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Anettt [7]
3 years ago
8

The crisis in Erikson’s identity versus role confusion stage of psychosocial development is that the individual must __________.

A. be creative, productive, and nurturing B. control one’s behavior in social situations beyond family C. realize who or what one wants to be D. form a close, intimate relationship with someone else
Physics
2 answers:
sergeinik [125]3 years ago
8 0

C. realize who or what one wants to be

den301095 [7]3 years ago
4 0

Answer:

c

Explanation: i took the test and got it right

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True or False: An example of an Isometric movement is a plank. please help 2 mins left!<br> PE
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Answer:

Yes

Explanation:

The plank (also called a front hold, hover, or abdominal bridge) is an isometric core strength exercise that involves maintaining a position similar to a push-up for the maximum possible time

5 0
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The study of motion is called ________
Salsk061 [2.6K]

The study of motion is called kinematics.

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A spring is pulled to 10cm and held in place with a force of 500N. What is the spring constant of the spring
MrMuchimi

Answer:

5000

Explanation:

F=ke where f is the force, k is the spring constant, e is the extension....all in standard units

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3 years ago
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Is it possible for a distance versus-time graph to be a vertical line?
Feliz [49]
If time is the x axis and distance is the y axis then yes, in the case that time is going by but distance remains the same.
4 0
3 years ago
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Your friend thinks that the escape speed should be greater for more massive objects than for less massive objects. Provide an ar
Brrunno [24]

Answer:

Concepts and Principles

1- Kinetic Energy: The kinetic energy of an object is:

K=1/2*m*v^2                                                         (1)  

where m is the object's mass and v is its speed relative to the chosen coordinate system.  

2- Gravitational potential energy of a system consisting of Earth and any object is:  

 U_g = -Gm_E*m_o/r*E-o                                   (2)  

where m_E is the mass of Earth (5.97x 10^24 kg), m_o is the mass of the object, and G = 6.67 x 10^-11 N m^2/kg^2 is Newton's gravitational constant.  

Solution  

The argument:  

My friend thinks that escape speed should be greater for more massive objects than for less massive objects because the gravitational pull on a more massive object is greater than the gravitational pull for a less massive object and therefore the more massive object needs more speed to escape this gravitational pull.  

The counterargument:  

We provide a mathematical counterargument. Consider a projectile of mass m, leaving the surface of a planet with escape speed v. The projectile has a kinetic energy K given by Equation (1):

K=1/2*m*v^2                                                         (1)  

and a gravitational potential energy Ug given by Equation (2):  

Ug = -G*Mm/R

where M is the mass of the planet and R is its radius. When the projectile reaches infinity, it stops and thus has no kinetic energy. It also has no potential energy because an infinite separation between two bodies is our zero-potential-energy configuration. Therefore, its total energy at infinity is zero. Applying the principle of energy consersation, we see that the total energy at the planet's surface must also have been zero:  

K+U=0  

1/2*m*v^2 + (-G*Mm/R) = 0

1/2*m*v^2 =  G*Mm/R

1/2*v^2 = G*M/R

solving for v we get

v = √2G*M/R

so we see v does not depend on the mass of the projectile

8 0
3 years ago
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