A ball with a density of 1100 kg/m3 is submerged in two liquids: water (ρ = 1000 kg/m3) and honey (ρ = 1400 kg/m3). What will the ball do?
Responses
We do not have enough information because we need to know the mass of the ball in order to determine whether it will sink or float.
We do not have enough information because we need to know the mass of the ball in order to determine whether it will sink or float.
It will sink and accelerate downwards in honey. It will float and accelerate upwards in water. Objects with a smaller density than the surrounding liquid sink, while objects with a greater density than the surrounding liquid float.
It will sink and accelerate downwards in honey. It will float and accelerate upwards in water. Objects with a smaller density than the surrounding liquid sink, while objects with a greater density than the surrounding liquid float.
The ball will sink in both the honey and the water because any solid object will sink in a liquid.
The ball will sink in both the honey and the water because any solid object will sink in a liquid.
It will sink and accelerate downwards in water. It will float and accelerate upwards in honey. Objects with a greater density than the surrounding liquid sink, while objects with a smaller density than the surrounding liquid float.
It will sink and accelerate downwards in water. It will float and accelerate upwards in honey. Objects with a greater density than the surrounding liquid sink, while objects with a smaller density than the surrounding liquid float.
Two crates are submerged under water. The crates are identical in size, but Crate A is filled with iron and Crate B has only air inside. Which crate has a greater buoyant force acting on it?
Responses
There is no way of knowing which object has a greater buoyant force acting on it until we can determine if they float. If both objects float, they have the same amount of buoyant force acting on them.
There is no way of knowing which object has a greater buoyant force acting on it until we can determine if they float. If both objects float, they have the same amount of buoyant force acting on them.
Crate A has a greater buoyant force acting on it because it is filled with iron, making it heavier. Buoyant force depends on the weight of the object.
Crate A has a greater buoyant force acting on it because it is filled with iron, making it heavier. Buoyant force depends on the weight of the object.
Crate B has a greater buoyant force acting on it because it is filled with air, so it will float. The object that floats will always have a greater buoyant force acting on it.
Crate B has a greater buoyant force acting on it because it is filled with air, so it will float. The object that floats will always have a greater buoyant force acting on it.
Both crates have the same amount of buoyant force acting on them because they are the same size and displace the same amount of water.
Both crates have the same amount of buoyant force acting on them because they are the same size and displace the same amount of water.
Crate A has a greater buoyant force acting on it because it is filled with iron, making it heavier. Buoyant force depends on the weight of the object.
A 100 kg boat is floating in water. Half of the boat is submerged under water. What is the weight of the boat?
Responses
50 kg
50 kg
0 N
0 N
980 N
980 N
490 N
980 N
A liquid is moving through a pipe. If the speed of the liquid decreases, what happens to the pressure within the liquid?
Responses
The pressure within the liquid decreases.
The pressure within the liquid decreases.
Only density affects pressure, so pressure stays the same.
Only density affects pressure, so pressure stays the same.
The pressure within the liquid increases.
The pressure within the liquid increases.
The pressure within the liquid becomes zero.
The pressure within the liquid increases.
A box exerts 10,000 Pa of pressure on the ground. If the box weighs 1000 N, how much area is in contact with the ground?
Responses
0.1 m2
0.1 m 2
10 m2
10 m 2
10,000,000 m2
10,000,000 m 2
11,000 m2
0.1 m2
A person is standing on ice. He throws a snowball with a force of 4 N to the right, while the snowball pushes the person with a force of 4 N to the left. What is the net force on the person?
Responses
4 N, right
4 N, right
0 N
0 N
8 N
8 N
4 N, left