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Lesechka [4]
3 years ago
8

Lucas left a metal bowl and a wooden bowl outside overnight. The next morning, he picked up the bowls to bring them inside. He n

oticed that the metal bowl felt much cooler than the wooden bowl. His father explained that both bowls were actually the same temperature. Which statement best describes why the metal bowl felt cooler even though the bowls were the same temperature?
A
Wood transfers heat away from the skin by convection, creating the sensation of warmth.

B
Metal removes moisture from the skin by absorption, creating the sensation of coolness.

C
Metal transfers heat away from the skin by conduction, creating the sensation of coolness.

D
Wood transfers heat to the skin by radiation, creating the sensation of w
Physics
1 answer:
kipiarov [429]3 years ago
8 0

Answer: C. Metal transfers heat away from the skin by conduction, creating the sensation of coolness.

Explanation: The skin releases heat into the metal bowl since there is a difference in temperature between the two objects. So heat is taken away from the hand abd transfers into the metal bowl by conduction creating a cooler sensation.

You might be interested in
What is the number of electrons to come be held in the first orbit closest to the nucleus
Mariulka [41]
In the first shell there can be a maximum of 2 electrons, then 8o in the second one and 8 in the third one.
6 0
3 years ago
I need to know the correct answer please ?
mrs_skeptik [129]

Answer:

675 Pa.

Explanation:

F = 5+2cos(15t) kN

Area (a) = 8*10-3 m2

Now at t =4 sec

            F= 5+2cos(60)

             = 5+2*0.5

              = 6  kN

Now ,force efficiency is 90%.

Hence,the effectively transmitted force,

            Fe = 0.90*6

                = 5.4 kN

Hence,pressure is given as,

            P = Fe/a

                = 5.4*10^3/(8 *10^-3))

              P = 675 Pa....answer

6 0
4 years ago
An iron robot falls from rest at a great height. neglecting air resistance, what is its speed after it has fallen for 3.5 second
algol13
In an uniformly accelerated motion, the velocity of the object follows the law:
v(t) = v_0 + at
where v_0 is the initial velocity, a the acceleration and t the time.

In our problem, the robot starts from rest, so the initial speed is zero: v_i =0. The robot is in free fall, so the acceleraion is the gravitational acceleration g=9.81 m/s^2. therefore, after a time t=3.5 s, the velocity is 
v(3.5 s)= 0 + (9.81 m/s^2)(3.5 s)=34.3 m/s
6 0
4 years ago
Calculate the acceleration of a bus that speed up from 20ms-1 to 40ms-1 in 8 seconds?​
Anastaziya [24]

Answer:

2.5 ms^-2

Explanation:

acceleration

= (final velocity - initial velocity)/time

= [(40m/s) - (20m/s)]/8s

= (20m/s)/8s

= 5/2 m/s²

= 2.5 m/s²

= 2.5 ms^-2

3 0
3 years ago
If a train travel from Addis Ababa to Dire Dawa at a constant velocity of 400Km/hr and the to Djibouti at a constant velocity of
madreJ [45]

The value of V is 640 km/hr.

<h3>What is Average velocity?</h3>

Average velocity is the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.

To calculate the value of V from the question, we use the formula below.

  • V' = (V+U)/2............ Equation 1

Making V the subject of the equation

  • V = 2V'-U.............. Equation 2

From the question,

⇒ Given:

  • V' = 520 km/hr
  • U = 400 km/hr

Substitute these values into equation 2

  • V = (520×2)-400
  • V = 640 km/hr

Hence, the value of V is 640 km/hr.

Learn more about average velocity here: brainly.com/question/4931057

#SPJ1

4 0
2 years ago
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