a force of 20 N acted on a ball thereby imparting an impulse of 70 Ns to the ball. For how long did the force act on the ball?

Describe the results of Ernest Rutherford's gold-foil experiment and explain how his results changed ideas about the distribution of positive charge within the atom.

If an object has two forces that are equal in magnitude, but acting on it in opposite directions, what are some possible things it could be doing?

A person eats a dessert that contains 280 Calories. (This "Calorie" unit, with a capital C, is the one used by nutritionists; 1 Calorie = 4186 J.) The skin temperature of this individual is 36°C and that of her environment is 17° C.

Calculate the mass of a gas with a density of 0.0065 g/cm3 and volume of 260cm3

Methane gas absorbs red light, and methane clouds reflect blue light, giving Uranus and Neptune their distinctive blue colors. Why do Uranus and Neptune have methane clouds, but Jupiter and Saturn do not

What Science is/is not and How Physics and Chemistry are Connected

What two properties of sound remain the same when sound quality differs? A. amplitude B. frequency C. intensity D. loudness E. pitch F. resonance

A 1650 kg car accelerates at a rate of 4.0 m/s^2. How much force is the car's engine producing?

What is an example of when momentum is not conserved?

When a certain isotope, such as U-238, is hit by a neutron, it will always split into the same smaller nuclei. true or false?