Magnitude of the normal force acting on the block
A force of 70.0 N is exerted at an angle of 30.0° below the horizontal on a block of mass 8.00 kg that is resting on a table. What is the magnitude of the normal force acting on the block?
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How much work must be done to bring three electrons from a great distance apart to 4.0×10-10 m from one another (at the corners of an equilateral triangle)?
The pulse rates for 13 adult women were as follows. Construct a 0.99 confidence interval for the mean pulse rate. (Give your answers correct to one decimal place.) 71 70 62 65 107 95 61 81 98 67 57 89 63 Lower limit Upper limit
Determine the a) amount of paddle wheel work in Btu after 45mins b) final temperature c) final pressure of the helium gas.
Calculate the melting point of ice under a pressure of 10.0 MPa. Assume that the density of ice under these conditions is approximately 0.915 g/cm3 and that of liquid water is 0.998 g/cm3.
The recommended number of hours of sleep per night is 8 hours, but everybody "knows" that the average college student sleeps less than 7 hours. The number of hours slept last night by 10 randomly selected college students is listed below.
A 0.060-H inductor is wired across the terminals of a generator that has a voltage of 2.5 V and supplies a current of 0.022 A. Find the frequency of the generator. Note: The ac current and voltage are rms values and power is an average value unles
Nitrogen and Hydrogen are introduced into a vessel at partial pressures of 2.00 bar in each case. The two phases are allowed to come to equilibrium with their product ammonia in a vessel of fixed volume and at a temperature at which K=1.0*10^-6.
A politician claims that she will receive 59% of the vote in an upcoming election. The results of a properly designed random sample of 100 voters showed that 53 of those sampled will vote for her.
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