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3 years ago

A man jumps off a building that is 40 stories tall and 160 meters high

Physics

1 answer:

Free_Kalibri [48]3 years ago

5 0

Unfortunately he dies.

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Which of the following items has the most inertia while at rest?

netineya [11]

Answer:

airplane

Explanation:

as greater mass greater inertia

8 0

2 years ago

Essam is abseiling down a steep cliff. How much gravitational potential energy does he lose for every metre he descends? His mas

Dafna11 [192]

Answer:

720 J

Explanation:

The gravitational potential energy that Essam loses for every metre is given by:

$\Delta U=mg \Delta h$

where

m=72 kg is Essam's mass

$g=10 N/kg$ is the gravitational field strength

$\Delta h=1 m$ is the difference in height

By substituting the numbers into the formula, we find

$\Delta U=(72 kg)(10 N/kg)(1 m)=720 J$

5 0

3 years ago

Read 2 more answers

A 9.0-V battery (with nonzero resistance) and switch are connected in series across the primary coil of a transformer. The secon

qwelly [4]

Answer:

N₂ / N₁ = 13.3

Explanation:

A transformer is a system that induces a voltage in the secondary due to the variation of voltage in the primary, the ratio of voltages is determined by the expression

ΔV₂ = N₂ /N₁ ΔV₁

where ΔV₂ and ΔV₁ are the voltage in the secondary and primary respectively and N is the number of windings on each side.

In this case, they indicate that the primary voltage is 9.0 V and the secondary voltage is 120 V

therefore we calculate the winding ratio

ΔV₂ /ΔV₁ = N₂ / N₁

N₂ / N₁ = 120/9

N₂ / N₁ = 13.3

s good clarify that in transformers the voltage must be alternating (AC)

3 0

3 years ago

The liver’s role is to:

Lelu [443]

D. The liver's role is to remove harmful substances from the blood.

7 0

3 years ago

Two sources of light of wavelength 720 nm are 10 m away from a pinhole of diameter 1.2 mm. How far apart must the sources be for

julia-pushkina [17]

Answer:

The value is $y = 0.00732 \ m$

Explanation:

From the question we are told that

The wavelength of each source is $\lambda = 720 \ nm = 720 *10^{-9} \ m$

The distance from the pinhole $D = 10 \ m$

The diameter is $d = 1.2 mm = \frac{1.2}{1000} = 0.0012 \ m$

Generally from Rayleigh's criterion we have that the distance between the sources of light for their diffraction patterns is mathematically represented as '

$y = \frac{ 1.22 * \lambda * D}{d}$

=> $y = \frac{ 1.22 * 720 *10^{-9}* 10 }{ 0.0012}$

=> $y = 0.00732 \ m$

6 0

3 years ago