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3 years ago

Question 6

Physics

1 answer:

Effectus [21]3 years ago

3 0

Answer:

4.9 x 10-23 N

Explanation:

I took the test

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Which of the following changes would remove the source of energy that generates the convection which makes wind here on Earth?

alukav5142 [94]

Answer:blocking all solar radiation

Explanation:

google has it

4 0

3 years ago

How much does a 20 kg rock weigh on Earth where g = 9.8 m/s2?

pentagon [3]

Answer:

$\huge\boxed{196\:N}$

Explanation:

Mass and weight ain't the same thing. So, for calculating weight we would use Newton's 2nd Law of Motion i.e. Force = Mass × Acceleration.

According to question,

The mass is 20kg

Acceleration is 9.8 m/s^2

Putting the given values into the formula,

F = 20 × 9.8

F = 196N

So, the weight of the rock is 196 N

Hope it helps!<3

3 0

2 years ago

Ask Your Teacher A coil is formed by winding 260 turns of insulated 16 gauge copper wire (diameter = 1.3 mm) in a single layer o

Liula [17]

Answer:

The resistance is $2.98$ Ω

Explanation:

<u>Data</u>

diameter: $d=1.3mm$ , $d=1.3*10^{-3} m$

Radius: $r=\frac{d}{2} ,r=\frac{1.3*10^{-3} }{2} ,r=6.5*10^{-4} m$

Resistivity constant: $p=1.65*10^{-8}$ Ω $m$

To find Area:

$A=\pi r^{2} \\A=\frac{22}{7} *(6.5*10^{-4} )\\A=1.33*10^{-6} m^{2}$

To find circumference:

$l=260*(2\pi (0.15))\\l=245.04m$

Now we can apply the Resistivity formula:

$R=p\frac{l}{A}$

$R=(1.65*10^{-8} )$ Ω $m*\frac{240.04m}{1.33*10^{-6}m^{2} }$

$R=2.98$ Ω

4 0

3 years ago

Which part is not necessary to complete a circuit

Levart [38]

A SWITCH I THINK??..

6 0

3 years ago

Read 2 more answers

You can use any coordinate system you like in order to solve a projectile motion problem. To demonstrate the truth of this state

Aleks04 [339]

Explanation:

It is given that,

Height of the building, h = 44 m

Initial horizontal velocity, $u_x=ucos\theta=8.6\ m/s$

Initial vertical velocity, $u_y=usin\theta=10.5\ m/s$

It can be assumed to find the maximum height of the projectile and time taken to reach the maximum height.

The formula for the maximum height is given by :

$H=\dfrac{(u\ sin\theta)^2}{2g}$

g is the acceleration due to gravity

$H=\dfrac{(10.5)^2}{2\times 9.8}=5.625\ m$

The total maximum height, h' = h + H

$h'=44+5.625=49.625\ m$

The formula for the time of flight is given by :

$t_{max}=\dfrac{u\ sin\theta}{g}$

$t_{max}=\dfrac{10.5}{9.8}=1.07\ s$

Hence, this is the required solution.

3 0

3 years ago