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Korolek [52]
4 years ago
14

____________ occurs when heat is transferred to an object through direct contact with particles; an example would be the heat fr

om a stove transferring to your hand through the handle on a pot or pan.
a. conduction
c. convection
b. radiation
d. heat Please select the best answer from the choices provided A B C D
Physics
2 answers:
liraira [26]4 years ago
8 0

Answer: Option (a) is the correct answer.

Explanation:

A process in which there are two objects of different temperatures are kept together by touching each other then heat will flow from object with high temperature to low temperature is known a conduction.

Whereas a process when a fluid is heated and there occurs change material as cooler material (more dense) sinks at the bottom and hot material (less dense) rises at the top is known as convection.

On the other hand, when electromagnetic waves travel through space and energy from them heats an object without touching it is known as radiation.

Thus, we can conclude that conduction occurs when heat is transferred to an object through direct contact with particles; an example would be the heat from a stove transferring to your hand through the handle on a pot or pan.

Blizzard [7]4 years ago
7 0
Conduction occurs when heat is transferred to an object through direct contact with particles.
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If the density of water is 1000 kg/m², what is the pressure at the bottom of a swimming pool 2m
Xelga [282]
Pressure = height x density x gravity = 2 x 1000 x 9.8 = 19600 Pascal ( N / m^2 )
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3 years ago
A car travels West at 35 mph for a time period of 2.5 hours and then travels West at 55 mph for an additional time of 4.0 hours.
OlgaM077 [116]

The total distance travelled is 307.5 miles.

<h3>What is the distance covered?</h3>

We know that the distance covered can be obtained from the formula from speed since the motion all took place in the same direction.

Speed = distance/time

distance = speed * time

In the first case;

Distance =  35 mph  *  2.5 hours = 87.5 miles

In the second case;

Distance =  55 mph * 4.0 hours = 220 miles

Total distance = 87.5 miles + 220 miles = 307.5 miles

Hence the total distance travelled is 307.5 miles.

Learn more about total distance:brainly.com/question/20330990

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7 0
2 years ago
A toy mouse has a mass of 4 kg and kinetic energy of 32 J. What is its speed? A. 6 m/s B. 3 m/s C. 5 m/s D. 4 m/s
Svetach [21]

32/4= 8

8/2=4

Answer : D. 4 m/s

7 0
3 years ago
Read 2 more answers
A blue ball is thrown upward with an initial speed of 24.1 m/s, from a height of 0.5 meters above the ground. 2.9 seconds after
Aleks04 [339]

Answer:

1. Speed=0

2. 2.46 s

3.30.1 m

4. 22.0 m

5.1.004 s

Explanation:

We are given that

Initial speed of blue ball, u=24.1 m/s

Height of blue ball from ground y_0=0.5 m

Initial speed of red ball , u'=7.2 m/s

Height of red from ground=y'0=32 m

Gravity, g=9.81ms^{-2}

1.When the ball reaches its maximum height then the speed of the blue ball is zero.

2.v=0

v=u+at

Using the formula and substitute the values

0=24.1-9.81t

Where g is negative because motion of ball is against gravity

24.1=9.81t

t=\frac{24.1}{9.81}=2.46s

3.y=y_0+ut+\frac{1}{2}at^2

Using the formula

y=0.5+24.1(2.46)-\frac{1}{2}(9.81)(2.46)^2

y=30.1 m

4.Time of flight for red ball=3.77-2.9=0.87s

y'=32-7.2(0.87)-\frac{1}{2}(9.81)(0.87)^2

y'=22.0m

Hence, the height of red ball 3.77 s after the blue ball is 22.0 m.

5.According to question

0.5+24.1(t+2.9)-\frac{1}{2}(9.81)(2.9+t)^2=32-7.2t-\frac{1}{2}(9.81)t^2

0.5+24.1t+69.89-4.905(t^2+5.8t+8.41)=32-7.2t-4.905t^2

0.5+24.1t+69.89-4.905t^2-28.449t-41.25105=32-7.2t-4.905t^2

0.5+69.89-41.25105-32=-24.1t+28.449t-7.2t

-2.86105=-2.851t

t=\frac{2.86105}{2.851}=1.004 s

Hence,  1.004 s  after the blue ball is thrown  are the two balls in the air at the same height.

8 0
3 years ago
What is a hologram and on what physics principle is it based
Flura [38]

The holographic principle is a principle of string theories and a supposed property of quantum gravity that states that the description of a volume of space can be thought of as encoded on a lower-dimensional boundary to the region preferably a light like boundary like a gravitational horizon.

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3 years ago
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