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3 years ago

When is an object moving in uniform circular motion?

Physics

2 answers:

zalisa [80]3 years ago

7 0

When its tangential speed is constant

ad-work [718]3 years ago

6 0

When its tangential speed is constant
Although the speed of an object that has a uniform circular motion is constant, its velocity is not constant. Not only that, but it is actually changing constantly.

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What could be used as another word for electrical potential

tekilochka [14]

Answer:

hey mate

answer is probably voltage as per me

Explanation:

Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points, which is defined as the work needed per unit of charge to move a test charge between the two points

5 0

2 years ago

Read 2 more answers

Your friend is wearing a red coat. When white light hits the coat, some light is reflected, and some is absorbed.

Vilka [71]

Answer:

Orange , yellow, green and blue

red coat absorbs all colors of visible light except red, so red light

is the only light left to bounce off of the coat toward our eyes.

4 0

2 years ago

A thermally isolated system is made up of a hot piece of aluminum and a cold piece of copper; the aluminum and the copper are in

butalik [34]

Answer:

copper will have more change in temperature as compare with aluminum

Explanation:

Hot piece of copper is made in contact with cold piece of aluminium

So here thermal energy transfer will take place from copper to aluminium

so by energy conservation we can say that heat given by copper is same as the heat absorbed by aluminium.

now we have

$m_1s_1\Delta T_1 = m_2s_2\Delta T_2$

here we know that

$s_1$ = specific heat capacity of copper

$s_2$ = specific heat capacity of aluminum

given that specific heat capacity of aluminium is more than double that of copper

so we can say

$s_2 = 2s_1$

so here if the mass of copper and aluminium is same then

$\Delta T_1 = 2 \Delta T_2$

so temperature change of copper is twice the temperature change of aluminium

So copper will have more change in temperature as compare with aluminum

4 0

3 years ago

Do atoms have full outer energy level combine with other atoms

Pavlova-9 [17]

All of the Noble Gases, which are on the right side of the periodic table, have a full outer energy level. The elements that are Noble Gases are the following: Neon Argon Krypton Xenon Radon Ununoctium.

Hope this helps.

8 0

3 years ago

A projectile rolls off a cliff with a velocity of 40 m/s. The cliff is 60 meters high.

masya89 [10]

Answer:

1) t = 3.45 s, 2) x = 138 m, 3) v_{y} = -33.81 m /s, 4) v = 52.37 m / s ,

5) θ = -40.2º

Explanation:

This is a projectile exercise, as they indicate that the projectile rolls down the cliff, it goes with a horizontal speed when leaving the cliff, therefore the speed is v₀ₓ = 40 m / s.

1) Let's calculate the time that Taardaen reaches the bottom, we place the reference system at the bottom of the cliff

y = y₀ + $v_{oy}$ t - ½ g t²

When leaving the cliff the speed is horizontal v_{oy}= 0 and at the bottom of the cliff y = 0

0 = y₀ - ½ g t2

t = √ 2y₀ / g

t = √ (2 60 / 9.8)

t = 3.45 s

2) The horizontal distance traveled

x = v₀ₓ t

x = 40 3.45

x = 138 m

3) The vertical velocity at the point of impact

v_{y} = I go - g t

v_{y} = 0 - 9.8 3.45

v_{y} = -33.81 m /s

the negative sign indicates that the speed is down

4) the resulting velocity at this point

v = √ (vₓ² + v_{y}²)

v = √ (40² + 33.8²)

v = 52.37 m / s

5) angle of impact

tan θ = v_{y} / vx

θ = tan⁻¹ v_{y} / vx

θ = tan⁻¹ (-33.81 / 40)

θ = -40.2º

6) sin (-40.2) = -0.6455

7) tan (-40.2) = -0.845

8) when the projectile falls down the cliff, the horizontal speed remains constant and the vertical speed increases, therefore the resulting speed has a direction given by the angle that is measured clockwise from the x axis

6 0

3 years ago