=mass x acceleration

so a larger mass will give a larger momentum ( acceleration stays constant)