A merry-go-round rotates with a centripetal acceleration of 15 m/s2. If the

outer horses are 7 m from the center of the ride, what is their velocity?

O

A. 11.8 m/s

O

B. 10.2 m/s

O

O

C. 9.6 m/s

D. 8.4 m/s

a box has mass 60 kg and it is lying on the earth surface occupying an area of 6000 CM square then the pressure exerted by it on the ground is equal to

A 6.93 µF capacitor charged to 94 V and a 1.76 µF capacitor charged to 81 V are connected to each other, with the two positive plates connected and the two negative plates connected. What is the final potential difference across the 1.

A long solenoid that has 810 turns uniformly distributed over a length of 0.380 m produces a magnetic field of magnitude 1.00 10-4 T at its center. What current is required in the windings for that to occur

You find a rock in which the grains are arrenged in wavy, parallel bands of white and black crystals. What kind of rock have you probably found?

When the temperature in the air is 50°C, the velocity of a sound wave traveling through the air is approximately A. 381 m/s B. 30 m/s C. 50 m/s D. 361 m/s

What happens to the resistance of a filament if it is replaced by a shorter wire?

One group of scientists feel that global warming affects the frequency of hurricanes. Another group of scientists believe that global warming does not affect the frequency of hurricanes, but it makes the average hurricane stronger.

In an experiment, all participants receive a treatment but those in the control group recieves a false treatments

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall