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PLEASE HELP, NO ONE IS HELPING MEEEE :(While taking the stairs it takes you 10 seconds to reach the top. The next time you take the same stairs, it takes you 5 seconds to reach the top stair. During which of these trips up the stairs did you use more power to climb?
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The 4.0 -kg head of an ax is moving at 3 m/s when it strikes a log and penetrates 0.01m into the log. What is the average force the blade exerts on the log?
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If the positive charge of an atoms nucleus exactly balances the negative charge of the surrounding electrons the atom is_______ A neutral B staticC electrifiedD positively charged
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Which wave shown has more energy?
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1. David and Mat are training for the swimming team, swimming lengths of 25 metre pool. Mat swims four lengths in 125 seconds at a steady sped. A)After four lengths, how far has Mat swum? B)After four lengths, what is Mat's displacement?
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A gas has an initial volume of 21.7 L at a pressure of 0.4 atm and a temperature of 252 K. The pressure of the gas increases to 2 atm as the temperature increases to 323 K. What is the final volume of the gas? 3.4 L 5.6 L 8.5 L 11.1 L
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What type of cells don't have cell walls.
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Another class received similar data to what we saw yesterday. Their investigation found that it looks like water enters a plant through the roots and exits through the leaves when light shines on it. Below are three students claims to answer the question what happens to the water inside the plant?They have collected the same evidence as our class. Using the things we have done in class so far, provide written feedback to each student. Your feedback should identify what evidence could be used to support their claim. How does the evidence you have in your Thinking Deeper Documents, support (or not support) their claims? Think of ALL the things weve done so far in this unit and ALL of the videos weve seen. Student A: The same water molecules that come into the plant through the roots go out of the plant through the leaves. They just flow through the plant without changing.What evidence supports students As claim? Do you agree or disagree with student A? Why or why not? Student B: The water molecules that go into the plant are used to make food molecules, and other chemical reactions in the plant form water molecules that come out of the leaves.What evidence supports students Bs claim? Do you agree or disagree with student B? Why or why not?
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another one pls help
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The amount of erosion created by a river is affected by all of the following exceptamount of sedimenttemperature of watervolume of waterrivers slope
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What evidence would you observe if the law of conservation of mass is obeyed when mixing two solutions?
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Two magnets are held apart. Once released, the south pole of one magnet moves toward the north pole of another magnet until the magnets collide. How does the graph reflect the changes in energy that occur?(1 point)Kinetic energy is at its peak when the magnets are first released, then it decreases steadily. Energy stored in the magnetic field becomes zero.The kinetic energy of the system is derived from the thermal energy created by increased velocity. Energy stored in the magnetic field does not change.
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A cube of wood is 3 cm on each side. It has a mass of 27 g. What is its density?What is the mass of a billiard ball that has a volume of 100 cm and a density of 2.5 g/cm?
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50ml of water are 20was mixed with 100ml of water at 90,the density of water is about 1g\ml .determine de final temperature after mixing the sample of water
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Momentum is known as mass in motion and is related to how much ____________ is required to ____________ an objects __________ i really need this thanks
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Which education and qualifications are most helpful for Network Systems careers? Check all that apply.a high school degreea bachelors degreephysical strengthattention to detailnegotiation skillsproblem-solving skillsthe ability to learn quickly
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Complete the passage to describe the relationship between kinetic energy, internal energy, thermal energy, andtemperature.As the average kinetic energy of a substance increases, the internal energy vand so its thermal energyAs the thermal energy of a substance increases, the temperature
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as a person pushes a box across a floor, the energey from the person's moving arm is transfered to the box, and the box and the floor become warm during this processes what happens to energey?a it is increasedb it is conversedc it is decreased d it is created
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help please i will be glad
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6. The petrol in a petrol can weighs 2000g. The density of petrol is 0.8g/cm3.What is the volume of the petrol in the can in a) cm3 b)litres (1000cm3=1 litre)Pls help :((
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What kind of electromagnetic radiation has the shortest wavelength? The longest?
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6. The petrol in a petrol can weighs 2000g. The density of petrol is 0.8g/cm3.What is the volume of the petrol in the can in a) cm3 b)litres (1000cm3=1 litre)
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If a person can walk 2 m/s how far could they walk in an hour? A day? A year?
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Starting from rest a car travels a distance 60km at a uniform acceleration of 2ms-2. How much time it takes?
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