Activation Energy....

1 answer:

3 0

C. relies on others to keep you motivated toward meeting your goals. The person isnt really on task or atemptive but when others push him towards a goal, he unlocks his activation energy and releases his full motivation.

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3. A force is exerted on a positively-charged particle that moves the particle in the direction opposite to that of an electric

NikAS [45]

Answer:

a) The work done on the particle has a positive sign.

Explanation:

When a positive charge is placed in a electric field , a force is exerted by electric field along the direction of the electric field . But the external force is acting on it so that displacement is opposite to the field . That means the external force is acting opposite to electric force on the charged particle.

The displacement is along the external force applied so both force and displacement are positive . Hence work done is positive .

Work done by electric field is negative , because displacement and electric force are opposite.

8 0

3 years ago

According to the exercise principle of balance, a workout should __________.

xxMikexx [17]

a. address all components of fitness

According to the exercise principle of balance, a workout should address all components of fitness.
NOT:
b. focus on balance and coordination
c. target specific areas for improvement 
d. vary exercise activities over time

6 0

3 years ago

Read 2 more answers

If a boat and its riders have a mass of 900 kg and the boat drifts in at 1.4 m/s how much work does sam do to stop it?

Rama09 [41]

The initial kinetic energy of the boat and its rider is
$K_i = \frac{1}{2} mv_i^2 = \frac{1}{2}(900 kg)(1.4 m/s)^2=882 J$

After Sam stops it, the final kinetic energy of the boat+rider is
$K_f = 0 J$
because its final velocity is zero.

For the law of conservation of energy, the work done by Sam is the variation of kinetic energy of the system:
$W=K_f-K_i =0-882 J=-882 J$
where the negative sign is due to the fact that the force Sam is applying goes against the direction of motion of the boat.

6 0

3 years ago

The acceleration due to gravity on the surface of Mars is about one third the acceleration due to gravity on Earth’s surface. Th

Lorico [155]

1/3 the weight than it is on earth, duh

3 0

3 years ago

Read 2 more answers

Does anyone know this one? Thanks

Inessa [10]

Answer:

$3.844\,*\,10^5$

So a=3.844 and b=5

Explanation:

Scientific notation requests to write a number using powers of ten as a factor accompanying a real number (a) between 1 and smaller than 10 that contains the digits to exactly represent the original number. So in this case, the number 384,400 can be written as:

$384,400=3.844 \,*\,100,000= 3.844 \,*\,10^5$

with a=3.844, and "5" as the exponent of ten (so b=5)

6 0

3 years ago