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find the magnitude and direction of the net external force on the crate
A 10.0 kg grocery is pushed 12.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. a.) What work is done on the cart? b.)If all frictional forces are neglected, and th
Find the pressure difference between the inside and outside of the window.
The 2.2 kg, 20 cm diameter disk in the figure below is spinning at 280 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 5.0 s?
How much heat is required to convert solid ice with a mass of 525 g and at a temperature of -10.5 °C to liquid water at a temperature of 69.5 °C? (The specific heat of ice is cice = 2100 J/
A box of well known breakfast cereal states that one small portion of the cereal contains 110 Calories (1 Cal = 4186 J). If 2.0 % of this energy could be converted by a weight lifter's body into wo
A photomultiplier tube in a scintillation counter contains 12 of the special electrodes or dynodes. Suppose each dynode produces 5 electrons for every electron that strikes it. One photoelectron st
Compare the force an abrupt(hard) and a cushioned (soft) collision if the impulse are equivalent. use word and also sketch the force vs. time graphs.
A 1300 {rm kg} wrecking ball hangs from a 20 {rm m}-long cable. The ball is pulled back until the cable makes an angle of 24.0^circle with the vertical. By how much has the gravitational potential
Homozygotes for AT rarely survive to adulthood. Heterozygotes rarely show symptoms while young but are at substantially incrased risk for contracting several forms of cancer as adults. Explain.
A ship sets out to sail to a point 182 km due north. An unexpected storm blows the ship to a point 158 km due east of its starting point. How far must it now sail to reach its original destination?
The loop in figure shown carries a current I=2.50A. The semicircular portion has a radius R=5.00cm and L=10.0cm. Determine the magnitude and direction of the magnetic field at point A.
Under these circumstances, nonparametric tests can be very useful.
4. What genetically modified corn variety was only supposed to be used for animal feed, but turned up in human foods?
A metal sphere of radius a carries charge Q,it is surrounded out to a radius b, by linear dielectric material of permittivity, find the electric displacement.
Moe, Larry, and Curly stand in a line with a spacing of d = 1.30 m. Larry is 3.00 m in front of a pair of stereo speakers 0.800 m apart, as shown in the figure . The speakers produce a single-frequ
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.5 °C. What should be the minimum temperature of the hot heat reservoir in order to reach at least 46.4 pe
What special feature does muscle tissue have
How does the velocity of air moving over the top of the wing of an airplane in flight compare to the velocity of air moving under the wing?
An automobile club plans to race a 760 kg car at the local racetrack. The car needs to be able to travel around several 140 m radius curves at 94 km/h. What should the banking angle of the curves be
Animals that chew food have sharp teeth for tearing food and/or molars for grinding food
Continue until there are no words, or only a few, remaining, along with the periods, commas etc. See if they can still read it. Usually they can, or if only a few can, they become heroes.
The measured masses of these isotopes are 2.32×10-26 {rm kg} ({^{14,}{rm N}}), 1.99×10-26 kg and 2.49×10-26 Kg. Find the separation of the isotopes at the detector.
A 5.00m long diving board of negligible mass is supported by two pillars. One pillar is at the left end of the diving board: the other is 1.50m away. Find the forces exerted by the pillars when a 9
What changes in program design and staff development are needed to ensure that assessment tools are reliably used?