Electrically charged flares that arch up from the Sun are known as _______.

Answers

Answer 1

Answer: Electrically charged flares that arch up from the Sun are known as the solar flare or solar prominence. The Solar flare is the sudden brightness of the Sun near its surface. It is mostly accompanied by coronal mass ejection.

Answer 2

Answer:

Answer:

prominences

Explanation:

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A strand of 10 lights is plugged into an outlet. How can you determine if the lights are connected in series or parallel?A) Unscrew one light. If the other lights stay on, it's a series circuit. B) Unplug the strand. If the first light stays on, it's a series circuit. C) Unscrew one light. If the other lights turn off, it's a series circuit. D) Cut the strand in half. If the plugged in half stays on, it's a series circuit.

A car of mass m accelerates from speed v_1 to speed v_2 while going up a slope that makes an angle theta with the horizontal. The coefficient of static friction is mu_s, and the acceleration due to gravity is g. Find the total work W done on the car by the external forces.

Answers

Answer:

Work done by external force is given as

$Work_(external) = mgLsin\theta + \mu mgLcos(\theta) + (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

Explanation:

As per work energy Theorem we can say that work done by all force on the car is equal to change in kinetic energy of the car

so we will have

$Work_(external) + Work_(gravity) + Work_(friction) = (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

now we have

$W_(gravity) = -mg(Lsin\theta)$

$W_(friction) = -\mu mgcos(\theta) L$

so from above equation

$Work_(external) - mgLsin\theta - \mu mgLcos(\theta) = (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

so from above equation work done by external force is given as

$Work_(external) = mgLsin\theta + \mu mgLcos(\theta) + (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

What type of energy is released when fossil fuels are burned?

Answers

Before the fuel is burned, it's chock full of chemical energy. When the fuel is burned, the chemical energy is released, and it escapes in the form of heat and light energy.

Answer:

¨chemical energy¨ is released.

You push against a steamer trunk with a force of 750 N at an angle of 25° with the horizontal . The trunk is on a flat floor and the coefficient of static friction between the trunk and floor is 0.77. What is the most massive trunk you will be able to move?

Answers

This means that the horizontal force is 750sin(25°). To be able to move the truck, force applied must be greater than static friction, which equals to its coefficient (0.77) x normal contact force (= weight)

Hence, 750sin(25°) = 0.77mg. m = 750sin(25°)/(0.77g)

What is the speed of a swimmer if she covers 100m in 60 seconds?

Answers

To calculate the speed of a swimmer, you can use the formula:

Speed = Distance / Time

In this case, the distance covered is 100 meters, and the time taken is 60 seconds.

Speed = 100 meters / 60 seconds = 1.67 meters per second

So, the speed of the swimmer is approximately 1.67 meters per second.

What units are used to measure mass and weight?