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3 years ago

Fossils are dated using radioactive... a. hydrogen b. helium c. carbon

Physics

2 answers:

OlgaM077 [116]3 years ago

7 0

Answer:

carbon

Explanation:

Setler79 [48]3 years ago

5 0

Answer:

fossils are dated using radioactive C. carbon

Explanation:

hope this helps!

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A force of 5 N produces an acceleration of 2 m/s2 on the object. What is the mass of the object?

hichkok12 [17]

Hello!

A force of 5 N produces an acceleration of 2 m/s2 on the object. What is the mass of the object ?

Data:

F (force) = 5 N

m (mass) = ?

a (acceleration) = 2 m/s²

Solving:

$F = m*a$

$5 = m*2$

$2\:m = 5$

$m = \dfrac{5}{2}$

$\boxed{\boxed{m = 2.5\:kg}}\end{array}}\qquad\quad\checkmark$

Answer:

2.5 kg

_______________________________

I Hope this helps, greetings ... Dexteright02! =)

7 0

3 years ago

Kendra lifts a box using a force of 80 N. She lifts the box a height of 0.5

Fynjy0 [20]

The work she on the box will be 40 J. Here the displacement due to the force is height.

Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.

Given data;

Force,F = 80 N

height, h = 0.5 m

Work,W = ? J

Here the displacement is height;

W = F × d

W = F × h

W = 80 N × 0.5 m

W = 40 Nm

W=40 J

Hence work she on the box will be 40 J.

To learn more about the work done refer to the link;

brainly.com/question/3902440

#SPJ1

6 0

2 years ago

A Chevrolet Corvette convertible can brake to a stop from a speed of 60.0 mi/h in a distance of 123 ft on a level roadway. What

Digiron [165]

Answer:

83.1946504051 m

Explanation:

u = Initial velocity = $60\ mph=\dfrac{60\times 1609.34}{3600}=26.82233\ m/s$

s = Displacement = $123\ ft=\dfrac{123}{3.281}=37.4885705578\ m$

$\theta$ = Angle = $26^{\circ}$

$v^2-u^2=2as\\\Rightarrow a=\dfrac{v^2-u^2}{2s}\\\Rightarrow a=\dfrac{0^2-26.82233^2}{2\times 37.4885705578}\\\Rightarrow a=-9.5954230306\ m/s^2$

Coefficient of friction

$\mu=-\dfrac{a}{g}\\\Rightarrow \mu=\dfrac{9.5954230306}{9.81}\\\Rightarrow \mu=0.978126710561$

$mg sin\theta - u mg cos\theta = ma\\\Rightarrow a=9.81(sin26-0.978126710561cos26)\\\Rightarrow a=-4.32382\ m/s^2$

$v^2-u^2=2as\\\Rightarrow s=\dfrac{v^2-u^2}{2a}\\\Rightarrow s=\dfrac{0^2-26.82233^2}{2\times -4.32382}\\\Rightarrow s=83.1946504051\ m$

The stopping distance is 83.1946504051 m

6 0

3 years ago

You illuminate a slit with a width of 77.7 μm with a light of wavelength 721 nm and observe the resulting diffraction pattern on

SVETLANKA909090 [29]

Answer:

The width is $Z = 0.0424 \ m$

Explanation:

From the question we are told that

The width of the slit is $d = 77.7 \mu m = 77.7 *10^{-6} \ m$

The wavelength of the light is $\lambda = 721 \ nm$

The position of the screen is $D = 2.83 \ m$

Generally angle at which the first minimum of the interference pattern the light occurs is mathematically represented as

$\theta = sin ^{-1}[\frac{m \lambda}{d} ]$

Where m which is the order of the interference is 1

substituting values

$\theta = sin ^{-1}[\frac{1 *721*10^{-9}}{ 77.7*10^{-6}} ]$

$\theta = 0.5317 ^o$

Now the width of first minimum of the interference pattern is mathematically evaluated as

$Y = D sin \theta$

substituting values

$Y = 2.283 * sin (0.5317)$

$Y = 0.02 12 \ m$

Now the width of the pattern's central maximum is mathematically evaluated as

$Z = 2 * Y$

substituting values

$Z = 2 * 0.0212$

$Z = 0.0424 \ m$

3 0

3 years ago

As a certain object falls, its position s (in meters) above ground after t seconds is given by s(t)=20-5t^2. Whats the average v

denpristay [2]

The average velocity of the object would be :

[s (1.5) - s (1)] / 0.5

= [8.75 -15] / 0.5

= 12.5 m/s

Hope this helps

3 0

3 years ago