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3 years ago

Someone pls help! My physics quiz is today:(

Physics

2 answers:

lisabon 2012 [21]3 years ago

8 0

Answer:

it should be -2m/s

Explanation:

Because it is going down from minutes 6-8. And down in most cases means negative. And since it is going down 2 it should be -2m/s.

Hope this helped!!

Vladimir [108]3 years ago

3 0

Answer:

0m/s^2

Explanation:

This is a position vs time graph, so the slop of the line represents the velocity (if you do not understand why that is then feel free to ask). Since the slope is constant (a straight line), we know that the velocity is not changing, in other words, the object is not accelerating.

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A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open to the air at the top. Fr

astraxan [27]

Answer:

x = 0.0734 m = 7.34 cm

Explanation:

First we shall calculate the area of the piston:

$Area = \pi radius^2\\Area = \pi (0.028\ m)^2\\Area = 0.00246\ m^2$

Now, we will calculate the force on the piston due to atmospheric pressure:

$Atmospheric\ Pressure = \frac{Force}{Area}\\\\Force = (Atmospheric\ Pressure)(Area)\\Force = (101325\ N/m^2)(0.00246\ m^2) \\Force = F = 249.56\ N$

Now, for the compression of the spring we will use Hooke's Law as follows:

$F = kx\\$

where,

k = spring constant = 3400 N/m

x = compression = ?

Therefore,

x = 0.0734 m = 7.34 cm

8 0

3 years ago

Arcsin 0.9331 in degrees

lisabon 2012 [21]

Answer:

68.9233231661

Explanation:

Just put it into your calculator, shift sin should do it but it will come up like this: $sin^{-1}$ which is the same as arcsin

6 0

3 years ago

Do you know any good books about physics and math?

horrorfan [7]

What Is Mathematics? Is a book about math

A book about physics /A Brief History of Time

5 0

3 years ago

A water tower is a familiar sight in many towns. The purpose of such a tower is to provide storage capacity and to provide suffi

Mademuasel [1]

The image of the water tower and the houses is in the attachment.

Answer: (a) P = 245kPa;

(b) P = 173.5 kPa

Explanation: Gauge pressure is the pressure relative to the atmospheric pressure and it is only dependent of the height of the liquid in the container.

The pressure is calculated as: P = hρg

where

ρ is the density of the liquid, in this case, water, which is ρ = 1000kg/m³;

When it is full the reservoir contains 5.25×10⁵ kg. So, knowing the density, you know the volume:

ρ = $\frac{m}{V}$