How effective would a thermonuclear device of 47 megatons or higher like the zsar bomba be in space?

Could we use as planetary defence on somthing like an asteroid as long as it is detected in time and what effect if any would it have on our planet and our satellites in orbit?

A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 91.3 m/s2 for 1.79 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) will the rocket reach?

A device connected in a parallel circuit will undergo a higher voltage drop compared to the same device connected in a series circuit. is this true or false, and also why does this occur?

In two paragraphs, compare and contrast the atmospheres of the inner planets. Explain the important conditions leading to the differences of these atmospheres.

Keep in brief and short. Thank you.

A charge of -2.75 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.092 m. The charges on the circle are -4.3 µC at the position due north and +5.25 µC at the position due east. What are the magnitude and direction of the net electrostatic force acting on the charge at the center? Specify the direction relative to due east.

Assume you have a somewhat idealized J-band system with spectral response of 0.8 from 1.15 through 1.35 mm and zero outside this range.

What is the effective (mean) wavelength?

Select the situations from the list below in which mechanical energy is conserved.

A ball sliding down a hill with friction.

The Moon orbiting the Earth.

A ball sliding down a frictionless hill.

A child swinging on a frictionless swing, ignoring air resistance.

A ball that is dropped from a certain height and bounces back to a lower height.

An ice skater gliding along the ice.

Someone else posted this but the answer isn't correct.

You are an astronaut in the space shuttle pursuing a satellite in need of repair. You are in a circular orbit of the same radius as the satellite (420 km above the Earth), but 24 km behind it.

(a) How long will it take to overtake the satellite if you reduce your orbital radius by 1.0 km?

___________ hr

(b) By how much must you reduce your orbital radius to catch up in 7.0 hours?
___________ m

a property company who will also operate the building is deciding whether to build a standard efficiency office building or a high efficiency office building. The office building is 8,000 m2 and its energy is supplied 100% by electricity. The standard efficiency office tower will consume approximately 140 kWh / m2 /y. The high efficiency office tower will consume approximately 100 kWh / m2 /y. The incremental cost (i.e. the cost between the standard efficiency and high efficiency office tower) is $40 per m2 and the building systems are expected to last 25 years. 8a. What is the estimated annual energy cost savings per year for the high efficiency building compared to the standard efficiency building? o 8b. Does it make sense for the property company to invest in the high efficiency office building?

1) Picture a Styrofoam packing peanut in your hand. If you close your hand around it and squeeze, what are you doing to the pressure?

2) How does this affect the volume of the packing peanut?

3)By this example, what is the relationship between the pressure on an object and the volume of the object (direct relationship, inverse relationship, etc.)? Explain how you come to this conclusion.

4) Now let

Unit 2 Accelerations ...
Compute the answers and match the following.

What are forces felt by an ion in an electric field, an electron in a wire carrying current, and a magnet (and its component parts) in a magnetic field and why are these forces important.

A cylindrical glass beaker of height 1.272 m rests on a table. The bottom half of the beaker is filled with a gas, and the top half is filled with liquid mercury that is exposed to the atmosphere. The gas and mercury do not mix because they are separated by a frictionless, movable piston of negligible mass and thickness. The initial temperature is 276 K. The temperature is increased until a value is reached when one-half of the mercury has spilled out. Ignore the thermal expansion of the glass and mercury, and find this temperature in kelvins.

For those fortunate souls who do not need glasses, the lens of the eye adjusts its focal length in order to form a proper image on the retina. This typically means that very distant objects as well as objects as close as 25 cm can be seen clearly. Many of us need corrective lenses since the lens in our eye cannot adjust sufficiently to produce a clear image over the full range object distances. This may be because the lens itself does not adjust well or because the eye is either longer or shorter than ‘normal’. In the case of someone who is nearsighted (can see up close) the eye may only be able to see clearly items up to 50cm or 1m away (this would be the far point). In order to see something further away, a lens (either glasses or contacts) is used to produce a virtual image of a distant object at the person’s far point. Their eye can then accommodate the rest of the way and produce a clear image. Suppose a person who has a far point of 63.0 cm is trying to view a distant object. What is the focal length (with correct sign) of a lens that would take a distant object and make an image on the same side of the lens as the object a distance 63.0 cm from the lens? Incorrect.

Is the lens converging or diverging?

Lenses are prescribed in terms of their refractive power, which is expressed in terms of diopters (see the text or your favorite search engine for the definition of a diopter). What is the refractive power of this lens in terms of diopters? (do not enter units.)

In the case of someone who is farsighted, the eye is not able to focus clearly on objects closer than a certain distance. This closest point on which a person’s eye can focus is called the near point. In this situation the corrective lens is used to make an object closer than the near point produce an image further away from the lens at the near point. Suppose a person who has a near point of 53.1 cm is trying to view a book at a distance of 25.0 cm. What is the focal length (with correct sign) of a lens that would take the book and make an image on the same side of the lens as the book a distance 53.1 cm from the lens?

Is the lens converging or diverging?

What is the refractive power of this lens in terms of diopters? (do not enter units.)