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Physics

Landin Fuentes

The net force on a 3.2kg toy airplane is 7N. What is the accelerator of the airplane?

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Physics

Stella Carson

A person, with a mass of 50.0 kg, stands on a weighing scale in a lift which is moving

upwards with a uniform acceleration of 5.0 m/s

2

. What would be the reading on the

scale?

(A) 490 N (B) 250 N (C) 740 N (D) 240 N

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Physics

Laney Elliott

A student analyzes data of the motion of a planet as it orbits a star that is in deep space. The orbit of the planet is considered to be stable and does not change over time. What can the student say about this initial observation?

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Physics

Arielle

The planet Jupiter has a mass that is equal to 318 times Earth's mass, an orbital radius of 5.21 AU, and an orbital velocity of 13.1 km/s. Earth's orbital velocity is 29.8 km/s. What is the ratio of Jupiter's orbital angular momentum to that of Earth's?

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Physics

Fiesta

I need this like right now!

Which of the following indicates that an exothermic reaction has occurred?

Temperature increases

Heat is absorbed

Salt is produced

Water is formed

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Physics

Jude Barber

Is time the fourth dimension?

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Physics

Sneakers

What is the speed of a proton after being accelerated from rest through a 5.6x107 V potential difference?

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Physics

Noah Snow

Assume that a pendulum used to drive a grandfather clock has a length L0=1.00m and a mass M at temperature T=20.00°C. It can be modeled as a physical pendulum as a rod oscillating around one end. By what percentage will the period change if the temperature increases by 10°C? Assume the length of the rod changes linearly with temperature, where L=L0 (1+αΔT) and the rod is made of brass (α=18*10-6°C-1).

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Physics

Kylan Hall

An object has more momentum if it has which of the following? A. a large mass and low velocity B. a high velocity and small mass C. a high velocity and large mass D. a low velocity and small mass

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Physics

Sparks

What is meant by the "objectivity" of web documents, and what are the three things to look for when evaluating a website for objectivity?

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Physics

Leonidas Tucker

Which planet was almost massive enough to have become a star?

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Physics

Freeman

Which resource is renewable but can be made unusable if not managed properly?

A. wind

B. biomass

C. sunlight

D. minerals and rocks

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Physics

Kallie Cortez

Apply Newton's first law to music playing on the radio.

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Physics

Bodie

Is platinum carbonate naturally occurring or human made?

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Physics

Jovanny Ayala

A 230-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,100 A. If the conductor is copper with a free charge density of 8.5 1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable? (Use 3.156 107 for the number of seconds in a year.)

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