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Bria Daniel
Why must you operate the exhaust blower before starting a boat's inboard gasoline engine?
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Susan Frank
you drive in a straight line at 20.0m/s for 10.0 min, then 30.0m/s for another 10.0 min. Find the average speed.
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Serenity Nash
Yeast produce offspring that usually have
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Elliott Velez
A current of 15 amps flows for 8.5 seconds, then the charge is?

123 J

1.829 J

0.54667 J

None of the other answers are correct
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Levy
Which biome is home to half of earth's species?

a. tropical rain forest

b. taiga

c. temperate deciduous forest

d. grassland
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Guest
Desiree has a scientific question that she wants to investigate. She has developed a hypothesis and method for her experiment. Which step of scientific inquiry should Desiree take next?

Desiree should present her findings to her teacher and classmates.

Desiree should collect data, which may support or refute her hypothesis.

Desiree should provide an explanation for her results.
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Karen Oconnor
A total Δν of 15 km/s is required to achieve an interplanetary mission. The proposed rocket has two stages. The first stage alone has a mass of 1000 tonnes and consists of 10 solid rocket boosters and a liquid rocket motor. The liquid rocket has a specific impulse of 300 s and a fuel mass flow rate of 1500 kg/s. The solid rocket boosters have a specific impulse of 250 s and a fuel mass flow rate of 200 kg/s. The first stage burn time is 1 minute. The first stage is jettisoned immediately after burn-out. The second stage has an initial mass of 150 tonnes. The second stage motor provides an effective exhaust velocity of 4 km/s and has a structural coefficient of 0.05. The rocket carries a 2 tonne payload. a. What is the jettisoned mass of the first stage?
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Guest
Spacecrafts have landed on the surface of which planet?

Saturn

Mars

Venus

Jupiter
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Karley Sweeney
Which geochemical cycle involves mantle convection
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Davion Matthews
Which type of eclipse would you expect to see when the moon passes directly through the moon and the sun?
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Kennedy Schroeder
Like magnetism, static electricity can attract and repel.

True

False
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Gracelyn
When a sound wave first enters the auricle, which part of the ear does it travel through on its way to the eardrum?

auditory nerve

cochlea

hammer

ear canal
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Jillian Farrell
Isla made a diagram to compare X-rays and radio waves. A venn diagram with two intersecting circles. The one on the left is labeled x-rays and the one on the right is labeled radio waves. There is an A in the one on the left, a C in the circle on the right and a B in the intersecting section. What should Isla write in the areas marked A, B, and C? A: Has a longer wavelength B: Can travel only through matter C: Has a higher frequency A: Has a higher frequency B: Can travel only through matter C: Has a longer wavelength A: Has a higher frequency B: Travels at the same speed C: Has a longer wavelength A: Has a longer wavelength B: Travels at the same speed C: Has a higher frequency
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Peyton Barber
What is the magnitude of electrostatic force of attraction between two alpha particles separated

at a distance 5.3x10-11m? (1 apha particle = change of proton)
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Camron Arnold
A block of material of volume 20cm³ and density of 2.5gcm³suspended from a

spring balance with half of the volume of the block immersed in water. What is the

reading of the spring balance?
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