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Cordell Curtis
A certain radioactive substance has a half life of one hour. if you start with 1g of the material at noon how much will be left at 3:00 PM?
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Miracle Acevedo
Would two north poles attract each other or push away frim each other
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Kennedy Spears
Who was the first man to go into the orbit?

a. alexander leonov

b. deke slayton

c. valentina tereshkova

d. yuri gagarin
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Shannon
What factor about the planets caused you to weigh more or less?
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Guest
Which energy transformation occurs in an

operating electric motor?

(1) electrical → mechanical

(2) mechanical → electrical

(3) chemical → electrical

(4) electrical → chemical
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Adalyn Shaffer
A proton that has a mass m and is moving at + 164 m/s undergoes a head-on elastic collision with a stationary carbon nucleus of mass 12m. the velocity of the proton after the collision is answer
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Devon Acosta
Short wavelengths of visible light interact more frequently with the atoms in glass than do longer wavelengths. Does this interaction time tend to speed up or slow down the average speed of light in glass?
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Kadin Hardy
Two trains traveling on parallel tracks are going toward each other from a distance of 552 miles. If the freight train is moving at 38 mph and the passenger train is moving at 54 mph, when will the trains pass each other?
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Harper Parks
What significant contribution did Lavoisier make to chemistry?
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Jeremiah Duarte
The study of blood applied to crime is referred to as what
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Alivia
How is pounds of force measured
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Tiffany
In an air conditioner, a substance that easily evaporates and condenses is used to transfer energy from a room to the air outside. when the substance evaporates,

a. energy is transferred by conduction.

b. it absorbs energy as heat from the surrounding air. selected:

c. it transfers energy as heat to the surrounding air. this answer is incorrect.

d. energy is transferred by convection.
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Saul
If a particle undergoes shm with amplitude 0.21 m, what is the total distance it travels in one period?
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Kline
The main difference between a radio wave and a sound wave is their different.

A) wavelengths.

B) frequencies.

C) amplitudes.

D) energies.

E) modes of travel.
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Janiyah Kerr
A student is measuring the effects of an electric circuit on a compass, and he is testing to see increasing the current will cause the compass needle to change direction faster. He does one trial using a 9-volt battery and another trial using a 1.5 volt battery. He takes accurate data. Based on good experimental design, which would improve his experiment?

A. he should use batteries of the same voltage but from different manufacturers to show he has used different variables.

B. He should add a nonworking Compass to act as a control.

C. He should repeat the test with three additional batteries of varying voltages to demonstrate the reproducibility of results.

D. He should use only one battery but do several trials using different circuit designs to ensure he is appropriate test groups.

(I think it's a or c)
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