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2 years ago

PLEASE HELP WILL GET BRAINIEST, ONLY 2 QUESTIONS. WILL GET AN EXTRA 40 POINTS

1 answer:

8 0

1. They have more mass, thus more gravity.
1a.) They are more distant from the Sun, so the solar winds that have stripped the atmospheres of Mercury and Mars, for example, down to practically nothing, are not as strong.

2.) Inner planets have hard, rocky surfaces and no rings. Outer planets have rings and are gassy!

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A total positive charge of 12.00 mC is evenly distributed on a straight thin rod of length 6.00 cm.

Gala2k [10]

It’s not in English can you change it please

3 0

2 years ago

The blades in a blender rotate at a rate of 6100 rpm. When the motor is turned off during operation, the blades slow to rest in

MissTica

Answer:

155.80rad/s

Explanation:

Using the equation of motion to find the angular acceleration:

$\omega_f = \omega_i + \alpha t$

$\omega_f$ is the final angular velocity in rad/s

$\omega_i$ is the initial angular velocity in rad/s

$\alpha$ is the angular acceleration

t is the time taken

Given the following

$\omega_f = 6100rpm$

Time = 4.1secs

Convert the angular velocity to rad/s

1rpm = 0.10472rad/s

6100rpm = x

x = 6100 * 0.10472

x = 638.792rad/s

$\omega_f = 638.792rad/s\\$

Get the angular acceleration:

Recall that:

$\omega_f = \omega_i + \alpha t$

638.792 = 0 + ∝(4.1)

4.1∝ = 638.792

∝ = 638.792/4.1

∝ = 155.80rad/s

Hence the angular acceleration as the blades slow down is 155.80rad/s

5 0

2 years ago

What is a period in physics?

Citrus2011 [14]

Answer:

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle.

3 0

2 years ago

A cannon fires a cannonball of mass 16.0 kg by applying a force of 2750 N along the 1.25 m length of the barrel. (a) How much wo

Zarrin [17]

To develop this problem it is necessary to apply the concepts related to Work and energy conservation.

By definition we know that the work done by a particle is subject to the force and distance traveled. That is to say,

$W = F*d$

Where,

F= Force

d = Distance

On the other hand we know that the potential energy of a body is given based on height and weight, that is

$PE = -mgh$

The total work done would be given by the conservation and sum of these energies, that is to say

$W_{net} = W+PE$

PART A) Applying the work formula,

$W = F*d\\W = 2750*1.25\\W = 3437.5J$

PART B) Applying the height equation and considering that there is an angle in the distance of 25 degrees and the component we are interested in is the vertical, then

$PE = -mgh*sin25$

$PE = -16*9.81*1.15sin25$

$PE = -82.9J$

The net work would then be given by

$W_{net} = W+PE$

$W_{net} = 3437.5J-82.9J$

$W_{net} = 3354.6J$

Therefore the net work done by these 2 forces on the cannonball while it is in the cannon barrel is 3355J

3 0

3 years ago

Is kinetic energy scalar quantity

VashaNatasha [74]

Yes, Kinetic Energy is a scalar quantity because the direction is not needed. A scalar quantity is one dimensional measurement.

Explanation:

Kinetic Energy is a scalar quantity that means it has only a magnitude and no direction.
Energy has a size but no direction; two objects can have the same kinetic energy but they travel in opposite directions.
The formula of Kinetic Energy is

K.E = $\frac{1}{2} mv^{2}$

Mass is a scalar quantity and velocity is a vector quantity.
squaring velocity will make vector to scalar quantity.

5 0

2 years ago

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