Physics

this one too!! need just 1 answer about this system
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The block falls for a time t0, but the string does not completely unwind. What is the change in angular momentum of the pulley-block system from the instant that the block is released from rest until time t0?
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An unbalanced force acting on an object will cause it to? A. Increase in mass. B. Decrease in mass. C. Accelerate. D. Remain at rest.
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If a rock is thrown upward on the planet Mars with a velocity of 15 m/s, its height above the ground (in meters) after t seconds is given by H = 15t 1.86t2. (a) Find the velocity (in m/s) of the rock after 1 second. 11.5404 Incorrect: Your answer is incorrect. seenKey 11.28 m/s (b) Find the velocity (in m/s) of the rock when t = a. m/s (c) When (in seconds) will the rock hit the surface? (Round your answer to one decimal place.) t = s (d) With what velocity (in m/s) will the rock hit the surface?
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waves disturb a medium by causing the particles to_____.
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the distibution on the condutor
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Two cities in the same climate zone must have the same climate and weather conditions. Why is this statement true or false? A. It is false because cities in the same climate zone must have different climates. B. It is false because the two cities might differ in their proximity to water. C. It is true because the two cities are at the same latitude. D. It is true because the two cities will be closer to the equator.
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When must scientific theories be changed
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If something weighs 2891N on earth, whats its mass?
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A thin 1.5 mm coating of glycerine has been placed between two microscope slides of width 0.8 cm and length 3.9 cm . Find the force required to pull one of the microscope slides at a constant speed of 0.28 m/s relative to the other.
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An apple weighing 1 N fall a distance of 1 m how much work is done on the Apple by the force of gravity
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A weight of 200 n is hung from a spring with a spring constant of 2500 n/m and lowered slowly. How much will the spring stretch?
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What is atmospheric pressure?
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Can you hear the vibrations a tuning fork puts off when hit?
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What do all waves transfer?Question 1 options:matter energyparticleswater
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Marla pushes on a bag of mulch with a force of 160 N. Dale helps her, pushingwith a force of 230 N in the same direction as Marla. The frictional force betweenthe bag and the floor is 90 N. What is the total force the bag of mulch feels? Drawa diagram to scale
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Who is the father of the humans
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a small block with mass 0.04 kg is moving in the xy-plane. the net force on the block is describe by the potential energy function U(x,y) = (5.80 j/m2)x2 - (3.60 j/m3)y3. What are the magnitude of the acceleration of the block when it is at the point (x=0.30m , y=0.60m ) ?
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The change in momentum that occurs when a 1. 0 kg ball traveling at 4. 0 m/s strikes a wall and bounces back at 2. 0 m/s is.
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If an object accelerates from rest, with a constant acceleration of10 m/s2, what will its velocity be after 2 s?
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13.Jenny and her brother Tom sit on opposite ends of a seesaw. Jenny is40 kg and her brother is 30 kg. If Jenny sits 1.5 meters from the pivotpoint and Tom sits 1 meter from the pivot point, what is the net torqueon the seesaw?
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Youll start by investigating how earths surface temperature varies. open my nasa data, and click on data set in the top left corner of the page. within the atmosphere category, select all data, then select temperature. now, select monthly air surface temperatures. after the new map appears on your screen, select the animate option near the top of the page, and then select ok to see the animation. set the time range on the animation for the most recent five years, and then click submit. you can control the speed of the animation with the controls beneath the map.question 1describe patterns you observe in earths surface temperature. how do these patterns change during the course of a year and from year to year? use lines of latitude and degrees celsius in your description.
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Scientists predict that in another 250 million years, the continents will be located in different positions. How is this possible? *
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The value of gravitational pull on the moon is 1.6m/s/s. what is the weight of a 85kg astronaut on the moon? weight=mass=gravity=formula:substitution: answer:
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