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3 years ago

The slope of the line tangent to the curve on a position-time graph at a specific time is the

Physics

1 answer:

Rudik [331]3 years ago

7 0

Answer:

I do I make a brinliest can you please can me

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A graph of gas pressure versus the number of particles in a container is straight line.which other relationship will have a simi

natali 33 [55]

The answer here could be pressure vs. temperature.

Think of PV=nRT. T is related to P the same way as n is (assuming all other variables are kept constant).

8 0

3 years ago

A 22kg box slides down a 30.0 degree incline. If there is no friction, what is the acceleration of the box?

Rashid [163]

Answer:

Acceleration of the box is 4.9 m/s².

Explanation:

The free body diagram is shown below.

The weight of the body can be resolved into two mutually perpendicular components as shown. The force responsible for sliding motion of the box along the incline is due to $mg\sin \theta$ acting along the incline.

Therefore, as per Newton's second law of motion,

Net force = $mass\times acceleration$

Now, net force acting along the incline is only $mg\sin \theta$

Therefore,

$mg\sin \theta=ma\\a=g\sin \theta$

Now, $g=9.8\textrm{ and } \theta = 30$

Therefore, the acceleration of the box is given as:

$a=9.8\times \sin(30)=9.8\times 0.5=4.9\textrm{ }m/s^{2}$

Acceleration of the box is 4.9 m/s².

6 0

4 years ago

Based on our study of electromagnets, what would be the best thing to do to a generator in order to produce more electricity?

Keith_Richards [23]

Answer:

Explanation:

just took a test on ed sorry if wrong I got it right

4 0

3 years ago

Read 2 more answers

Please choose the answer that describes the scientific notation for 3,134,000,000.

const2013 [10]

Well, the answer is obviously D, because it's the only one that starts with 3.134.

Moving the decimal place 9 times to the right will give us:

3,134,000,000

$\Huge\checkmark$

5 0

4 years ago

Read 2 more answers

A hot-water stream at 80 ℃ enters a mixing chamber with a mass flow rate of 0.5 kg/s where it is mixed with a stream of cold wat

rewona [7]

Answer:

$\dot{m_{2}}=0.865 kg/s$

Explanation:

$\dot{m_1}= 0.5kg/s$

from steam tables , at 250 kPa, and at

T₁ = 80⁰C ⇒ h₁ = 335.02 kJ/kg

T₂ = 20⁰C⇒ h₂ = 83.915 kJ/kg

T₃ = 42⁰C ⇒ h₃ = 175.90 kJ/kg

we know

$\dot{m_{in}}=\dot{m_{out}}$

$\dot{m_{1}}+\dot{m_{2}}=\dot{m_{3}}$

according to energy balance equation

$\dot{m_{in}}h_{in}=\dot{m_{out}}h_{out}$

$\dot{m_{1}}h_{1}+\dot{m_{2}}h_{2}=\dot{m_{3}}h_{3}$

$\dot{m_{1}}h_{1}+\dot{m_{2}}h_{2}=(\dot{m_{1}}+\dot{m_{2}})h_{3}\\(0.5\times 335.02)+(\dot{m_{2}}\times 83.915)=(0.5+\dot{m_{2}})175.90\\\dot{m_{2}}=0.865 kg/s$

4 0

4 years ago