Physics

Item 1The figure presents a block on a horizontal surface attached to a horizontal spring. The other end of the spring is attached to a wall. The spring is labeled 50 newtons per meter, and the box is labeled 0.5 kilogram. The horizontal position of the center of spring is x equals negative 0.3 meter. The horizontal position of the center of the box is x equals 0 meters. When the spring is stretched the box will be at a horizontal position of x equals 0.3 meter.A block of mass 0.5kg on a horizontal surface is attached to a horizontal spring of negligible mass and spring constant 50N/m. The other end of the spring is attached to a wall, and there is negligible friction between the block and the horizontal surface. When the spring is unstretched, the block is located at x=0m. The block is then pulled to x=0.3m and released from rest so that the block-spring system oscillates between x=0.3m and x=0.3m. What is the magnitude of the acceleration of the block and the direction of the net force exerted on the block when it is located at x=0.3m?Magnitude of Acceleration Direction of Net Force30m/s2 Positive, Magnitude of Acceleration Direction of Net Force 30 meters per second squared PositiveMagnitude of Acceleration Direction of Net Force30m/s2 Negative, Magnitude of Acceleration Direction of Net Force 30 meters per second squared NegativeMagnitude of Acceleration Direction of Net Force0 m/s2 Positive, Magnitude of Acceleration Direction of Net Force 0 meters per second squared PositiveMagnitude of Acceleration Direction of Net Force0 m/s2 Negative
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What is the wavelength of an electromagnetic wave?aThe number of waves that pass a point in a certainamount of time.bThe distance a wave can travel through emptyspacec The height of the wave from top to bottomdThe distance between the peaks of two waves thatare next to each other
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Two identical charges are located 1 m apart and feel a 1 N repulsive electric force. What is the charge of each particle.
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A thin rod of length d on a frictionless surface is pivoted about one end
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Which statement describes the particles that make up the rigid structure of a three-dimensional crystalline solid?A. They move more quickly than the particles in the gas of the substance. B. They move more quickly than the particles in the liquid of the substance. C. They move around freely to various locations in a random pattern. D. They move by vibrating in their locations within a fixed pattern.
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Define resistance of a conductor. State the factors on which resistance of a conductor depends.Name the device which is often used to change the resistance without changing the voltage source in an electric circuit.Calculate the resistance of 50 m length of wire of cross-sectional area 0.01 square mm and of resistivity 5 10 ^-8 ohm m
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A quantity of 1.922 g of methanol (CH3OH) was burned in a constant-volume calorimeter. Consequently,the temperature of the water rose by 4.20 C. If the heat capacity of the bomb plus water was 10.4 kJ/C,calculate the molar heat of combustion of methanol.
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what is one type of compact star with a mass similar to the sun but a diameter similar to earth?
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17) Which object would likely have the greatest velocitya. a bouncy ballb. a bowling calla go-kartd. a school bus
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define one meter lendth
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Calculate the range of wavelengths that are received by the radio in a car. Suppose that the range of frequencies of FM radio is 88.0 MHz to 108 MHz.
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In outer space, a piece of rock continues moving at the same velocity forthousands of years. What makes this possible?
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What is current of 12 ohm? help me pleasee
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The energy for _____ transport comes from the gradient itself
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What is Al's hypothesis?options:If I freeze fresh water and salt water then the salt water will freeze more quickly because salt increases the freezing point temperature.If I freeze fresh water and salt water then the fresh water will freeze more quickly because salt lowers the freezing point temperatureIf I freeze fresh water and salt water then both will freeze at the same time because salt doesn't affect the freezing time.If I freeze cool aid and water then the water will freeze more quickly because cool aid increases the freezing point temperature.
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A student watches the tide change, and sees water waves pass the end of the dockthat follow the pattern shown below:13)The student counts the waves with a stopwatch, and determines that it takes 8.75seconds for a single wave to go by. The wave frequency is ----
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What is the moons gravity
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Use the electron arrangement interactive to complete the table
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Find the temperature
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aWhich of these is a chemicalchange?A. water boilingB. salt disolvingC. paper burning
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The field found in this problem for a moving charge is the same as the field from a current element of length dl carrying current i provided that the quantity qv is replaced by which quantity?
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2. What is the difference between electric potential energy and gravitational potential energy? Name oneexample of an object having one type of potential energy but not the other.
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i need help, please. ASAP!!!!
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a=5i+4j-6k ,b=-2i+2j+3k ,c=4i+3j+2k. find the vector perpendicular to a and c
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