mike's car can accelrate from 0 mph to 40 mph in 5 sec. what is the acceleration of his car miles per hour per sec?

Suppose a friend tells you scientific theory is guesswork and is not supported by evidence

A block of mass 20 kg sits on a ramp with an angle of 31 degrees above the horizontal. Assuming no friction, how fast will the block accelerate down the ramp? 7.89 m/s^2 5.34 m/s^2 2.98 m/s^2 4.17 m/s^2

Two speakers face each other, and they each emit a sound of wavelength λ. One speaker is 180∘ out of phase with respect to the other. If we separate the speakers by a distance 1.

A sound wave enters a new medium where sound travels faster. How does this affect the frequency and wavelength of the sound?

The diagram shows the field lines near the poles, X and Y, of two magnets. Answer X: north Y: north

A liquid has a specific gravity of 1.1 at room temperature. what is its density at room temperature kg/m3

Suppose earth were moved to a distance from the sun equal to 4 AU. How much weaker would the sun's gravitational force on earth be? Why?

A scientist wants to learn more about differences in motion of objects both on the planet earth and on the planet mars. What branches of science should he study?

Consider a 150-w incandescent lamp. the filament of the lamp is 5-cm long and has a diameter of 0.5 mm. the diameter of the glass bulb of the lamp is 8 cm.

According to Special Relativity, which statement is true: 1. The linear dimension of an object is the same in any two inertial systems 2. The linear dimension of an object is shorter in a system that uses two clocks 3.