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2 years ago

Someone help me with this PE question?

Physics

2 answers:

deff fn [24]2 years ago

8 0

I think it is your core

katovenus [111]2 years ago

3 0

Answer:

Your abdominals

Explanation:

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The hierarchy of needs is the spectrum of needs ranging from basic ________ needs to ________ needs to self-actualization.

Zanzabum

The hierarchy of need was developed by Maslow. The pyramid is a motivational theory in psychology that argues that people is seeking to meet successively higher needs. The base of the pyramid is for the physiological needs to safety, belongingness, esteem, and finaly self-actualization.

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3 years ago

A ping pong ball has a mass of about 2.45 grams. Suppose that Forrest Gump hits the ball across the table with a speed of about

MrMuchimi

Answer:

0.0196J

Explanation:

KE equation is 1/2*m*v^2

when pluged in above numbers...

0.5*0.00245*4*4=0.0196J

6 0

3 years ago

Explain the equations given in the Michelson-Morley experiment.

Naya [18.7K]

Michelson-Morley experiment, an attempt to detect the velocity of Earth with respect to the hypothetical luminiferous ether, a medium in space proposed to carry light waves. First performed in Germany in 1880–81 by the physicist A.A. Michelson, the test was later refined in 1887 by Michelson and Edward

3 0

3 years ago

Read 2 more answers

A relaxed biceps muscle requires a force of 25.4 N for an elongation of 3.20 cm; under maximum tension, the same muscle requires

beks73 [17]

Answer:

Y = 31750 Pa = 31.75 KPa (For 24.5 N force)

Y = 312500 Pa = 312.5 KPa (For 250 N force)

Explanation:

Since the elongation is constant. Therefore, the strain will remain the same in both cases:

$Strain = \frac{Elongation}{Original\ Length}\\\\Strain = \frac{0.032\ m}{0.2\ m}\\\\Strain = 0.16$

FOR A FORCE OF 25.4 N:

$Stress = \frac{Force}{Area}\\\\Stress = \frac{25.4\ N}{0.005\ m^2}\\\\Sress = 5080\ Pa = 5.08\ KPa$

Now, for Young's Modulus:

$Y = \frac{Stress}{Strain}\\\\Y = \frac{5080\ Pa}{0.16}$

Y = 31750 Pa = 31.75 KPa

FOR A FORCE OF 520 N:

$Stress = \frac{Force}{Area}\\\\Stress = \frac{250\ N}{0.005\ m^2}\\\\Sress = 50000\ Pa = 50\ KPa$

Now, for Young's Modulus:

$Y = \frac{Stress}{Strain}\\\\Y = \frac{50000\ Pa}{0.16}$

Y = 312500 Pa = 312.5 KPa

8 0

3 years ago

How is geothermal energy trapped? state a draw back of this kind of energy.

Dmitriy789 [7]

Answer:

Geothermal energy can be trapped using geothermal plants that utilizes steam escaping from the earth surface to make electricity.

The limitations include :

depletion of the geothermal source
high costs of investments required for geothermal systems

Explanation:

Geothermal energy originates in form of heat/steam escaping from the inner parts of the earth surface. The steam trapped is converted to electricity through turbines. The hot water pumped by heat pumps can be used to heat homes or for heating purposes in industries.

The limitations of geothermal energy are high initial capital costs for installing the systems, depletion of geothermal sites after sometime, environmental concerns due to greenhouse gases emissions and land requirements for geothermal projects.

3 0

3 years ago