How much heat is needed to melt 2.5 kg of lead? The latent heat of fusion for lead is 5.85 Kcal/kg. The latent heat of vaporization of lead is 20.8 kcal/kg

A concrete column has a diameter of 380 mm and a length of 2.6 m. if the density (mass/volume) of concrete is 2.45 mg/m3, determine the weight of the column in pounds.

The equation for impulse is I = Ft, where I is impulse, F is force, and t is time. The units for impulse are N. s. a. what is the impulse when there is a force of 30 N for a time of 4 seconds? b. What is the force when there is an impulse of 18 N.

The Air Quality Index measures A. the level of carbon monoxide over the previous ten days. B. deterioration in the ozone layer. C. concentration of five air pollutants of concern to health. D. amount that visibility is diminished by smog.

Examine the information. A truck accelerates 3 km/h/s south. Which option correctly describes the truck's acceleration? a. Every second the truck's position increases by 3 km to the south. b.

The ideal gas law includes all of the following properties, except the a. volume a gas occupies. b. pressure a gas exerts. c. temperature of a gas in kelvin. d. density of a gas in g/mL.

A trained attack octopus can crawl at a velocity of 0.3m/s. If the octopus crawls towards its victim for 30 seconds, what is the change in position (or distance) that the octopus crawled?

Which profession is responsible for a planes design? A) Aerospace engineering B) Aerospace mechanic C) Pilot D) Flight attendant

Distracted driving laws have been put in place due to scientific studies that have shown the dangers associated with wireless technology. DDT. plastics. vaccines.

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, the current through the resistor is (1) halved (3) quartered (2) doubled (4) quadrupled

If it takes 20n to move a box, how much power will be needed to move the box a diatance