1. On a planet where the gravitational acceleration is g=10 m/s², a solid cube of wood...

1. On a planet where the gravitational acceleration is g=10 m/s², a solid cube of wood measuring one foot on each edge exerts a uniform pressure of 3048 Pa on a flat tabletop due to its weight. Find the wood's specific gravity and state whether it will float on water. One foot is 0.3048 m.

2. A crown is made of an alloy consisting of gold (19 g/cc) and copper (9 g/cc). It weights 35 N in air, and 32.5 N when submerged in water. What fraction of its volume is gold?

Expert Solution

genius_generous answered 1 year ago

You are touring a distant planet on which the magnitude of the gravitational acceleration is 65%...

You are touring a distant planet on which the magnitude of the gravitational acceleration is 65% of that near the earth's surface. For a little adrenaline, you decide to jump off a precipice 500m above the planet's surface. After 5 seconds of free fall, you ignite the jet pack on your back, changing your acceleration to some new, constant value for the rest of your fall. If you reach the surface 26 seconds after ingiting the jet pack, with what...

A planet has the same density as Earth but has a surface gravitational acceleration of nine...

A planet has the same density as Earth but has a surface gravitational acceleration of nine times that of the Earth (a person would instantly black out if placed on the surface). What is the escape velocity from the planet? If the planet was in an orbit of 1 AU from a 1 M⊙ star, what is the maximum distance that a moon could orbit the planet?

If the moon is standing in the zenith (directly over us), the effective gravitational acceleration g...

If the moon is standing in the zenith (directly over us), the effective gravitational acceleration g is reduced on the surface of the earth. If the moon is in the nadir (directly under us), will g be larger?

A 12.7 g bullet is fired into a block of wood at 245 m/s. The block...

A 12.7 g bullet is fired into a block of wood at 245 m/s. The block is attached to a spring constant of 205 N/m. The block and bullet continue to move, compressing the spring by 35.0 cm before the whole system momentarily comes to a stop. Assuming that the surface on which the block is resting is frictionless, determine the mass of the wooden block.

Assume a planet with mass M and radius R. (a) Find the strength of its gravitational...

Assume a planet with mass M and radius R. (a) Find the strength of its gravitational field at the surface, g. [5] (b) Find the escape velocity, vesc, for a mass on the planet's surface in terms of M and R. [10] (c) Show that vesc=√2gR . [3] (d) Calculate the numeric value of the escape velocity from Earth without using Earth's mass. [2]

An object of 4 kg (assuming the acceleration of gravity g = 10 m / s2...

An object of 4 kg (assuming the acceleration of gravity g = 10 m / s2 ) suspended from a spring causes the spring to stretch 2 cm downwards. The object is moved 3 cm down from from its equilibrium position in the positive direction of movement, then it is released with speed zero initial. Assuming that there is no damping and that the object is under external force equal to: 20cos4(t) (N) a) Formulate the initial value problem that...

Using the universal gravitational constant G=6.67•10^11 (look up units), derive the Earth’s acceleration of gravity 9.81...

Using the universal gravitational constant G=6.67•10^11 (look up units), derive the Earth’s acceleration of gravity 9.81 m/s2

#1= A train reaches a velocity of 40 m/s in 10 seconds from rest. Its acceleration...

#1= A train reaches a velocity of 40 m/s in 10 seconds from rest. Its acceleration is? #2= If the distance between the Earth and the Sun decreases, the gravitational force between them will? #3=A 0.4 kg baseball has a velocity of 20 m/s. Its kinetic energy is? #4=A rock has a volume of 0.18 m3. If it is totally immersed into water, what’s the buoyant force it will experience? ( density(water)=1000 kg/m3, g=10m/s2 ) #5=A box has a weight...

On a planet, the acceleration due to gravity is only 7.2 m/s2. A person living on...

On a planet, the acceleration due to gravity is only 7.2 m/s2. A person living on that planet throws a football at 10 m/s at an angle of 48 degrees to the horizontal. The person is standing, so the ball launches from an initial height of 1.8 meters above the ground. (Ignore any air resistance here.) What maximum height from the ground would the ball reach? What would be the flight time before the ball gets back to the ground?

A wood cube 0.40 m on each side has a density of 750 kg/m³ What mass...

A wood cube 0.40 m on each side has a density of 750 kg/m³ What mass has to be placed on top of the wood so that its top is just at the water level?

Question