1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Eddi Din [679]
2 years ago
11

A cannon at rest fires a 32.5 kg cannonball forward at 388 m/s. After firing, the cannon recoils at 7.42 m/s. What is the mass o

f the cannon?
(Unit = kg)
Remember: right is +, left is -
Physics
1 answer:
Bond [772]2 years ago
3 0

Answer:

1700 kg

Explanation:

Let’s use conservation of momentum

32.5 * 388 = 7.42 * mc

mc = 1699.46

mc = 1700 kg

You might be interested in
A 1.00 kg object is attached to a horizontal spring. the spring is initially stretched by 0.500 m, and the object is released fr
valina [46]
The  spring is initially stretched, and the mass released from rest (v=0). The next time the speed becomes zero again is when the spring is fully compressed, and the mass is on the opposite side of the spring with respect to its equilibrium position, after a time t=0.100 s. This corresponds to half oscillation of the system. Therefore, the period of a full oscillation of the system is
T=2 t = 2 \cdot 0.100 s = 0.200 s
Which means that the frequency is
f= \frac{1}{T}= \frac{1}{0.200 s}=5 Hz
and the angular frequency is
\omega=2 \pi f = 2 \pi (5 Hz)=31.4 rad/s

In a spring-mass system, the maximum velocity of the object is given by
v_{max} = A \omega
where A is the amplitude of the oscillation. In our problem, the amplitude of the motion corresponds to the initial displacement of the object (A=0.500 m), therefore the maximum velocity is
v_{max} = A \omega = (0.500 m)(31.4 rad/s)= 15.7 m/s
6 0
3 years ago
An important difference between a universal and a split-phase motor is that the split-phase motor has A. two brushes attached to
olga nikolaevna [1]

An important difference between a universal and a split-phase motor is that the split-phase motor has

A. two brushes attached to the stator.

B. a single coil formed on the rotor.

<u>C. two windings on the stator. </u>

D. an armature with a commutator.​

6 0
3 years ago
In addition to an all-round white light, what light(s) must power-driven vessels less than 65.6 feet (20 meters) long exhibit wh
Lemur [1.5K]
The vessel must also have red and green side lights.

The red light is placed on the port (left) side of the boat while the green light is placed on the starboard (right) side of the vehicle. The white lights are on both the masthead (front) and stern (rear) of the boat, unless the vessel is less than 39.4 feet, in which case the front and rear white light may be combined as only one white light.
7 0
2 years ago
Read 2 more answers
Problem 3.
Korolek [52]

Answer:

143.352 watt.

Explanation:

So, in the question above we are given the following parameters or data or information that is going to assist us in answering the question above efficiently. The parameters are:

"A 1.8 m wide by 1.0 m tall by 0.65m deep home freezer is insulated with 5.0cm thick Styrofoam insulation"

The inside temperature of the freezer = -20°C.

Thickness = 5.0cm = 5.0 × 10^-2 m.

Step one: Calculate the surface area of the freezer. That can be done by using the formula below:

Area = 2[ ( Length × breadth) + (breadth × height) + (length × height) ].

Area = 2[ (1.8 × 0.65) + (0.65 × 1.0) + (1.8 × 1.0)].

Area = 7.24 m^2.

Step two: Calculate the rate of heat transfer by using the formula below;

Rate of heat transfer =[ thermal conductivity × Area (T1 - T2) ]/ thickness.

Rate of heat transfer = 0.022 × 7.24(25+20)/5.0 × 10^-2 = 143.352 watt.

8 0
3 years ago
Why do objects closer to you move faster than the objects far away when driving in a car?
ella [17]
It is kind of an optical illusion it is called <span>optical flow.</span>
7 0
2 years ago
Other questions:
  • How can operators avoid damaging Submersed Aquatic Vegetation (SAV) beds that are usually found in shallow areas of water?
    15·1 answer
  • Every Saros cycle (19 eclipse years): A. All total solar eclipses occur as total solar eclipses. B. All annular solar eclipses o
    7·1 answer
  • Which of the following describes an organ system?
    10·2 answers
  • I dont get why its c i dont under the graph for the vertical component in option c
    14·1 answer
  • Spacetime interval: What is the interval between two events if in some given inertial reference frame the events are separated b
    10·1 answer
  • The mysterious visitor that appears in the enchanting story The Little Prince was said to come from a planet that "was scarcely
    14·1 answer
  • An atom has 35 protons. what element is it?
    10·2 answers
  • A satellite orbits earth with a mean altitude of 361 km. If the orbit is circular, what are the satellite's time period and spee
    5·1 answer
  • How much does a person weigh if it takes 700 kg*m/s to move them 10 m/s<br><br> NEED ASAP
    14·1 answer
  • An electric charge of 1 microcoulomb is affected by an electric field of intensity 1000 newtons per coulomb at a point, then thi
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!