What particle determines an atom's identity and never changes?

Which of the following objects would require the use of a large-scale model? A) an atom B) a car engine C) a frog's heart D) the Mississippi River

Which is purely physical and which is both physical and chemical

Texas's relative location near the Gulf of Mexico A. affects the amount of sunshine it receives. B. greatly affects every part of Texas. C. has little effect on Texas's climate. D. affects the amount of rainfall it receives.

Determine how potential and kinetic energy changes at each position of the pendulum as the ball swings from A to E.

A 12-kg crate rests on a horizontal surface and a boy pulls on itwith a force that is 30? below the horizontal. If the coefficient of static friction is 0.40, theminimum magnitude force he needs to start the crate moving is: A. 44N B. 47N C. 54N D.

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?