Which of the following types of pollution is NOT linked to coal-burning power plant emissions?

A) acid rain

B) global warming

C) ozone hole

D) smog

Tommy was walking at a rate of 4 miles per hour at noon and at 12:30 pm he was walking at a brisk rate of 6 miles per hour. Two hours later tommy was walking at a leisurely rate of 2 miles per hour.

A spherical ball of weight 50 N is to be lifted over the step 5 cm high. the ball has radius 10cm front he flatter side and 20 cm from the round one (since it is a sphere). calculate the minimum force needed to just lift it above the floor

A 1000 kg car moves as speed from 10 m/s to 30 m/s in 20 seconds. What is the average speed? What is the acceleration? What is the average force acting upon it?

Technician A says that valve springs should be kept with the valve at the time of disassembly and tested for squareness and proper spring force. Technician B says that the exhaust valve is about 50 percent of the size of the intake valve.

The torque required to turn the crank on an ice cream maker is 4.50 nm how much work does it require to turn the crank 300 full turns?

A conductor carrying a current I = 13.8 A is directed along the positive x axis and perpendicular to a uniform magnetic field. A magnetic force per unit length of 0.116 N/m acts on the conductor in the negative y direction.

Sebuah benda berjarak 8 cm di depan cermin cekung yang memiliki fokus 12 cm. perbesaran bayangan yang dihasilkan adalah? tentukan juga M nya?

How much pressure is there in the atmosphere and the lithosphere?

a plane lands on the runway and slows from 758km/hr to 30km/hr in 0.013 hours what is the planes acceleration?

3. solve the following with regard to significant figures a) 5.8 + 0.125 II) 3.9x105-2.5x104