All categories

3 years ago

Which of the following statements is FALSE?

Physics

2 answers:

forsale [732]3 years ago

6 0

Answer:

Explanation:

this is false as heat always moves form a warm place to a cool place not the other way around

m_a_m_a [10]3 years ago

5 0

D because heat doesn’t move to warm places it makes things or places warm

You might be interested in

How deep in the ocean is the wreckage of the titanic?

Natalka [10]

Answer:

12,500 feet

Explanation:

5 0

4 years ago

Read 2 more answers

A railroad car of mass 3.45 ✕ 104 kg moving at 2.60 m/s collides and couples with two coupled railroad cars, each of the same ma

Alex

Answer:

a) 1.67 m/s

b) 23kJ

Explanation:

We need to apply the linear momentum conservation formula, that states:

$m1*v_{o1}+m2*v_{o2}=m1*v_{f1}+m2*v_{f2}$

in this case:

$3.45*10^4kg*2.60m/s+2*3.45*10^4kg*1.20m/s=3*m1*v_{f}\\v_f=1.67m/s$

the initital kinetic energy is:

$K_i=\frac{1}{2}*3.45*10^4kg*(2.60m/s)^2+2(\frac{1}{2}*3.45*10^4kg*(1.20m/s)^2\\K_i=167kJ$

and the final:

$K_f=3*\frac{1}{2}*3.45*10^4kg*(1.67m/s)^2\\K_f=144kJ$

The energy lost is given by:

$E_l=|K_f-K_i|\\E_l=23kJ$

8 0

3 years ago

A man stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. Th

LiRa [457]

Answer:

A) total intensity = 5x10^-4W/m2

B) total intensity = 5.34x10^-4W/m2

Explanation:

Detailed explanation and calculation is shown in the image below

8 0

3 years ago

An automobile traveling 50km/hr. It decelerates at 5 meter per second square. How long will it take to stop the car? How far wil

const2013 [10]

We know, a = v/t
Here, a = 5 m/s²
v = 50 km/h= 13.88 m/s

Substitute their values into the expression:
5 = 13.88 / t
t = 13.88/5
t = 2.78 sec

Now, we know, v = d/t
13.88 = d/2.78
d = 13.88 * 2.78
d = 38.53 meter

In short, Your Answers would be:
i) It will take 2.78 sec
ii) It will travel for 38.53 m after a brakes applied.

Hope this helps!

3 0

3 years ago

A gas undergoes two processes. In the first, the volume remains constant at 0.170 m3 and the pressure increases from 1.50×105 Pa

Mnenie [13.5K]

Answer:

$W_{T} = - 24 kJ$