Ultimate Physics Study Guide - Questions & Answers

A truck and a car are moving with equal velocity.on applying the same breaking Force,both will stop at a certain distance.then whether truck or car will cover less distance or both cover equal distance.?
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brake fluid serves as a lubricant for the parts of the hydraulic system and ensures smooth and even operation.
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A wire loop, 2 meters by 4 meters, of negligible resistance is in the plane of the page with its left end in a uniform 0.5-tesla magnetic field directed into the page, as shown above. A 5-ohm resistor is connected between points X and Y. The field is zero outside the region enclosed by the dashed lines.
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Suppose you have the following circuit diagram.Here R1=22k, R2=33k, R3=1.1k, R4=3.3k, R5=33k, R6=11k, R7=33k, R8=1.1k, R9=3.3k are the resistances on the circuit where k stands for kilo ohm. The electromotive forcesof the batteries are E1=3volts and E2=6volts.Figure 1a) Calculate Rbk, the resistance equivalent to R5, R6, R7, R8, and R9 between theterminals b and k.b) Calculate the current through R1.c) Calculate the current through Rbk and call it Ibk.d) Calculate the power dissipated by the R2 resistor.e) Calculate the potential difference across the oc terminal.
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Hurricanes are large storms that form over warm waters out in the ocean. hurricanes are associated with low-pressure regions in the atmosphere. how does the low pressure associated with a hurricane help them to grow big and powerful?
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a stone was dropped off a cliff and hit the ground with a speed of 120 ft/s. what is the height of the cliff?
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Does the addition od 5N forces always give a 10 N force?
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what is the relative velocity of the two spaceships? express it as a ratio to the speed of light. let the relative velocity of the spaceships be positive if they are approaching each other and negative if they are moving apart from one another.
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an object is placed on a common central axis of two thin lenses. the distance from the object to the first lens is 19 cm. the distance between the two lenses is 35 cm. the first lens is a converging lens with a focal length of 9.9 cm. thesecond lens is a diverging lens with a focal length of 9.0 cm. what is the magnification of the system?
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the three modified atwood's machines shown below have blocks of mass m on a frictionless surface and hanging from a string. when the blocks are released, they accelerate as they did in our lab. a. which system has the greatest net force? explain how you know.
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how many full spectral orders can be seen (400 to 700 nm ) on each side of the central maximum when it is illuminated by white light?
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b) how far will the cart move in the 4.5 s if the shopper places a(n) 84 n child in the cart before pushing it? answer in units of m.
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a mountain 6.0 km from a person exerts a gravitational force on him equal to 2.30% of his weight. calculate the mass of the mountain.
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which properties of the solar system are accounted for in this simple series of three diagrams depicting the solar nebula hypothesis?
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a sustained measured exposure dose of 280 msv/hr was measured 100 m from a source. the evacuation zone was set at 35 km from the source. estimate the exposure rate at 35 km from the source.
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if a pendulum-driven clock gains 7.80 s/day, what fractional change in pendulum length must be made for it to keep perfect time? (your answer should be negative if the length is decreased.)
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will the subsequent motion be a clockwise or counterclockwise orbit? will the subsequent motion be a clockwise or counterclockwise orbit? clockwise counterclockwise
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2. a rock is thrown downward from the top of a 40 m tower with an initial speed of 12 m/s. assuming negligible air resistance, what is the speed of the rock just before hitting the ground?
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in an experiment, block is given an initial speed toward block , which is initially at rest. the blocks are on a track that has a motion detector set up, as shown above. when the two blocks collide, there is a completely inelastic collision and the blocks move together with speed . the blocks were both placed on a balance, and it is determined that they have the same mass. the experiment is repeated for four different initial speeds, and the data are shown in the chart below. it appears that the resulting data are not accurate. which measurement most likely produced errors in the data seen in the chart below?
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estimate the velocity with which you would contact the ground if you jumped from an airplane at an altitude of 5000 ft and (a) air resistance is negligible, (b) air resistance is important, but you forgot your parachute, or (c) you use a 25 ft diameter parachute.
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the wire carrying 400 a to the motor of a commuter train feels an attractive force of 4.00x10-3 n/m due to a parallel wire carrying 5 a to a headlight. how far apart are the wires? (enter the answer in 3 significant figures)
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a motorboat heads due east at 16.0 m/s across a river that flows due south at 9.0 m/s. the river is 136 m wide. how long does it take for the boat to reach the opposite side of the river? how far south of a point even with its starting point does it land?
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a 1.7 m high marble ramp is set up on a 3 m high table. the marble leaves the ramp at the edge of the table with only horizontal velocity. what is the velocity of the marble as it leaves the ramp? 5.77 m/s 7.67 m/s 9.6 m/s 3.57 m/s
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A British Thermal Unit (BTU) is defined as the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit. Your family has a water heater that is rated for 30,000 BTUs and has a capacity of 500 pounds of water. What is the expected change in temperature of the water?a. 140 Fb. 120 Fc. 90 Fd. 60 Fe. 30 F
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