Your friend, who is age 15 and has a resting heart rate of 70, wishes to start a jogging program. What would you suggest as a proper starting target heart rate?

138

115

178

155

A model rocket is launched straight upward with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration of 2.00 m/s2 until its engines stop at an altitude of 150 m.

A biker traveling at 35mi/hr hits a hay bale and is stopped in. 5s what is the bikers acceleration?

A wire on the left with 9 coils and labeled primary winding. Another coil is near it with 3 coils labeled secondary winding V subscript 2 baseline equals 120. Use the values provided to calculate the initial voltage at the primary winding. V1 = ? V

Magnesium (+2) chloride (-1) is an ionic compound. Which is the chemical formula for magnesium chloride? A. Mg2Cl B. (MgCl) 2 C. MgCl2 D. Mg2Cl

What did Democritus discover?

A girl runs 20.9 m/s East for 13.7s. How far does she go?

Is it possible to have a weak acid or base?

Why does an object accelerate when falling to earth's surface?

2.5 g of helium at an initial temperature of 300 K interacts thermally with 9.0 g of oxygen at an initial temperature of 620 K.

34. A steam engine operates between 300K and 600K, the maximum possible efficiency of this engine is a. 100% b. 75% c. 50% d. 25%