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3 years ago

As part of his meal, a workman has a cup containing a hot drink.

Physics

1 answer:

GuDViN [60]3 years ago

8 0

The second one since convection is the process by which heat is transferred from a solid surface to a non solid

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The distance between pole and position of image can denoted by___<br>a)u. b)v. c)R. d)C

soldier1979 [14.2K]

Answer:

b) v

Explanation:

the distance between pole and position of image can denoted by <u>v</u>

5 0

3 years ago

Cuales son dispositivos de salida?

Jobisdone [24]

Answer:

el monitor,las impresoras y las memorias portátiles

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3 years ago

The center of mass of a 0.30-kg (non-uniform) meter stick is located at its 45-cm mark. What is the magnitude of the torque (in

lbvjy [14]

Answer:

The magnitude of the torque due to gravity if it is supported at the 28-cm mark is 0.5 N-m.

Explanation:

Given that,

Mass of the meter stick, m = 0.3 kg

Center of mass is located at its 45 cm mark.

We need to find the magnitude of the torque due to gravity if it is supported at the 28-cm mark. Torque acting on the object is given by :

$\tau=r\times F\\\\\tau=(45-28)\times 10^{-2}\times 0.3\times 9.79\\\\\tau=0.499\ N-m$

$\tau=0.5\ N-m$

So, the magnitude of the torque due to gravity if it is supported at the 28-cm mark is 0.5 N-m.

6 0

4 years ago

A 1000-kg car traveling at 70 m/s takes 3 m to stop under full braking. the same car under similar road conditions, traveling at

azamat

We assume $a=const$ (acceleration is constant. We apply the equation
$v^2=v0^2+2as$ where s is the distance to stop $v=0(m/s)$ . We find the acceleration from this equation
$a=-v0^2/(2s)=-70^2/(2*3) =-816.7 (m/s^2)
$
We know the acceleration, thus we find the distance necesssary to stop when initial speed is $v=140 (m/s)$
$s=-v0^2/(2a) =140^2/(2*816.7)=12 (m)$

5 0

4 years ago

A simple lie detector consists of an electric circuit, often from one finger to another. A sensitive meter shows the current tha

liq [111]

Answer: Reduction in skin resistance as a result of increased perspiration leading to conduction.

Explanation:

A lie detector is a machine used to detect when someone is lying.

This is so because when an individual lies, there is an increase in heart beat which causes an increase in sweating. As the the individual sweats there is a reduction in the resistance at skin surface leading to current conduction across the connected cables.

8 0

3 years ago