Physics

Koby placed teaspoon of baking soda into each of two identical glasses. He noticed the baking soda was lumpy, so he used a fork to break up the lumps. Why is it important to break up the lumps?
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A car starting from rest moves with constant acceleration of 2.0 m/s2 for 10 s, then travels withconstant speed lor another 10 s, and then finally slows to a slop will conslanl acceleration of-2.0 m/s2. How far does it travel?
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Paula is sailing across a lake. As the boat accelerates, she thinks about howthe wind is pushing on the sail. Which statement below best representswhat is happening between the sail and the air?A. The sail is pushing the wind back and slowing down the air. B. The sail and air are not pushing each other, they are just moving together.C. The air is pushing on the sail, but the sail is not pushing the air. D. The sail is pushing the wind forward with the air.Which statement do you most agree with? Explain you reasoning.
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Which one of the statements below is true about mechanical waves?They must travel in empty space.They can travel in a vacuum.Both sound and light are examples of mechanical waves.They require a medium to travel through.
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what is the velocity of a car that went a distance of 400ft in 25 seconds
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PLEASE HELP ME WITH THIS ONE QUESTION A piston has a volume change of 7 x 10^-6 m^3. Assuming atmospheric pressure is 101,325 J, what is the work needed to change the piston volume?
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6. A tuning fork, frequency 384 Hz, produces resonance with a closed tube 20.0 cm long. What is the speed of sound? 7. What is the frequency of a tuning fork that resonates with an open tube 25.0 cm long. Speed of sound that day is 343 m/s Please show the work
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In the playground game of tetherball, a ball tied to a rope circles a pole, wrapping the rope around the pole is it goes. Opponents compete to wrap the ball around the pole in one direction or the other; the game ends when the rope is entirely wrapped around the pole and the ball touches the pole. If you get the ball going around in one direction, as the rope shortens and the ball goes in smaller and smaller circles, the ball goes around with a shorter and shorter period.Required:Explain why this happens.
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A rocket weighs 1.000. N on the surface of Earth. What is its weight at a distance of two Earth radii above thesurface of Earth?P.5B0 111.0 N250.0 N333.0 N5000 N
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help me besties PLEASE ;-;
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Thomson observed that cathode beams can pass undeflected through crossed electric and magnetic fields. Which of the following quantities must then be common to the particles making up these beams? A. Mass B. Size C. Magnitude of charge D. Sign of charge E. Sign and magnitude of charge F. Velocity
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One of the advantages of alternating current (ac) over direct current (dc) is the ease with which voltage levels can be increased or decreased.a. Trueb. False
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PLEASE I NEED HELP from an actual person who isn't going to give me links to hack me :( Differentiate the between, Heat, Thermal Energy, and Temperature.
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1+1=69 how is it possible
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A plane is flying with an airspeed of 190 miles per hour and heading 150. The wind currents are running at 30 miles per hour at 170 clockwise from due north. Use vectors to find the true course and ground speed of the plane. (Round your answers to the nearest ten for the speed and to the nearest whole number for the angle.)
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What is a bright streak of light that results from a space rock burning in earths atmosphere? A. Meteor B. Asteroid C. Meteorite D. Meteoroid
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A 69.5-kg person throws a 0.0475-kg snowball forward with a ground speed of 31.5 m/s. A second person, with a mass of 57.5 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 2.35 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged
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An object has an acceleration of 18.0 m/s/s. If the net force acting upon this object were doubled, then its new acceleration would be m/s/s.
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Two satellites are monitored as they orbit the Earth; satellite X is eight (8) times as far from the Earth's center as is satellite Y. Using Kepler's 3rd Law, by what factor is the the period (or revolution) of satellite X that of satellite Y
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The diagram shows a roller-coaster track. Assume that the system is closed.At point E, the roller-coaster car has just exited the vertical loop.Which statement best describes the relative amounts of potential and kineticenergy of a roller-coaster car at point E?O A. Kinetic energy is at almost 0%, and potential energy is at almost100%O B. Both kinetic and potential energy are at almost 0%.O C. Both kinetic and potential energy are at almost 100%.OD. Potential energy is at almost 0%, and kinetic energy is at almost100%
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35 POINTSS!!! PLSSSS HELLPPP!!! Work is the transfer of power from one object to another.Please select the best answer from the choices providedTF
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Why isn't nuclear fusion used to generate electric energy in power plants?A.It requires extremely high pressure.B.It uses a very rare radioactive isotope.C.It releases less energy per gram than uranium does.D.It requires converting matter into energy.
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Does anbody know?????
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(20 points) You are at the center of a boat and have been rowing the boat for a long time. You weigh only 80 kg and your 120 kg buddy Bubba has been riding at the front of your 60 kg, 4 m long boat. You come to a stop in the water and then switch places. A) What is the center of mass before you switch places
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