Physics

20 points) How is BMI weight calculated?Divide weight by 678.Double weight.Subtract weight from heart rate.Multiply weight by 703.
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What is the weight of car at 25th percentile and 75th percentile? of 1155,1100,1540,1760,1390,90,1610,1305,1685,1425,1365,1655,1465,1515,1130,1440,1275
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Why do nuclear reactions tend to produce more energy than chemical reactions? A. In chemical reactions, the total amount of energy and mass is not conserved B. In nuclear reactions, some mass is converted to energy C. In Chemical reactions, some mass is converted to energy D. In nuclear reactions, the total amount of energy and mass is not conserved
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You decide to go skiing but fall over. As you are attempting to get back up, you see a child start to head down the hill straight for you. If the coefficient of friction between the child and the snow is assumed to be 0, and the child appears to be 20 m above you when they start down the mountain, and the incline of the mountain is 31 degrees, how long do you have to get up and out of the way before you and the child collide?
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A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station.
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on how many factors amount of energy carried by wave depends?
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If I make a tortilla by mixing 55 grams of flour and 20 grams of water how much mass should my tortilla have
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Two new materials have been discovered. One is shinyand has a metallic look, while the other is dull andhas a non-metallic look. Although you think that oneis a conductor and the other an insulator, you wantto be certain. Describe a test you could do to test theconductivity of these two materials.
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6) In a purely electric vehicle, energy usually is stored in batteries. The stored energy is used topower the vehicle until the energy is depleted, and then energy has to be stored once more byrecharging the batteries. An electric wheelchair has a mass of 26 kg and is customdesigned for aperson with a mass of 80. 0 kg. The stored energy available in its batteries is 2. 4106J. Thewheelchair motor requires a power of 340. 0 W for driving under typical conditions. This issufficient to propel the person in the wheelchair along at a speed of 24 km/h. a. Determine the work done by the motor when the wheelchair starts at rest and speeds up toits normal speed. b. Determine the maximum distance that the wheelchair can travel on a horizontal surface at itsnormal speed, using its stored energy. (Ignore the energy needed for it to speed up when itstarts. )c. Suppose that 0. 023 percent of the power required for driving is expended against drag dueto the flexing of the wheelchairs soft rubber tires. Calculate the magnitude of the drag force
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What is the electric potential at points A , B , and C in (Figure 1)? Suppose that q = 1. 5 nC , r1 = 1. 0 cm , and r2 = 2. 1 cm
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an airplane is flying at an elevation of 5150 feet, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane and the angle of depression to one car is 35 degrees and to the other car is 52 degrees, how far apart are the cars?
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A thermodynamicist claims to have developed a heat pump with a cop of 1. 7 when operating with thermal energy reservoirs at 273 k and 293 k. Is this claim valid?.
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what do we need to measure in order to determine a star's luminosity? what do we need to measure in order to determine a star's luminosity? apparent brightness and mass apparent brightness and temperature apparent brightness and distance
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A car is driven 215 km west and then 98 km south west (45 degree). a)what is the displacement of the car from the origin point? b) what is the directions
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what is the momentum of an 80 kg ice skater gliding across the ice at a speed of 5 m/s
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Which has a larger angular velocity, the rubber stopper or the blue tape? A. They are the same - the sweep out the same angular displacement (radians or degrees) in the same amount of time. B. The rubber stopper because it is moving faster and traveling farther. C. The blue tape because it is closer and therefore takes less time to make a revolution
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Which scientist is credited with the development of modern models of our solar system using the heliocentric model?.
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A bar of length L = 0. 36m is free to slide without friction on horizontal rails. A uniform magnetic field B = 2. 4T is directed into the plane. At one end of the rails there is a battery with emf = 12V and a Switch S. The bar has the mass 0. 90kg and resistance 5. 0ohm. Ignore all the other resistance in the circuit. The switch is closed at time t = 0. A) Just after the switch is closed, what is the acceleration of the bar? b)what is the acceleration of. The bar when its speed is 2. 0m/s? c) what is the bar's terminal speed?
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To work a ball of dough with the fingertips or heels of the hands by repeating press, fold, and turn motions is to
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How much force is required to pull a spring 0.412 m from its equilibrium position ifthe spring constant is 2,441.5 n/m?
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HELP ASAPThe specific heat capacity of solid copper metal is 0.385 J/g-K. How many joules of heat are needed to raise the temperature of a 1.55-kg block of copper from 33.0 C to 99.9 C?3.71 10^6J39.9 J3.99 10^4J0.00371 J2.69 10^5 JIT IS A CHEMISTRY QUESTION BUT WAS PUT WITH PHYSICS BY MISTAKE SORRY
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Two cars are moving with velocities 70 km/hr and west direction respectively.Find their relative velocity.
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Two identical test dummies are each dropped from a height of 3. 00 m. The first is dropped onto the concrete, and the skull fractures. The 2nd is dropped in the same manner also onto concrete but is also wearing a bicycle helmet and the skull does not fracture. Use the terms force, impulse, and time to explain why the two identical test dummies dropped in the same manner had very different outcomes
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Which observation supports a model of the nature of light in which light acts as a wave
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