Physics

A glass slides across a bar and slows down due to a kinetic friction of 0.175n. if the glass weighs 0.500n, what is the coefficient of kinetic friction between the glass and the bar?
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calculate the electric field at the centre of a square 60cm on a side if one corneris occupied by a +45uC charge and the other three corners are occupied by -31uC charge
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Pls. Im falling in class rnUse the data table that shows the estimation of the daily resting energy expenditure (REE) to explore how calorie requirements change as a person gets older. Follow the steps to calculate the REE for a person over time. Record your calculations in the table. 1. Decide to calculate the REE for a male or female. 2. Choose an adult weight. 3. Calculate the REE for the adult from age 18-29, 30-60, and over 60. Assume the adult maintains the same body weight at each age
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Do you think it is plausible for other pairings of the galilean satellites to eclipse each other? explain your answer.
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A rifle with a weight of 30 N fires a 5.0-g bullet with a speed of 300 m/s. (a) Find the recoil speed of the rifle. (b) If a 700-N man holds the rifle firmly against his shoulder, find the recoil speed of man and rifle.
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The team coach is watching the bowler. She notes in Table 1 howfar the ball travels, and the time taken to reach the batsman. Table 1Ball12345Time in s0. 420. 460. 480. 550. 58Distance in m17. 5518. 3018. 4017. 9017. 75Suggest a pattern, if any, between the time the ball is in flight andthe distance the ball travels. What is the resolution of the stopwatch the team coach uses totime the ball?
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What force is responsible for the orbit of satellites?- energy- friction- magnetism- gravity
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A lot of points describe, in terms of subatomic particles, what occurs when a person experiences a static "shock"
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A supermarket operator must decide whether to build a medium size supermarket or a large supermarket at a new location. Demand at the location can be either average or favourable with estimated probabilities to be 0. 35 and 0. 65 respectively. If demand is favorable, the store manager may choose to maintain the current size or to expand. The net present value of profits is $623,000 if the firm chooses not to expand. However, if the firm chooses to expand, there is a 75% chance that the net present value of the returns will be 330,000 and 25% chance the estimated net present value of profits will be $610,000. If a medium size supermarket is built and demand is average, there is no reason to expand and the net present value of the profits Is $600,000. However, if a large supermarket is built and the demand turns out to be average, the choice is to do nothing with a net present value of $100,000 or to stimulate demand through local advertising. The response to advertising can be either unfavorable with a probability of 0. 2 or faverable with a probability of 0. 8. If the response to advertising is unfavorable the net present value of the profit is ($20,000). However, if the response to advertising is favourable,then the net present vale of the profits in $320,000. Finally, if the large plant is built and the demand happens to be high the net present value of the profits is $650. 0. Dram a decision tree and determine the most appropriate decision for this company
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3.5g of liquid in 4mins with a pressure gradient of 10cm is how many m/s
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X-ray pulses from cygnus x-1, a celestial x ray source, have been recorded during high-altitude rocket flight. the signals can be interpreted as originating when a blob of ionized matter orbits a black hole with a period of 4.81 ms if the blob were in a circular orbit about a black hole whose mass is 27.7 times the mass of the situ, what is the orbit radius? the value of the gravitational constant is 6.67259 x 10^-11 n .m^2/kg^2 and mass of the sun is 1.991 x 10^30 kg. answer n units of km.
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According to the book, the small electric devices that, like vacuum tubes, could receive and amplify radio signals were known as:
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You are participating in a fresh water fishing tournament with the goal of catching the heaviest fish. You are in the middle of the river when you finally get your catch; unfortunately, you realize that you left the spring scales in your car. All you have in the boat are the paddles, your 16 Oz coffee mug, some rope, measuring tape, and a plastic bag. Required:Estimate the mass of the fish (in kilograms) using these items
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What is the definition of physical activity? A. a movement that stimulates your respiratory system B. a movement that causes perspiration C. a movement that results in the bodys use of energy D. a movement that requires little effort
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a stationary magnet has its north pole pointing upward. a conducting circular loop is moving downwards beneath the magnet. the induced current in the coil, as seen from above, and the force on the conducting loop due to the magnet are:
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if it requires 6.0 j of work to stretch a particular spring by 2.0 cm from its equilibrium length, how much more work will be required to stretch it an additional 4.0 cm
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Suppose you are sitting in a boat that is motionless on the water. What happens when someone standing on a dock nearby tosses a watermelon to you, assuming that you catch it? Explain this outcome according to the law of the conservation of momentum. Please Show work. I need help.
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What does kinetic energy depend on? (choose all that apply)a massb heightc speed d time
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4. An open cylinder is filled with water to a height of 0.5m. What is the absolute pressure on the base area? s
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Explain why knowing a combination of grappling and striking martial arts is advantageous during a street self defense scenario. Explain how both are beneficial
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The caloris basin on mercury covers a large region of the planet, but few craters have formed on top of it. from this we conclude that the :_________.i. caloris basin was formed by a volcano. ii. erosion destroyed the smaller craters that formed on the basin. only very large impactors hit mercury's surface in the past. iii. the caloris basin formed toward the end of the solar system's period of heavy bombardment. iv. mercury's atmosphere prevented smaller objects from hitting the surface.
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Bart has rubbed a balloon with wool to give it a charge of -1.0 x 10-6 c. he then acquires a plastic golf tube with a charge of +4.0 x 10-6 c localized at a given position. determine the distance between the golf tube and the balloon if the electrical force between the two is -1.0 x 10-5 n.
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Stephen rubbed one balloon on his hair for 10 seconds.Then he grabbed another balloon and rubbed it on his hair for 10 seconds.What will happen if he ties a string to each balloon and places them next to each other?a The two balloons will repel. b The two balloons will attract. c The two balloons will do nothing since they are not charged.
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A diode has a high resistance in the __________ direction. Which word completes this sentence?
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