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2 years ago

Cognitive psychology deals with ____.

Physics

1 answer:

Elanso [62]2 years ago

3 0

Answer:

Explanation:

Because the main focus of cognitive psychology is on the metal processes that affect behavior

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Is CO2 a metal or nonmetal

Dafna1 [17]

non metal

co2 is a compound made up of carbon and oxygen which are both non metals, so co2 is a nonmetal. :)

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2 years ago

Read 2 more answers

A calorimeter is a container that is insulated from the outside, so a negligible amount of energy enters or leaves the container

Len [333]

Answer:

This is a heat balance question with negligible heat losses to the surroundings.

Sum of heat losses = Sum of the heat gains

We are required to find the final temperature of the calorimeter system T1?

we were given

C = specific heat capacities of Copper c, Water w, Ice i and Lead l

m = masses as mc = 0.1kg, mw = 0.16kg, mi=0.018kg, ml=0.75kg,

T = Temperature of the components, Lead Tl= 225C and at ambient pressure, Temp. To of the water, ice and copper = 25C

Since, at thermal equilibrium after adding the Lead, the lead temperature Tl decreases while copper, water and ice temp decrease, so we have respective heat losses 'q' as,

qc + qw + qi + ql =0

which means that

(mc x Cc x ΔTC) + (mw x Cw x ΔTC) + (mi x Ci x ΔTC) + (ml x Cl x ΔTC) = 0

(0.1x390x (T1 - 25)) + (0.16x4190x (T1 - 25)) + (0.018x4190x (T1 - 0)) + (0.750x130x (T1 - 225)) = 0

882.32T1 - 41558 = 0

T1 = 47.1K

Hence, the final temperature of the calorimeter system is 47.1K

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3 years ago

7.) A car starts from rest and accelerates

gizmo_the_mogwai [7]

It will take 20 seconds for the car to attain a speed of 34 m/s

Explanation:

Acceleration of an object is given by a = velocity/time.
Here, acceleration of the car = 1.7 m/s² and velocity = 34 m/s. Using these, find time.
Time = velocity/acceleration

= 34/1.7 = 20 s

So it takes 20 seconds to attain a speed of 34 m/s

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3 years ago

An 800-kg elevator is lifted vertically by a strong rope. Find the acceleration of

Alenkasestr [34]

Explanation:

Given that,

Mass of an elevator, m = 800 kg

It is lifted vertically by a strong rope

The equation of motion, when the elevator is lifted vertically up is :

T-mg = ma

a is the acceleration of the elevator

We need to find the acceleration of the elevator if the rope tension is :

(a) 9000 N

Put T = 9000 N,

T-mg = ma

$a=\dfrac{T-mg}{m}\\\\a=\dfrac{9000-800(10)}{800}\\\\=1.25\ m/s^2$

(b) 7840 N

Put T = 7840 N,

T-mg = ma

$a=\dfrac{T-mg}{m}\\\\a=\dfrac{7840-800(10)}{800}\\\\=-0.2\ m/s^2$

Put T = 2000 N,

T-mg = ma

$a=\dfrac{T-mg}{m}\\\\a=\dfrac{2000-800(10)}{800}\\\\=-7.5\ m/s^2$

Hence, this is the required solution.

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3 years ago

Which of the following statements is true?

Tema [17]

1...none of the other ones make sense

3 0

3 years ago