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3 years ago

On a hot day, warm air on land rises and collides with cool air. Which of these weather conditions is most likely to follow?

Physics

2 answers:

stepan [7]3 years ago

5 0

Answer:

D. thunderstorm

Explanation:

If it is a warm day and the cool air collides with the warm air that comes from land, the most probable to happen would be a thunderstorm, since the cool air is more dense than warm air, the warm air would go up and condense water this will cause for a thunderstorm.

Sliva [168]3 years ago

3 0

I think its......C. Hurricane

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Can I get any help?

Pavel [41]

Try B, it seems correct. I’m very sorry if i’m incorrect.

7 0

3 years ago

Why is the efficiency of a machine always less than 100 percent? The work input is too small. It cannot have an IMA greater than

kozerog [31]

Answer:

Some work input is lost to friction

Explanation:

The efficiency of a machine is defined as:

$\eta = \frac{W_{out}}{W_{in}}$ (1)

where

$W_{out}$ is the work output

$W_{in}$ is the work input

Due to the law of conservation of energy, the work output can never be larger than the work input (because energy cannot be created). Moreover, in real machines part of the work input is lost due to the presence of frictions: as a result, part of the energy in input is converted into thermal energy or other forms of energy, and so the work output is smaller than the work input, and so the ratio (1) becomes less than 1, and so the efficiency is less than 100%.

3 0

3 years ago

Read 2 more answers

A car’s bumper is designed to withstand a 4.0-km/h (1.1-m/s) collision with an immovable object without damage to the body of th

poizon [28]

Answer:

The force bumper at 0.200m

F=2722.5 N

Explanation:

Using the energy theorem of work

$W=K_{f}- K_{i}$

W=ΔK

W=F*d

ΔK= $\frac{1}{2}*m*v_{f} ^{2} -\frac{1}{2}*m*v_{i} ^{2}$

$v_{i} =0$

ΔK=F*d= $\frac{1}{2}*m*v_{f} ^{2} -\frac{1}{2}*m*v_{i} ^{2}$

$F*d=\frac{1}{2}*m*0 ^{2}- \frac{1}{2}*m*v_{i} ^{2}\\F*d=-\frac{1}{2}*m*v_{i} ^{2}=\frac{1}{2}*900kg*(1.1\frac{m}{s})^{2}\\F*d=544.5\frac{kg*m}{s^{2}}\\ F=\frac{544.5\frac{kg*m}{s^{2}}}{0.2m} \\F=2722.5 N$

3 0

3 years ago

Marissaâs car accelerates uniformly at a rate of +2.60 m/sÂ². How long does it take for Marissaâs car to accelerate from a speed

DIA [1.3K]

Answer:

The time taken by the car to accelerate from a speed of 24.6 m/s to a speed of 26.8 m/s is 0.84 seconds.

Explanation:

Given that,

Acceleration of the car, $a=+2.6\ m/s^2$

Initial speed of the car, u = 24.6 m/s

Final speed of the car, v = 26.8 m/s

We need to find the time taken by the car to accelerate from a speed of 24.6 m/s to a speed of 26.8 m/s. The acceleration of an object is given by :

$t=\dfrac{v-u}{a}$

$t=\dfrac{(26.8-24.6)\ m/s}{2.6\ s}$

t = 0.84 seconds

So, the time taken by the car to accelerate from a speed of 24.6 m/s to a speed of 26.8 m/s is 0.84 seconds. Hence, this is the required solution.

4 0

4 years ago

What kind of light source is an IMAX movie screen

kirill115 [55]

Answer:

laser light source

Explanation:

A laser light source provides substantially more brightness than a xenon bulb, and allows IMAX to power its largest screens with even sharper and more lifelike images.

4 0

3 years ago