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disa [49]
2 years ago
7

A room has a heater on one side and

Physics
1 answer:
Serjik [45]2 years ago
5 0

Answer:

the warm air would be up and cool would be down

Explanation:

warm air is less dense and cool air is more dense

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put the car on fire

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if you put it on fire you would have a lot of light now

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How does the kinetic energy of an object relate to its mass and velocity?
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The kinetic energy of an object is directly proportional to its mass, and to the square of its velocity.

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The first step when doing<br> an<br> investigation is the observe a situation. True or false?
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A train pulls away from a station with a constant acceleration of 0.42 m/s2. A passenger arrives at a point next to the track 6.
Rina8888 [55]

Answer:

2.69 m/s

Explanation:

Hi!

First lets find the position of the train as a function of time as seen by the passenger when he arrives to the train station. For this state, the train is at a position x0 given by:

x0 = (1/2)(0.42m/s^2)*(6.4s)^2 = 8.6016 m

So, the position as a function of time is:

xT(t)=(1/2)(0.42m/s^2)t^2 + x0 = (1/2)(0.42m/s^2)t^2 + 8.6016 m

Now, if the passanger is moving at a constant velocity of V, his position as a fucntion of time is given by:

xP(t)=V*t

In order for the passenger to catch the train

xP(t)=xT(t)

(1/2)(0.42m/s^2)t^2 + 8.6016 m = V*t

To solve this equation for t we make use of the quadratic formula, which has real solutions whenever its determinat is grater than zero:

0≤ b^2-4*a*c = V^2 - 4 * ((1/2)(0.42m/s^2)) * 8.6016 m =V^2 - 7.22534(m/s)^2

This equation give us the minimum velocity the passenger must have in order to catch the train:

V^2 - 7.22534(m/s)^2 = 0

V^2 = 7.22534(m/s)^2

V = 2.6879 m/s

4 0
3 years ago
What is the magnitude of the force of gravity acting on a box that has a mass of 100 kilograms and is at sea level
jonny [76]
The answer would be 981 newtons or 220.46 pounds.
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3 years ago
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