Concept explainers
In Problems 66 through 68 you are given the equation used to solve a problem. For each of these, you are to
- Write a realistic problem for which this is the correct equation.
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Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
- A suspicious physics student watches a stunt performed at an ice show. In the stunt, a performer shoots an arrow into a bale of hay (Fig. P11.24). Another performer rides on the bale of hay like a cowboy. After the arrow enters the bale, the balearrow system slides roughly 5 m along the ice. Estimate the initial speed of the arrow. Is there a trick to this stunt? FIGURE P11.24arrow_forwardParticles in an ideal gas of molecular oxygen (O2) have an average momentum in the x direction of 2.726 1023 kgm/s. What is a. their root mean square speed and b. the root mean square of their x component of velocity.arrow_forwardWhen determining the reactions at joints A, B, and C, what is the minimum number of unknowns for solving this ?problem 0.8 m 0.9 m 500 N 45° 0.5 m 1.2 m 0.4 m 4 a O 5 .b 0 6 .cO 3 d Oarrow_forward
- If A = 8.0 i 4.0 j and B = 12 i 6.0 j, which of the following is the equation that relates A and B? A. A = (1/2) B B. A = (1/3) B C. A = (1/4) B D.A = (2/3) B E. A = (2/5) Barrow_forwardEXCEL Spring Problem: An experiment is conducted to determine the value of a spring constant. Objects of varied mass are suspended from the spring and the spring deflections are measured. The results are as follows: Mass, m (kg) Deflection, x (mm) 5.3 15 7.1 22 10.2 31 12 38 15.4 45 Use EXCEL to determine the spring constant, k, in N/m.arrow_forwardUse the formula for „P, to solve the following question. A club with sixteen members is to choose three officers: president, vice-president, and secretary-treasurer. If each office is to be held by one person and no person can hold more than one office, in how many ways can those offices be filled? ways Enter your answer in the answer box. Us / 23 MacBook Air 80 F3 II F8 F2 F5 F6 F9 F10 F11 F12 @ #3 %24 4 ! & * 1 2 3 7 9. R Y U P. } A F H. V. M alt tion command corhmand option + I| * cOarrow_forward
- Alice and Bob work in a bakery. Bob frosts cupcakes 3 times faster than Alice does. Workingtogether Alice and Bob frost 80 cupcakes in an hour. At what rate does Bob frost cupcakes? Group of answer choices 25 cupcakes/hour 60 cupcakes 20 cupcakes/hour 20 cupcakes 60 cupcakes/hourarrow_forward4. Answer the below questions using this graph. V(V) 4 6 40 30 20 10 0 0 2 a. What is Ex at 1m? Answer: b. What is Ex at 4m? c. What is Ex at 7m? -x(m) 8arrow_forwardFind (if possible) a. AB and b. BA, if A = 1 −2 5 3 −4 4 4 4 −2 and B = 4 5 4 2 1 0 1 −2 4 .arrow_forward
- The Statue of Liberty in New York City is approximately 305 ft305 ft tall. How many U.S. dimes would be in a stack of the same height? Each dime is 1.35 mm1.35 mm thick. number of dimes: Each dime has a mass of 2.268 g.2.268 g. How much would the stack of dimes from the previous question weigh? mass: g What is the value, in dollars, of the same stack of dimes? value: dollars The 2017 U.S. gross domestic product (GDP) was valued at 19,390,604,000 dollars.19,390,604,000 dollars. How many Statue of Liberty‑height stacks of dimes are needed to match the GDP in value? number of stacks:arrow_forwardDetermine the magnitude of A+B. A = 2i – j+ 4k B= 4i + 2j– k A. V43 B. V46 C.-V46 D. V22arrow_forwardReduce the following ratio to its lowest terms and to an equivalent ratio with 1 as the smallest term. 13 : 5/18 : 18 2.2 : 7.9 : 65/4 Determine the following ratios in simplest form: a. 25 minutes to 4 hours and 50 minutes b. 500 m to 3.1 km c. 600 g to 10.4 kg What is the ratio of 12 minutes to 12 hours, reduced to its lowest terms? Can you please answer all. Thanksarrow_forward
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