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3 years ago

True or false Cool air is less dense than warm air.

Physics

1 answer:

harina [27]3 years ago

3 0

False
Cool air is denser than Warm Air

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A building that is 105.50 ft. feet tall is casting a shadow that is 37.50 ft. feet. If the building next to it, is casting a sha

Arlecino [84]

115.35 ft

Set the proportion up 37.50/105.50 = 41/x and solve for x

7 0

3 years ago

Una mujer de 65 kg, se balancea sobre uno de los tacones de sus zapatos. Si el tacón es circular con un radio de 0,5 cm, ¿qué pr

goldenfox [79]

Explicacion

m = 65 kg

g = 10 m/s²

r = 0.5 cm (1m / 100 cm) = 0.05 m

A = π r² = π (0.05 m)² = 0.00785 m²

F =W = m g = 65 kg(10 m/s²) = 650 N

P = F/A = 650 N / 0.00785 m² = 82802.54 N/m²

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3 years ago

What is in between the nucleus and the electrons in an atom?

hoa [83]

Answer:

D. Empty Space

Explanation:

4 0

3 years ago

Assume that a uniform magnetic field is directed into thispage. If an electron is released with an initial velocity directedfrom

Feliz [49]

Answer:

B). to the right

Explanation:

Since the direction of magnetic field is into the page

So here we know that

$B = B_o(-\hat k)$

now the velocity is from bottom to top

so we have

$v = v_o \hat j$

now the force on the moving charge is given as

$\vec F = q(\vec v \times \vec B)$

now we have

$\vec F = (-e)(v_o \hat j \times B_o(-\hat k))$

$\vec F = e v_o B \hat i$

so force will be towards Right

7 0

3 years ago

Question 10 of 34

labwork [276]

Julia walks from the park, which is six blocks east of her house, to the store, which is three blocks east of her house. Julia walks for 5 minutes. This walk's average speed will be 1.2 blocks per minute. Option B is correct.

<h3>What is displacement?</h3>

Displacement is defined as the shortest distance between the two points. Distance is the horizontal length covered by the body. While displacement is the shortest distance between the two points.

Displacement is a vector quantity .its unit is m.

The average velocity on this walk will be;

$\rm v_{avg}= \frac{d}{t} \\\\ \rm v_{avg}= \frac{6 \ block+ 3 \ block }{5 \ minute } \\\\ v_{avg}=1.4 \ block /min$

Hence option B is correct.

To learn more about displacement refer to the link; brainly.com/question/10919017

#SPJ1

3 0

2 years ago