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
Anna71 [15]
3 years ago
9

Need an answer in Meters

Physics
1 answer:
chubhunter [2.5K]3 years ago
6 0

Answer:

• let's first get time

{ \rm{s = ut +  \frac{1}{2}g {t}^{2}  }} \\  \\ { \rm{78.4 = 30t + 5 {t}^{2} }} \\  \\ { \rm{ {t}^{2}  + 6t - 15.68 = 0}} \\  \\ { \rm{time  \approx \: 2 \: seconds}}

• let's find horizontal displacement

{ \rm{s = ut +  \frac{1}{2}g {t}^{2}  }} \\  \\ { \rm{s = (30 \times 2) \times ( \frac{1}{2} \times 0 \times  {2}^{2})  }} \\  \\ { \rm{displacement = 60 \: meters}}

  • g is acceleration due to gravity [ vertically: g is 10 m/s². horizontally: g is 0 ]
You might be interested in
What is the density of an object with a volume of 20 cm3 and a mass of 40g?
melisa1 [442]
Density = mass/volume
Density = 40g/20cm^3
Density = 2g/cm^3
3 0
3 years ago
1. This heating system maintains room temperature at or near a particular value, known as the .
stiv31 [10]

Answer:

Explanation:

1. This heating system maintains room temperature at or near a particular value, known as the set point.

A temperature setpoint is the level at which the body attempts to maintain its temperature. When the setpoint is raised, the result is a fever.

2. You open the window, and a blast of icy air enters the room. The temperature drops to 17 degrees Celsius, which acts as a STIMULUS to the heating system.

3. The thermostat is a SENSOR that detects the stimulus and triggers a response.

Thermostat is use to turn off or on a switch, when the temperature is high or low

4. The heater turns on, and the temperature in the room INCREASE until it returns to the original setting.

This is the work of the thermostat above, when the temperature of the room is below a certain temperature the thermostat triggered the switch and keep increasing the temperature of the room until normal setting.

5. The response of the heating system reduces the stimulus. This is an example of NEGATIVE feedback.

Body temperature is regulated by negative feedback. The stimulus is when the body temperature exceeds 37 degrees Celsius, the sensors are the nerve cells with endings in the skin and brain, the control is the temperature regulatory center in the brain, and the effector is the sweat glands throughout the body.

6. The way this heating system maintains a stable room temperature is similar to the way an animal's body controls many aspects of its internal environment. The maintenance of a relatively constant internal environment is known as HOMEOSTASIS.

Humans rely on homeostasis to keep their core temperature hovering around 98.6 degrees Fahrenheit, so that their bodies can maintain proper function. Homeostasis is the ability to maintain a relatively stable internal state that persists despite changes in the world outside.

5 0
4 years ago
Boxes A and B are in contact on a horizontal, frictionless surface. Box A has mass 21.0 kg and box B has mass 8.0 kg. A horizont
vfiekz [6]

Answer:

2.75 N

Explanation:

Given that,

Box A has a mass 21.0 kg and box B has a mass 8.0 kg.

A horizontal force of 100N is exerted on box A.

Let a be the acceleration of the system. Using second law of motion,

F=(m_A+m_B)a\\\\a=\dfrac{F}{(m_A+m_B)}\\\\a=\dfrac{10}{(21+8)}\\\\a=0.344\ m/s^2

Now applying Newton's second law to box B. So,

F_A=m_Ba\\\\=8\times 0.344\\\\=2.75\ N

So, 2.75 N is the force that box A exerts on box B.

8 0
3 years ago
To see the acceleration graph, go to the x vs. t graph in “Frame 3” and change the vertical axis to ax. Now step through the mov
brilliants [131]

Answer:

The ax versus t graph stays in the range of 2.5 to 3 m/s2 for the first 2 seconds or so, and then it drops quickly to just below 0 m/s2. This corresponds well with the slope of the vx graph: relatively constant positive slope for the first 2.5 seconds, and then zero (and even negative) slope afterwards.

Explanation: Edmentum

4 0
2 years ago
Read 2 more answers
What happens to the magnitude of the momentum of an object if the mass of the object halved?<br>​
nekit [7.7K]

Answer:

Momentum is directly proportional to velocity. If momentum of an object is doubled , but its mass does not increase (so velocity remains below the speed of light) then its velocity is doubled. If the velocity is doubled, then the kinetic energy increases by four times.

Explanation:

Hope it is helpful....

8 0
3 years ago
Other questions:
  • The velocity of a car is 65 m/s and it’s mass is 2515 kg. What is it’s KE?
    10·2 answers
  • How did Rachel carsons book, silent spring, alter the way people thought about and treated the Earth?
    14·2 answers
  • Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial spe
    13·2 answers
  • What kind of organ system does the large intestines belong to
    11·1 answer
  • Estimate the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved through a distance of 2.8 m and is rel
    13·2 answers
  • 5. A 1.2 m guitar string is under a tension of 888 N. The waves produced on the string (when
    10·1 answer
  • The power of a machine mesures
    14·1 answer
  • An extended period of well-below-average temperatures is known as a
    15·2 answers
  • Suppose 3 mol of neon (an ideal monatomic gas) at STP are compressed slowly and isothermally to 0.19 the original volume. The ga
    6·1 answer
  • What do you mean by work?​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!