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4 years ago

Give reasons:

Physics

1 answer:

Nata [24]4 years ago

6 0

Explanation:

1) 1 : to Prevent a burning we use tongs

2:it can burn our skin hoa it's help

2) 1: because pulley helps in water draw from a well

3) 1: second class lever has mechanical advantage more than one as load is in between fulcrum an effort making the effort arm longer than the load arm

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B. 24 ohms. D. Touch/hold feature

D. From negative to positive =negative charges

B. 24 ohms.

in parallel, combined resistance is less than the lowest resistance

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4 years ago

An airplane flies at 400 km/h in a 100km/h hurricane crosswind. Find the resultant speed of the plane.

kow [346]

I think the airplan flies in same speed 400

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4 years ago

What is the formula to calculate the GPE of an object?

Bas_tet [7]

Answer:

mass x gravity x height

Explanation:

Gravitational potential energy is measured in jules

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3 years ago

Read 2 more answers

81. a baseball is hit straight up and is caught by the catcher 2.0 s later, at the same height at which it left the bat. the max

andrew-mc [135]

The maximum height of the ball during this interval is 4.9 m (Option A)

<h3>How to determine the time to reach maximum height</h3>

The time taken to reach the maximum height can be obtained as follow:

Time for the entire trip (T) = 2 s
Time to reach maximum height (t) = ?

T = 2t

2 = 2t

Divide both side by 2

t = 2 / 2

t = 1 s

<h3>How to determine the maximum height reached by the ball</h3>

The maximum height reached by the ball can be obtained as follow:

Acceleration due to gravity (g) = 9.8 m/s²
Time to reach maximum height (t) =?
Maximum height (h) =?

h = ½gt²

h = ½ × 9.8 × 1²

h = ½ × 9.8 × 1

h = 4.9 m

Thus, the maximum height reached by the ball is 4.9 m (Option A)

Learn more about motion under gravity:

brainly.com/question/22719691

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7 0

1 year ago

how large can the kinetic energy of an electron be that is localized within a distance (change in) x = .1 nmapproximately the di

elena-14-01-66 [18.8K]

Answer:

The kinetic energy of an electron is $1.54\times10^{-15}\ J$

Explanation:

Given that,

Distance = 0.1 nm

We need to calculate the momentum

Using uncertainty principle

$\Delta x\Delta p\geq\dfrac{h}{4\pi}$

$\Delta p\geq\dfrac{h}{\Delta x\times 4\pi}$

Where, $\Delta p$ = change in momentum

$\Delta x$ = change in position

Put the value into the formula

$\Delta p=\dfrac{6.6\times10^{-34}}{4\pi\times10^{-10}}$

$\Delta p=5.3\times10^{-23}$

We need to calculate the kinetic energy for an electron

$K.E=\dfrac{p^2}{2m}$

Where, P = momentum

m = mass of electron

Put the value into the formula

$K.E=\dfrac{(5.3\times10^{-23})^2}{2\times9.1\times10^{-31}}$

$K.E=1.54\times10^{-15}\ J$

Hence, The kinetic energy of an electron is $1.54\times10^{-15}\ J$

4 0

3 years ago