7. The slope of a line on a distance-time graph represents

A distance

B time

C displacement

D speed

If a simple machine reduces the strength of a force, what must be increased? A. the distance that the force moves B. the work the simple machine performs C. the speed of the input force D. the size of the simple machine

What factors may contribute to aging? A. Cells stop dividing after 50 divisions. B. Cells become more and more damaged. C. Genes "tell" cells to stop dividing. D. all of the above

Quando se deseja saber se uma pessoa está com febre, é comum colocar a mão na testa dela, para sentir se está quente. formule duas explicações para o que acontece nessa situação, uma microscópica e outra microscópica?

What type of radiation dose a microwave emit?

What causes the end of a star?

A projectile is launched over a horizontal surface in such a manner that its maximum height is 3/5 of its horizontal range. Determine the launch angle.

Two identical capacitors are arranged in a circuit. What is the ratio of the equivalent capacitance of the circuit when the capacitors are in series to that when they are in parallel?

A car's position in relation to time is plotted on the graph. What is the car's average velocity for segment C? A) - 4 m/s B) - 0.25 m/s C) 0.25 m/s D) 4 m/s

What percent of my Iodine-131 sample will be left after 7 half-lives?

A 58.0 kg snow skier is on the top of 351 m high hill. After she has gone down a vertical distance of 142 m, what is her mechanical energy? Explain your answer (CER) !