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4 years ago

Improving muscular strength and endurance slows bone density loss. Tf

1 answer:

5 0

true.A study has been conducted and suggested that indeed improving muscular strength and endurance or exercising can enhance bone density and stop it from declining whether its due to accidents or old age. Also, because this practice is needed to have stronger and more healthier bones, exercising is always a necessity and should be a habit.

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Which is an example of a mixture?

fgiga [73]

The answer is: B. Trail Mix

7 0

3 years ago

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13. A transformer has a primary coil with 600 turns and a secondary coil with 300 turns. If the output voltage is 320 volts, wha

vivado [14]

His is a step down transformer since n(primary) is greater than n(seconcary). You relate the input voltage with the ouput voltage with the following equation:

Vout = n2/n1*Vin (n2/n1 is essentially your 'transfer function' that dictates what a specified input would produce) 

Solving the equation: 

Vin = Vout*n1/n2 = (320V)*(600/300) = 640 V 

This is checked by seeing if Vin is greater than Vout, which it is for a step down transformer.

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3 years ago

A fish in an aquarium with flat sides looks out at a hungry cat. To the fish, does the distance to the cat appear to be less tha

lakkis [162]

Answer:

p = -q

he distance is equal to the current distance, so the distance does not change

Explanation:

For this exercise we can solve it using the equation of the constructor

1 / f = 1 / p + 1 / q

where f is the focal length, p the distance to the object and q the distance to the image

For a flat surface the radius is at infinity, therefore 1 / f = 0, which implies

1 / p = - 1 / q

p = -q

Therefore the distance is equal to the current distance, so the distance does not change

7 0

3 years ago

A toy car moves around a circular track at constant speed. It suddenly doubles its speed — a change of a factor of 2. As a resul

Zigmanuir [339]

Answer:

option B

Explanation:

given,

toy car is moving in circular track

speed is doubled— a change of a factor of 2

to find change in factor of acceleration

radius doesn't change

centripetal acceleration formula

= $\dfrac{v^2}{r}$

velocity is change in factor of 2

so acceleration will be change at the factor of

= $\dfrac{(2v)^2}{r}$

= 2² = 4

so the correct answer is option B

4 0

4 years ago

Which force diagram accurately represents a satellite in orbit around Earth?

Anit [1.1K]

Answer:

First choice

Explanation:

A satellite in orbit around Earth experiences only one force: the gravitational attraction exerted by the Earth on it. This force is labelled with $F_g$ . In space, there are no other forces acting on the satellite.

The force of gravity acts as centripetal force, "pulling" the satellite towards the centre of its circular orbit. The inertia of the satellite (which has an initial velocity) tends to keep it moving straight, so the combination of these two effects (inertia and force of gravity) results into the circular motion of the satellite.

5 0

3 years ago

Read 2 more answers