Reference no: EM1322255
1. A 500 N woman wearing high heels steps on your left foot. At the same time, the Incredible Hulk (weight 10,000 N), wearing running shoes, steps on your right foot. The area of the high heel is .2 cm squared and the area of the running shoes is 20 cm squared. Which foot has more pressure exerted on it? (A) Left foot (B) Right foot (C) both feet hurt equally (D) from the given information, it is impossible to determine the pressure exerted on either foot.
2. An 800 kg gorilla and a scrawny 50 kg physicist are hurrying to their respective laboratories when they accidentally collide. The poor physicist is knocked backward, while the gorilla is barely slowed down. This is because (A) the force with which the physicist struck the gorilla was greater than the force with which the gorilla struck the physicist (B) the force with which the gorilla struck the physicist was greater that the force with which the physicist struck the gorilla (C) the gorilla's mass is greater than the physicist's mass, so the physicist accelerates more than the gorilla when the same force is applied to each (D) none of the above
3. A 1kg turtle and a 2 kg turtle are ambling down the road at .05 m/s. Which turtle has the greater momentum? (A) The 1kg turtle (B) the 2 kg turtle (C) both turtles have the same momentum (D) form the given information, the moment of the turtles can’t be determined.
4. The turtles arrive at a 1 meter cliff and peer over the edge. Which of the following statements is true? (A) The potential energy of the 1 kg turtle is .1 joules. (B) the potential energy of the 1 kg turtle is 10 joules. (C) The potential energy of the 1 kg turtle is the same as the potential energy of the 2 kg turtle. (D) The potential energy of the 1 kg turtle cannot be determined form the information given.
5. An 800 kg gorilla and a scrawny 50 kg physicist are playing on a see-saw. To balance their weights correctly (A) the distance between the gorilla and the fulcrum of the see-saw should be more than the distance between the physicist and the fulcrum of the see-saw. (B) The distance between the gorilla and the fulcrum of the see-saw should be less than the distance between the physicists and the fulcrum of the see-saw (C) the physicist and gorilla should both sit the same distance from the fulcrum (D) the physicist and gorilla cannot balance the see-saw because force is always equal to torque.
6. Einstein's equation E= mc squared means that (A) matter is converted to energy when is travels at a speed equal to the square of the speed of light (B) the rest mass of an object varies with the speed of the object (C) an object has no energy unless it is moving (D) matter can be converted into energy
7. You drop a turtle in a tank of water. According to Archimedes, the turtle is buoyed upwards (A) by a force equal to the weight of the turtle (B) by a force equal to the weight of all the water in the tank (C) by a force equal to the weight of the water the turtle displaces (D) by a force equal to the turtle's volume.
8. Water has a higher specific heat capacity than iron. This is why water (A) heats more quickly than iron (B) heats more slowly than iron (C) is always hotter than iron
9. According to the second law of thermodynamics (A) heat will never of itself flow form one object to another (B) heat will m never of itself flow from a hot object to a cold object (C) heat will never of itself flow from a cold object to a hot object.
10. If the wavelength of an ocean wave is 1 m and the frequency of the wave is 2 Hz, then the speed of the wave is (A) 1/4 m/s (B) 1/2 m/s (C) 1 m/s (D) 2 m/s
|
The origin of the coordinate system
: The origin of the coordinate system and with a label at their heads. Two of these vectors are given in terms of the unit-vectors I and j as
|
|
How far from the finish should she begin to sprint
: Two cars are travelling on a dirt road between 3 consecutive poles after 5.40s they are side by side at next telephone pole. The distance between the poles is 66.30m.
|
|
What is the magnitude of its average acceleration
: A jogger accelerates from rest to 5.87 m/s in 3.53 s. A car accelerates from 21.3 to 34.7 m/s also in 3.53 s. (a) Find the magnitude of the acceleration of the jogger. (b) Find out the magnitude of the acceleration of the car. (c) How much further..
|
|
State the location of the fly in polar coordinates
: A helium-neon laser intended for instructional use operates 7.5 mW. Find out the maximum value of the electric field at a point where the cross sectional area of beam is 10 mm.
|
|
The wavelength of an ocean wave
: The wavelength of an ocean wave
|
|
Find out the x and y components of craft''s acceleration
: Vector A has a magnitude of 10m and makes an angle of 78o with the positive x axis. Vector B also has a magnitude of 13m and is directed along the negative x axis. Enter your answers in distance then angle (in degrees).
|
|
A rope is wrapped around a wooden cylinder
: The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
|
|
What is the block''s speed at the point
: A toy train is pushed forward and released at xi = 1.60 m with a speed of 2.60 m/s. It rolls at a steady speed for 1.30 s, and then one wheel begins to stick. The train comes to a stop 6m from its starting point. What is the train's acceleration a..
|
|
At what angle is the beam refracted
: If the height of the candies in the container increases at the rate of 0.29cm/s, at what rate (kilograms per minute) does the mass of the candies in container increase.
|