A less common type of radioactive particle emitted is the positron. If potassium-38 forms argon-38 by positron emission, the number of a positron is and the charge is

What number is neutrons protons electrons of helium

Which of the following statements describes the interaction between magnetic poles? A. Like poles attract each other. B. Like poles repel each other, and opposite poles attract each other. C. Opposite poles repel each other. D.

A certain tank is filled to one quarter of its capacity with a mixture consisting of water and sodium chloride. The proportion of sodium chloride in the tank is 40% by volume and the capacity of the tank is 24 gallons.

A 1200-kg car accelerates it's speed from 4 m/s to 10 m/s in 3 seconds. Find the car average speed, the car acceleration, the distance traveled by, & the net force on car

Accelerations are produced by equal forces or unequal forces?

In the movie "Santa Claus is Coming to Town", the Mayor Burgermeister Meisterburger outlaws toys after tripping on a rubber duck. To make rubber ducks un-crushable while being delivered by Santa, the ducks are filled with an inert, harmless gas. A 2.

Which of the following represents a chemical change? rocks being smoothed by rapid water movement the pink color of a rose iron's attraction to a magnet decomposition of stone due to acid rain

How many grams of CO2 are in 3 mol of the compound?

o keep yourself warm in the winter, you heat a solid metal ball and place it on a stand in the center of your room. The ball has a radius of 20.0 cm and an emissivity of 0.790.

How many brothers and sisters did beethoven have?