A 630 n student stands on a scale in an elevator

Reference no: EM1310306

Q1. A 630 N student stands on a scale in an elevator. As the elevator starts to move, the scale reads 750 N.

a. Find the acceleration.

b. Is the elevator going up or down?

Q2. An insulated Thermos contains 145 cm3 of hot coffee at 89.0 °C. You put in an 11.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat coffee although it was pure water and neglect energy exchanges with the environment. The specific heat of water is 4186 J/kg•K. The latent heat of fusion is 333 kJ/kg. The density of water is 1.00 g/cm3.

Reference no: EM1310306

Questions Cloud

How liquid is heavy-duty tractors : How liquid is Heavy-Duty Tractors? Support your answer with any ratios that you believe are necessary to justify your conclusion. Also indicate any other information that you would want to have in making a final determination on its liquidity.

The angular acceleration of the disk : A uniform solid disk with a mass of 23.8 kg and a radius of 0.712 m is free to rotate about a frictionless axle. Forces of 92.0 and 124 N are applied to the disk. Taking the clockwise direction to be the negative direction, what is (a) net torque pro..

Computation of expenses and opportunity costs to pursue mba : Explain how and why you made decision to pursue a MBA. Comprise in that description computations of expenses and opportunity costs related to that decision.

What will you tell your boss : What will you tell your boss? Should he recommend to the board of directors that Diversified put in a bid for Heavy-Duty Tractors?

A 630 n student stands on a scale in an elevator : An insulated Thermos contains 145 cm3 of hot coffee at 89.0 °C. You put in an 11.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat c..

Computation of betas for portfolios : Computation of betas for portfolios and compare the risks of these portfolios to the markets and Which portfolio is more risky

What is the longest wavelength of light : A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 56° above the horizontal. The weight of the ladder is 35 pounds. A 77 lb boy climbs 6.0 ft up the ladder. What is the magnitude of the friction force exerted on the lad..

Major weakness of performance report : Discuss the major weakness of performance report. Describe clearly why all the variances for variable expenses are unfavourable (U).

Evaluate the total deferred tax asset : Evaluate the total deferred tax asset and deferred tax liability amounts at December 31, 2009 and evaluatethe increase (decrease) in the deferred tax asset and deferred tax liability accounts at December 31, 2009.

User Account

All Pages