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2 years ago

Assuming you exert a constant force on the wagon, how fast is it moving after 5 seconds?

Physics

1 answer:

Gelneren [198K]2 years ago

3 0

I would help but I’m also taking this

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Calculate the amount of work done (in joules) to raise the 0.2kg mass 0.5 m

Alex Ar [27]

Answer:

Explanation:

A=mgh=0.2*10*0.5=1 J

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2 years ago

What’s is a object that moves through the air space acted on only by gravity

Arada [10]

I believe the answer is projectile
As the object reach its maximum height after it thrown, its speed will falls into 0. But due to the gravity force, the speed of the object will start to accelerate again after it came down until it hit another medium.
Example of projectiles: a thrown baseball, a catapult shot.

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3 years ago

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Which statement demonstrates that ultraviolet (UV) rays are electromagnetic waves?

goldenfox [79]

The answer would probably be D

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2 years ago

There is a constriction in a clinical thermometer give reasons

Marianna [84]

There is a constriction made in a clinical thermometers.
As constriction stops the mercury inside the thermometer to drop back towards the bulb of thermometer.
So there is constriction used in clinical thermometers to prevent usage of alcohol or mercury into bulb

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2 years ago

At what net rate does heat radiate from a 300-m^2 black roof on a night when the roof's temperature is 33.0°C and the surroundin

Fynjy0 [20]

Answer:

24445.85 J/s

Explanation:

Area, A = 300 m^2

T = 33° C = 33 + 273 = 306 k

To = 18° C = 18 + 273 = 291 k

emissivity, e = 0.9

Use the Stefan's Boltzman law

$E = \sigma \times e \times A\times\left ( T^4 -T_{0}^{4}\right )$

Where, e be the energy radiated per unit time, σ be the Stefan's constant, e be the emissivity, T be the temperature of the body and To be the absolute temperature of surroundings.

The value of Stefan's constant, σ = 5.67 x 10^-8 W/m^2k^4

By substituting the values

$E = 5.64 \times 10^{-8}\times 0.9 \times 300 \times (306^{4}-291^{4})$

E = 24445.85 J/s

7 0

3 years ago