Express the answer using two significant figures

Reference no: EM139500

Q1. What is the frequency shift of a 68 police radar signal when it reflects off a car moving at 117? (Radar waves travel at the speed of light.)

Express the answer using two significant figures.

Q2. As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier and takes 0.4 to stop.

Reference no: EM139500

Questions Cloud

What is the change in its linear momentum : A new circus act is called the Texas Tumblers. Lovely Mary Belle swings from a trapeze, projects herself at an angle of 53, and is supposed to be caught by Joe Bob, whose hands are 6.10 above and 8.02 horizontally from her launch point. You can ignor..

If the mass of the butterfly is 12 g, at what acceleration : Two wires, each 28.15 cm long, are connected to two separate 9.00 V batteries as shown in the figure. The resistance of the first wire is 5.00 Ω, and that of other wire is unknown (R). If the separation between the wires is 4.55 mm, what value of R w..

Assume the blocks are equal length : A dam is used to block the passage of a river and to generate electricity. Approximately 5.73 x 10^4 kg of water fall each second through a height of 19.6 m. I one half of the gravitational potential energy of water were converted to electrical energ..

What is the acceleration of the crate : A pump, submerged at the bottom of a well that is 34 m deep, is used to pump water uphill to the house that is 50 m above the top of the well, as shown above. All pressures are gauge pressures. Avoid the effects of friction, turbulence, and viscosity..

Express the answer using two significant figures : As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier an..

Explain how labor market equilibrium is affected : Explain how labor market equilibrium is affected by the supply also demand of labor.

What is the magnitude his displacement : Blocks with masses of 4.0, 8.0, and 9.0 are lined up in a row on a frictionless table. All three are pushed forward by a 16 force applied to the 4.0 block. How much force does the 8.0 block exert on the 8.0 block.

What net force is exerted on it : If a car travelling at 63 km/h will skid 18 m when its brakes lock, how far will it skid if it is travelling at 150 km/h while its brakes lock.

The demand for milk is more elastic than demand for water : The demand for milk is more elastic than the demand for water. Assume the government levies an equivalent tax on milk also water.

User Account

All Pages