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3 years ago

What is the mass of an object that requires a force of 4,900 Newton's to accelerate 7 m/s/s

Physics

1 answer:

Oliga [24]3 years ago

8 0

Answer:

Explanation:

Formula

F = m * a

Givens

F = 4900

a = 7 m/s^2

Solution

4900 = m * 7 Divide by 7

4900/7 = m

700 kg = m

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The figure below shows regions of the electromagnetic

nika2105 [10]

Answer:

The electromagnetic spectrum in order of increasing frequency is - radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.

The frequency of the gamma rays is >3×10

Hence, the gamma rays has the maximum frequency in the electromagnetic spectrum.

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3 years ago

A bicycle wheel with radius 0.3 m rotates from rest to 3 rev/s in 5 s. What is the magnitude and direction of the total accelera

AlekseyPX

Answer:

Explanation:

Given

Radius of bicycle wheel $r=0.3\ m$

Initial angular velocity $\omega _0=0$

It rotates 3 revolution in 5 s therefore

$\omega =2\pi 3=\6\pi =18.85\ rad/s$

using $\omega =\omega _0+\alpha t$

where $\alpha =angular\ acceleration$

$\omega =Final\ angular\ velocity$

$t=time$

$\alpha =\frac{18.85}{5}=3.77 rad/s^2$

Total acceleration of any point will be a vector sum of tangential acceleration and centripetal acceleration

$\omega at t=1$

$\omega =0+3.77\times 1=3.77 rad/s$

$a_c=\omega ^2\cdot r$

$a_c=(3.77)^2\cdot 0.3=4.26 m/s^2$

Tangential acceleration $a_t=\alpha \times r$

$a_t=3.77\times 0.3=1.13 m/s^2$

$a_{net}=\sqrt{a_t^2+a_c^2}$

$a_{net}=\sqrt{(1.13)^2+(4.26)^2}$

$a_{net}=4.41 m/s^2$

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4 years ago

In Figure 21-4 B, does the magnetic field -due to the current carrying wire- curve in a clockwise or counter-clockwise direction

weeeeeb [17]

The magnetic field between the poles of the horseshoe magnet in fig 21.4 B curves in the <u>counter clockwise direction.</u>

The magnetic field lines due to a straight current carrying conductor is given by the right hand thumb rule. This rule is stated as follows: Imagine holding the current carrying conductor in your right hand with the thumb pointing in the direction of current, then the direction in which your fingers curve around the wire gives the direction of the magnetic field lines. The direction of the magnetic field lines at a point gives the direction of magnetic field at that point.

On applying this rule, it can be seen that the magnetic field due to the conductor shown in Fig 21.4 B curves in the counter clockwise direction.

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3 years ago

Read 2 more answers

On the whole, the United States is gradually losing its control and leadership over the affairs of the Middle East, and there is

Goshia [24]

It should be recalled that the US interfered because it opposed the Gulf War coalition of countries is the reason of middle east loose the control.

<h3>Why did U.S. fight Gulf War?</h3>

The invaded of Iraq in Kuwait to gain the more dominance in the field of oil supply. The US and the UN Security Council requested that Iraqi ruler Saddam Hussein remove Iraqi forces from Kuwait in retaliation, but Hussein refused.

Thus, it is because US interfered because it opposed the Gulf War

For more details about U.S. fight Gulf War, click here:

brainly.com/question/10213305

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2 years ago

The four-firm concentration ratio for newstands is 17 and for electric lamp makers it is 89. The HHI for newstands is 105 and f

TEA [102]

Answer:

is; is not

Explanation:

The four-firm concentration ratio for newstands is 17 and for electric lamp makers it is 89. The HHI for newstands is 105 and for electric lamp makers it is 2 comma 850. The newstand market is an example of monopolistic competition. The electric lamp market is not an example of monopolistic competition

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4 years ago