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3 years ago

Helpp for number 6 please

Physics

1 answer:

Vanyuwa [196]3 years ago

7 0

A neutral object contains no net charge, but still has many charged particles within the object, it just means that the charges cancel each other out.

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Now explore friction force. Set the piece of plastic or wood on the table and push it steadily across the tabletop using your fi

photoshop1234 [79]

Answer: Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact

5 0

3 years ago

A 5 inch tall balloon shoot doubles in height every 3 days. if the equation y=ab^x, where is x is the number of doubling periods

VashaNatasha [74]

In this item if we let x be the number of doubling period, that is number of days divided by 3, and y be the height of the bamboo shoot, in the equation
y = ab^x
The value of a is 5 because that is the original height of the shoot and b is 2 because we are talking about the doubling rate. The equation is therefore,
y = 5(2^x)

3 0

3 years ago

How might a weather scientist feel about the market for helium filled balloons

elena55 [62]

helium is rare and inert and allows balloons to rise. he wants it vheaply ...market may make it expensive.

He also used in low temperature cryogenics

5 0

3 years ago

Two sinusoidal waves with identical wavelengths and amplitudes travel in opposite directions along a string with a speed of 10 c

andrey2020 [161]

Answer:

The wave length of the string = 10 cm or 0.1 m

Explanation:

Wave: A wave can be defined as a disturbance, which travels through a medium and transfer energy from one point to another, without causing any permanent displacement of the medium itself.

The velocity, frequency and wavelength of a wave is related as shown,

v = λf ........................ Equation 1

Where v = velocity of the wave, λ = wave length, f = frequency.

λ = v/f ..................... Equation 2.

Given: v = 10 cm/s,

T = 2t, where t = 0.5 s, (This is half of one cycle)

T = 2×0.5 = 1 s,

But T = 1/f = 1/1 = 1 Hz.

Substituting these values into equation 2

λ = 10(1)

λ = 10 cm. or 0.1 m

Thus the wave length of the waves = 10 cm or 0.1 m

5 0

4 years ago

Three balls are kicked from the ground level at some angles above horizontal with different initial speeds. All three balls reac

aliya0001 [1]

Answer:

The time of the flight will be the same for the three balls.

Explanation:

This is very interesting problem. The key to solve it is to understand that we don't care about the horizontal movement of the balls. Let's see why using kinematics:

We know, that, in 1D, for constant acceleration, the position y at time t is given by

$y(t) = \ y_0 \ + \ v_0 \ t \ + \frac{1}{2} \ a \ t^2$

where $y_0$ is the initial position, $v_0$ the initial speed, and a the acceleration.

And the equation for the speed is:

$v(t) = v_0 + a t$

Now, lets say that the position is the height measured from the ground, then, in our problem, $y_0$ must be zero, $v_0$ is the y component of the velocity $v_{y_0}$ and a is the gravitational acceleration of the Earth, that points in the negative y direction: