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Guest
What is not the purpose of peer review in science?

to validate conclusions

to conduct secret research

to check the accuracy of data

to obtain feedback from other scientists
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Paige Hayden
What is an example of 'Centre of Gravity'?
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Jacqueline Waller
The Mass number of an element is the?

A. number of protons plus electrons

B. number of protons only

C. number of protons plus neutrons
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Guest
Momentum of a system is conserved only when question 16 options: there are no internal forces acting on the system. the system is not moving. there are no forces acting on the system. there is no net external force acting on the system. the system has zero momentum.
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Gabriella James
what is the necessary condition on a force the result the conservation of angular momentum for a particle affected by that force?
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Bits
How to find voltage reading?
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Kelly Harrell
A brick moves across a rough surface at constant velocity. Which of the following are forces that should be included in a free body diagram? (select all that apply) gravity friction applied force force of motion
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Donovan Nguyen
A 20kg cannonball is fired into a stationary 500kg boulder at on the edge of a 125m high cliff. If the cannonball remains in the boulder and together they land 140m horizontally from the edge of the cliff, what was the initial speed of the boulder?
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Emanuel Frederick
According to the law of refraction, light passing from air into a piece of glass at an angle of 30 degrees will cause the light to
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Tabitha Richard
At any angular speed, a uniform solid sphere of diameter D has the same rotational kinetic energy as a uniform hollow sphere of the same diameter when both are spinning about an axis through their centers. The moment of inertia of a solid sphere is :
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Ferris
A body will maintain a constant negative electrostatic charge if the body

A) maintains the excess of electrons

B) continously receives more protons than it loses

C) continuously receives more electrons than it loses

D) maintains the same excess of protons
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Creedence
Which statements describe the results of the effect of angle of insolation on absorption experiment? Check all that apply.

At 3 minutes, the soil temperature at a 0° angle of insolation is higher than at 90°. At 6 minutes, the soil temperature at a 45° angle of insolation is higher than at 0°. At 9 minutes, the soil temperature at a 90° angle of insolation is lower than at 45°. At 12 minutes, the soil temperature at a 45° angle of insolation is lower than at 0°. At 15 minutes, the soil temperature at a 90° angle of insolation is higher than at 45°.
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Hana Davies
A cat jumps off a table which is 1.5 m high. If the initial velocity of the cat is 10 m/s, at an angle of 37 degrees above the horizontal, how far from the edge of the table does the cat land?
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Ashanti Norris
How many water

molecules does the hydrate

LINO, •H2O have?
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Enrique Bean
the time of a collision experienced by a driver is 0.1 seconds without an air bag, with an air bag this is increased to 0.5 seconds. Explain the benefits of this detail
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