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3 years ago

11

If something is frictionless does it have thermal energy

1 answer:

PIT_PIT [208]3 years ago

7 0

Answer:

No

Explanation:

because there is no pressure

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You can increase friction by

tia_tia [17]

A. making the surface rougher

7 0

4 years ago

What is the formula for Impedance for circuit with R, C, and L?

NikAS [45]

Answer:

The formula for Impedance for circuit with R, C, and L are:

$z=\sqrt{R^{2}+\left ( \omega L-\frac{1}{\omega C} \right )^2}$

The impedance Z of the series RLC circuit depend upon angular frequency ω. Impedance is measured in ohms and resistance (R), inductance reactance and capacitive reactance. Series RLC circuit consist of the resistance, a capacitance and an inductance connected in the circuits. Electrical impedance is the measurement of the opposition that a circuit present in a current.

3 0

3 years ago

A kite is hovering over the ground at the end of a straight 38-m line. the tension in the line has a magnitude of 17 n. wind blo

postnew [5]

Let the tension in the thread will be at angle theta

now by force balance in x and y directions we can say

$17 cos\theta = 18 cos60$

$17 cos\theta = 9$

$\theta = 58.03 degree$

now for the height of the kite we can use

$h = L sin\theta$

$h = 38 sin58.03$

$h = 32.23 m$

<em>so it will be at height 32.23 m from ground</em>

3 0

4 years ago

A ball is thrown vertically upward (assumed to be the positive direction) with a speed of 24.0 m/s from a height of 3.0 m. (a) H

SashulF [63]

Answer:

a) 29.36 m

b) 2.44 s

c) 2.57 s

d) 25.117 m/s

Explanation:

t = Time taken

u = Initial velocity = 24 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

b)

$v=u+at\\\Rightarrow 0=24-9.81\times t\\\Rightarrow \frac{-24}{-9.81}=t\\\Rightarrow t=2.44 \s$

Time taken by the ball to reach the highest point is 2.44 seconds

a)

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=24\times 2.44+\frac{1}{2}\times -9.81\times 2.44^2\\\Rightarrow s=29.35\ m$

The highest point reached by the ball above its release point is 29.36 m

c) Total height is 3+29.35 = 32.35 m

$s=ut+\frac{1}{2}at^2\\\Rightarrow 32.35=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{32.35\times 2}{9.81}}\\\Rightarrow t=2.57\ s$

The ball reaches the ground 2.57 seconds after reaching the highest point

d)

$v=u+at\\\Rightarrow v=0+9.81\times 2.57\\\Rightarrow v=25.2117\ m/s$

The ball will hit the ground at 25.2117 m/s

8 0

3 years ago

A person runs with a constant velocity of 1.2 m/s for 30 seconds. how far do they travel?

Nataliya [291]

They will travel 36 m

8 0

3 years ago