Which must exist for electric charges to flow?

The acceleration of an object as a function of time is given by a (t) = (1.00 m/s2) t2. If displacement of the object between time and time t = 2.00 s is 15.0 m, what is the velocity of the object at time t = 0.00 s? a-13.

When the ratio of two variables is constant, their relationship can be described as? 1. directly proportional. 2. interdependent. 3. inversely proportional. 4. parallel.

Because there is very little friction, the lever is an extremely efficient simple machine. using a 90.0% efficient lever, what input work is required to lift a (n) 19.0 kg mass through a distance of 45 cm? 3232 incorrect: your answer is incorrect.

How do you find the graphical solution when adding vectors

Water evaporates off lakes. Winds blow across the planet. Where does the energy come from for these and other weather processes? A. Heat from the Earth's core. B. Solar energy. C. Cold currents in the ocean. D. Rising cool air creating a cold front.

You create a transformer by wrapping wire around an iron nail. The number of turns are: Primary (500); Secondary (2500). The Primary voltage is 3.00 V. The Secondary current is 200 mA.

A 90kg cannon fires 100kg shell with muzzle velocity of 75m/s. Calculate the recoil velocity of the cannon relative to the ground

The planet XYZ traveling about the star ABC in a circular orbit takes 24 hours to make an orbit. Assume that the orbit is a circle with radius 89 comma 000 comma 00089,000,000 mi. Find the linear speed of XYZ in miles per hour.

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is a. 3.0" 102 N b. 0.22 N c. 0.16 N d. 0.30 N e. 0.98 N

What is the formula for calculating the mass when i have the number of volume and density