Question

1-a rock is weighted in air and found to have a mass of 81.0g.
it is dropped into a beaker, that was initially filled level full
of water, and completely submerged.if 22.3cm^3 of water overflow,
what is the density of the rock?

2-a bullet is moving at 414 m/s as it leaves a rifle barrel
that is 6.1cm long.if the mass of the bullet is 0.028kg, what
average force was applied to it in the barrel?

Answer #1

**please do hit a
like**

The weight of the rock in air is 0.91N. When it is
completely submerged in water, its weight is
0.52N. What is the buoyant force acting on the rock when it is
completely submerged in the
water and what is the displaced water volume?
b. How adjust a ship volume and weight in order to float in certain
level?

Consider a stationary submarine completely submerged in the water
in the Pacific Ocean. Take the density of sea water to be
1030kg/m^3.
a) What is the net force acting on the submarine?
b) What is the average density of the submarine (including the
air)?
c) If the mass of the submarine is 3.5x10^7kg, what is the
volume of the submarine?
d) What is the buoyancy force acting on the submarine?
e) Imagine that the submarine drops a large rock decreasing...

1. On a frictionless horizontal air table, puck A (with mass
0.252 kgkg ) is moving toward puck B (with mass 0.375 kgkg ), which
is initially at rest. After the collision, puck A has velocity
0.122 m/sm/s to the left, and puck B has velocity 0.651 m/sm/s to
the right.
Calculate ΔKΔKDeltaK, the change in the total kinetic energy of
the system that occurs during the collision.
2. A 2.5 kgkg block of wood sits on a frictionless table....

A cart with mass 271 g, moving on a frictionless linear air
track at an initial speed of 1.08 m/s hits an initially stationary
cart of unknown mass. After the collision, the first cart continues
in its original direction at 0.92 m/s. The collision is
elastic.
(a) What is the mass of the second cart?
(b) What is the speed of the second cart?
A block of mass 0.29 kg is placed on top of a light, vertical
spring of...

A lost shipping container is found resting on the ocean floor
and completely submerged. The container is 6.3 m long, 2.8 m wide,
and 2.1 m high. Salvage experts attach a spherical balloon to the
top of the container and inflate it with air pumped down from the
surface. When the balloon's radius is 1.2 m, the shipping container
just begins to rise towards the surface. What is the mass of the
container? Ignore the mass of the balloon and...

Problem 1: An air-boat.
Rangers at the everglades national park, ride an air-boat, the
mass of the air boat plus the rangers is 500 kg. The blades of the
boat push on the air with 1000N, while moving the rangers
experience an air resistance force of 200N directed opposite to the
direction of motion, and the boat a water resistance of 250N. They
move in straight line for 20s. Please complete the following
tasks:
Draw the free-body diagram showing all...

A helium balloon ride lifts up passengers in a basket. Assume
the density of air is 1.28 kg/m3 and the density of helium in the
balloon is 0.18 kg/m3. The radius of the balloon (when filled) is R
= 5.4 m. The total mass of the empty balloon and basket is mb = 121
kg and the total volume is Vb = 0.062 m3. Assume the average person
that gets into the balloon has a mass mp = 72 kg...

A helium balloon ride lifts up passengers in a basket. Assume
the density of air is 1.28 kg/m3 and the density of
helium in the balloon is 0.18 kg/m3. The radius of the
balloon (when filled) is R = 5 m. The total mass of the empty
balloon and basket is mb = 124 kg and the total volume
is Vb = 0.06 m3. Assume the average person
that gets into the balloon has a mass mp = 70 kg...

A helium balloon ride lifts up passengers in a basket. Assume
the density of air is 1.28 kg/m3 and the density of
helium in the balloon is 0.18 kg/m3. The radius of the
balloon (when filled) is R = 5 m. The total mass of the empty
balloon and basket is mb = 123 kg and the total volume
is Vb = 0.058 m3. Assume the average person
that gets into the balloon has a mass mp = 70 kg...

A helium balloon ride lifts up passengers in a basket. Assume
the density of air is 1.28 kg/m3 and the density of helium in the
balloon is 0.18 kg/m3. The radius of the balloon (when filled) is R
= 4.6 m. The total mass of the empty balloon and basket is mb = 126
kg and the total volume is Vb = 0.056 m3. Assume the average person
that gets into the balloon has a mass mp = 72 kg...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago